GASTROPODS: TROCHIDAE TO TURRITELLIDAE


formation of Florida. Young shells of G. fscheri, up to a height of 13 millimeters, are narrowly umbilicated. With further growth the umbilicus is closed and the outer edge of the lobe is less well defined. A large incomplete specimen (diameter 60 mm) of G. fischeri has a very wide sheath, apparently almost completely covered by the thin lobe. Characters distinguishing the moderately large G. anguillana (Cooke) (1919, p. 123, pl. 4, figs. 9a, b; Anguilla formation, Anguilla) from G.fscheri are not evident. The type of G. anguillana has a very wide sheath; the umbilicus apparently is closed. G. streptostoma (Heilpris) (Dall, 1915, p. 107, pl. 12, fig. 27), from the Tampa limestone of Florida, like yo ng shells of fischeri, is narrowly umbilicated. The umbilicus persists, however, on the largest available specimen (height 30 millimeters).
 G. fscheri is the youngest Globularia in southeastern United States. In the Caribbean region the last representatives of the genus are found in slightly older strata: the Anguilla formation and its equivalents, which are correlated with the Tampa limestone.
 Occurrence: Middle member of Caimito formation (late Oligocene), Gatun Lake area, localities 56, 57, 57a. Culebra formation (early Miocene) Gaillard Cut, localities 99g (Globularia? cf. G.-fscheri), 100b.
 Subgenus Ampulella Cox
Cox, Royal Soc. Edinburgh Trans., v. 57, p. 38, 1931. Type (orthotype): Aopullaria depress Lamarck, Eocene, Paris
 basin.
 Ampulella, typical Ampullina of former usage, lacks the greatly expanded aperture and body whorl of Globularia s.s.
 Globularia (Ampulella) species
 Plate 15, figure 13
 Small, weakly shouldered, strongly inflated. Spire low, turreted. A narrow sloping to slightly concave shelf lies between suture and shoulder. Faint microscopic lineation visible on some specimens. Aperture moderately expanded. Umbilicus narrow. Sheath moderately wide. Lobe narrow, its outer edge indefinite below umbilicus.
 Height (incomplete) 21 mm, diameter (modified by dorso-ventral crushing) 19.3 mm (figured specimen).
 This small Globularia, evidently a new species, is represented by poorly preserved fossils from the marine member of the Bohio(?) formation of the Gatun Lake area. The umbilicus is not exposed on the figured specimen and the upper part of the sheath is missing. The outline suggests the Eocene Paris basin species Globularia parisiensis (d'Orbigny), which occurs also in the late Eocene and early Oligocene of England (Wrigley, 1946, p. 92, figs. 6, 9). G. parisiensis, how-


ever, has a wider sheath and axially arranged microscopic punctae.
 Occurrence: Marine member of Bohio(?) formation (late Eocene or early Oligocene) Gatun Lake area, localities 40a, 40d, 41.
 Globularia (Ampulella?) nana Woodring, n. sp.
 Plate 15, figures 3, 4
 Very small, strongly inflated. Spire high, faintly turreted. Upper part of body whorl sculptured with faint microscopic spirals, lower part with widely spaced spiral grooves. Umbilicus practically closed. Sheath not recognizable. Lobe forming a very wide everted columellar lip.
 Height (not quite complete) 7 mm, diameter 5 mm (type).
 Type: USNM 561361.
 Type locality: 42 (USGS 17692, northeast coast of Trinidad Island, Canal Zone), marine member of Bohio(?) formation.
 This minute globularine is fairly common in the Bohio(?) formation of Trinidad Island and occurs in the same formation near Palenquilla Point. The very wide everted columellar lip-that is, very wide for the size of the siell-widely spaced spiral grooves on the lower part of the body whorl, and minute size indicate that it represents an unnamed iinor subdivision of Globularia or Ampulella.
 Amaurellina garzaensis Vokes (1939, p. 173, pl. 22, figs. 9, 12, 16), a middle Eocene species from California, is of comparable size, but has a narrower columellar lip and relatively strong, evenly spaced spiral grooves.
 Occurrence: Marine member of Bolio(?) formation (late Eocene or early Oligocene), Gatun Lake area, localities 41, 42.
 Genus Amaurellina Fischer?
Fischer, Manuel de conchyliologie, p. 766, 1885. Type (monotype): Aiapullina spirata (Lamarck) (Acspullaria spirata Lamarck), Eocene, Paris Basin.
 Amaurellina? species
 Plate 14, figure 4
 Molds from limestone of the Gatuncillo formation are doubtfully referred to Asaurefina. They are large, strongly inflated, shouldered, and have a moderately high turreted spire. The wide space between the shoulder and the preceding whorl indicates a wide shelf or channel adjoining the suture.
 Height (incomplete) 53 mm, diameter 52 mm (largest specimen). Height (incomplete) 46 mm, diameter 38 mm (figured specimen).
 If these molds represent an Amaurellina, it is an exceptionally large species.


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