GASTROPODS: TROCHID

-I's T. castaneus (North Carolina to the West Indies), cut is said to be more common at slightly shallower leptis (Dall, 1890-1903, pt. 2, p. 382, 1892). It has een considered a synonym of T. castaneus, a variety if castaneus, or a valid species. The collections of the J. S. National Museum indicate that the two forms ntergrade. They are considered forms of a variable species, at least until more is known about their habitat cnd habits.
 The fossils from Panama are nonlamellar. They are not as strongly shouldered as most Recent shells-that is, the spiral at the shoulder is not as strong-and the nodes on the sutural spiral, particularly on the specimen lrom the Gatun formation, are not as coarse as those of most Recent shells. In both features, however, a few Recent shells closely approach the fossils.
 Other fossils suggest that Turbo castaneus was living in the Miocene Caribbean Sea. A small incomplete strongly shouldered lamellar specimen from the middle Miocene Bowden formation of Jamaica is recorded as Turbo (Senectus) species (Woodring, 1928, p. 411). A strongly shouldered nonlamellar form, Turbo (Senectus) cf. castanes (Rutsch, 1934, p. 40, pl. 1, figs. 1, 2) occurs in the late Miocene Punta Gavilain formation of Venezuela. Turbo crenulatoides Maury (1917, p. 153, pl. 24, fig. 14), from the middle Miocene Cercado and Gurabo formations of the Dominican Republic, is sculptured with strong lamellae that extend from sutcre to base on the body whorl. It is doubtful, however, whether it can be differentiated from strongly lamellar Recent shells.
 Late Miocene deposits in western Florida yielded a strongly shouldered Turbo bearing a few lamellae on spirals below the shoulder on the later part of the body whorl. It was recorded as Turbo castaneus var. crenulates (Mansfield, 1930, p. 127, pl. 19, fig. 5). T. castaneus and T. castaneus var. crenulatus are recorded from the Pliocene Caloosalcatchie formation of Florida. I Occurrence: Middle part of Gatun formation (middle Miocene), eastern area, locality 155b. Toro limestone member of Chagres sandstone, (early Pliocene), locality 196.
 Family PHASIANELLIDAE
 When the family name Tricoliidae was used in 1928 (Woodring, 1928, p. 418), it was not intended as a new name. It was used under the impression that the name had been proposed or suggested: evidently the result of an erroneous interpretation, perhaps of Iredlae's (1924, p. 232) statement. At, all events the name is to be suppressed, for Tricolia appears to be properly referred to the family Phasianellidae.
 Genus Tricolia Risso
 Risso, Histoire naturelle des principles productions de
 lEurope n6ridionale, v. 4, p. 122, 1826.


Type (logotype, Gray, Zool. Soc. London Proc., p. 144, 1847):
 Turbo pdlus (Titrbo pullus Linn6), Recent, Mediterranean.
 (Gray cited the generic name as Tricolea.)
 Before the generic name Tricolia can be used it is necessary to dispose of Lamarck's name Phasianella (1804, p. 295). Though that name appeared in a publication on fossils from the vicinity of Paris and two Eocene species are the only ones that were described, Lamarck stated that he was naming the genus for a Recent shell, "faisan (phasianus)". Despite Lamarck's clear intention and although there is no doubt about the identification of the shell lie mentioned and partly described, he cited no references that could be used in fixing its Latin name. Therefore the view that faisan (=Bucciaum australis Gmelin) is the type by original designation (Woodring, 1928, p. 418, 419, footnote) is hardly admissible. I am indebted to H. A. Relcder for pointing out that the deficiency in Lacmarck's treatment was rectified within the next year by Roissy (1805 or 1806, p. 330), when he wrote "Le type de ce nouveau genre, que l'on doit encore h M1. de Lamarck, est une jolie coquille appelse/faisan, *.' He stated that this species is from New Holland and on the next page described it as Phasianella variegata, citing Buccinum tritonis Chemnitz in synonymy. This is an unequivocal type designation and it is irrelevant that Lamarck used only a vernacular name for the type species. The type of Phasianella therefore is P. variegate Roissy (=BBuccinum australis Gmelin). Roissy's action fortunately saves the traditional usage of Phasianella.
 Tricolia calypta Woodring, n. sp.
 Plate 15, figures 1, 2
 Of medium size, moderately inflated, spire high. Columellar lip and parietal callus thin. Umbilical groove narrow. Type showing curved strongly retraclive bands on later part of body whorl, bands standing out in slight relief on the somewhat altered and corroded shell, but iay originally ihave been color bands. Operculum unknown.
 Height 4.8 min, diacieter 3.1 imm (type).
 Type: USNM 561327.
 Type locality: 40a (USGS 2683, Vamos Vamos, off Palenquilla Point, Canal Zone, now submerged), marine ccember of Bohio(?) formation.
 The type and an additional specimen are in one of Hill's collections from Vanos Vamcos, and two others are in McIcDonald and Vaughan's collection from the same locality. The type is the only specihne that shows the retractive bands.
 The whorls of Tricolia calypta are less constricted at the suture than those of T. precursor (Dall) (1915, p. 94, pl. 12, fig. 5), and the species from Panami has a


AE TO TURRITELLIDAE


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