Jordan and Evcrinann. — Fishes of N'orth America. 2503 



vomer aud palatines ; caudal free from the dorsal and anal ; lower lip with- 

 out cirri; dorsal aud anal rays covered by the skin, ventrals each reduced 

 to a tilameut of 2 rays ; anal papilla of the male without horny claspers. 

 Small fishes of the tropical shores of America, living in rock pools aud 

 shaljows among algte. This geuus is closely allied to the East Indian genus 

 Dinemai'iclithys, differing in the absence of anal papilla and claspers aud 

 in the shorter vertical fins. (Named for J. Douglas Ogilby, the accom- 

 Xdished naturalist of the museum of Sydney, in recognition of his excel- 

 lent work on the fishes of Australia.) 



a. Snout very short, about 7 in head ; eye small, 10 or 11 in head ; scales small, obscure, 

 snout very short, 6J iu bead. VENTEALIs, 2874. 



aa. Snout longer, about 4 in bead ; eye about 8i in head ; scales larger, distinct. 



CAYOEUM, 2875. 

 2S74. 0(ilLBIA VEXTRALIS (GiU). 



Head 4i in body; depth 5^. D. 64; A. 50; scales about 100; eye 10 or 

 11 in head; maxillary 2; pectoral 1|; caudal Ig. Body elongate, moder- 

 ately compressed ; snout blunt, the profile behind snout nearly straiglit to 

 occiput; mouth large, the maxillary extending 2 or 3 times the eye's diam- 

 eter behind eye; teeth small, in bands on jaws, vomer, and palatines; eye 

 very small, nearer snout than posterior end of maxillary ; no cilia on snout 

 and chin; body apparently naked to the unaided eye; but body and top 

 of the head covered with small scales, which can be seen by the aid of a 

 lens. Origin of dorsal distant from tip of suout by a space contained 3^ 

 times in body ; front of anal about midway between tip of snout and base 

 of caudal ; tips of last dorsal and anal rays reaching about to the middle 

 of caudal rays, but not connected; pectorals scarcely reaching midway 

 between their base and the front of anal; ventrals filamentous; caudal 

 slender and rounded behind. Color iu spirits, light brown above, lighter 

 below; fins all colorless; without distinct marking anywhere. Gulf of 

 California ; not rare in rock pools ; several s])ecimens, 2 to 4 inches in length 

 taken by us at Mazatlau. Here described from a specimen, 2 inches in 

 length, from La Paz Harbor, Lower California, {centralis, pertaining to 

 the belly.) 



Brosmojilu/cis ventralis, Gill, Proc. Ac. Sci. Phila. 1863, 253, Cape San Lucas. (Coll. 



Xautus.) 

 Dineinatichthys ventralis, Joed AN, Proc. Cal. Ac. Sci. 1895, 502, pi. 54. 



2875. OGILBIA CATORIIM, Evermann &. Kendall. 



Head 4; depth 4^; eye 8^; snout 4. D. about 68; A. about 50; scales 

 about 14-87-13; maxillary 1|; pectoral 1*; ventral 1^; caudal 2^. Body 

 moderately elougate, compressed; head moderate, snout blunt; mouth 

 large, jaws subequal, maxillary extending beyond vertical of eye a dis- 

 tance nearly equal to length of snout; eye very small, high up, situated 

 in anterior third of head; nostril small, close to eye; teeth small, in bands 

 on jaws, vomer, and palatines; back elevated, strongly arched from snout 

 to origin of dorsal fin, thence descending in a nearly straight line to base 

 of caudal; ventral outline comparatively straight, slightly concave at 

 front of anal. Dorsal and anal long and low, distinct from caudal, the 



