GILBERT: FISHES OF THE SUBGENUS LUXILUS


specimen as "type," and the similarity in quality of preservation of
specimens from the ANSP and USNM series strongly indicate that
they were collected at the same time. Therefore, I think it logical to
assume that the National Museum specimen is from Cope's original
type series, and I hereby designate it as a lectotype of Hypsilepis
coccogenis. The lectotype specimen is well preserved and is typical
of N. coccogenis. Following are the more important meristic counts:
anterior dorso-lateral scales 16; circumferential scales 14-2-10; lateral-
line scales 39; caudal peduncle scales 7-2-6; pectoral rays 15 on each
side; anal rays 9; pharyngeal teeth 2,4-4,2.
 An examination of the syntypes in the Academy of Natural Sciences
revealed they actually comprise five species. In addition to 90 para-
types of Hypsilepis coccogenis which have been recatalogued as ANSP
3561-3650, the following are also present: Notropis ariommus (6 speci-
mens)-ANSP 3651-3656; Notropis rubricroceus (2 specimens)-
ANSP 3657-3658; Notropis chrysocephalus chrysocephalus (1 speci-
men)-ANSP 3659; Notropis galacturus (1 specimen)-ANSP 8660.
 DIAGNOSIS. An attenuate and terete, moderately large species of
Luxilus, reaching 116 mm SL (Fowler, 1936: 192). Notropis cocco-
genis differs from other members of its subgenus, except N. zonistius,
in the following characters: 2 to 3 rows of nuptial tubercles on lower
jaw, extending to tip of chin (figure 14D); dorso-lateral scales out-
lined with dark pigment; peritoneum speckled with dark pigment, not
appearing uniformly black. N. coccogenis is unique among forms of
Luxilus in having: outer third of dorsal fin with a moderately oblique
band which nearly parallels distal edge of fin; lower two-thirds of
dorsal fin yellowish; a wide black border on posterior edge of caudal
fin; a red maxillary spot; a prominent red bar at margin of opercle
and preopercle; nuptial tubercles present on side and tip of snout,
absent from top of head and back; an extremely well-developed black
scapular bar; lower jaw usually projecting slightly.
 A comparison of N. coccogenis and N. zonistius is presented in
table 1.
 DESCRIPTION. Fin ray and scale row counts and proportional
measurements are listed in tables 4 and 9 to 15. Characters men-
tioned in the diagnosis are not repeated in the following description:
 Angle of mouth to top of head usually 500 to 520 (range 46 to
550); anterior dorso-lateral scales 15 to 18 (19); circumferential scales
25 to 29 (32) (relative distribution of circumferential scales usually 13
to 15-2-10 to 12; range 13-2-10 to 17-2-13); sum of anterior dorso-
lateral and circumferential scales (40) 41 to 46 (50); caudal peduncle
scales 14 to 16, usually 15; anal rays (8) 9 or 10, usually 9; pectoral


1964