240 BULLETIN 188, UNITED STATES NATIONAL MUSEUM 



tliree specimens 14.2 to 15.8 cm. long were taken. The outstanding 

 feature is a narrow dark brown or black band extending from the 

 head to the tips of the median caudal rays, with each scale of the back 

 and of the side as low as the base of the ventral fin having a dark brown 

 or black basal crescent. 



The recording (Fowler, 1935a) of the pharyngeal teeth on one side 

 in four rows (5, 5, 4, 2) is unexpected, as in this genus and in Tijlog- 

 nathus these teeth are normally triserial. ,.,r{ 



The differences that appear to separate this species from L. nigro- 

 vittatus are indicated under the discussion of the latter. 



LOBOCHEILUS NIGROVITTATUS, new species 

 FiGUEE 43 



DescriptAon. — Depth of body 4.12 in standard length; least depth 

 of caudal peduncle 2 in its length and in head; profile from tip of 

 snout to dorsal fin very slightly curved; head 4.5 in standard length, 

 its depth at nape slightl^^ greater than its width at opercles; snout 

 broadly rounded, 1.4 in length of head and equal to the moderately 

 convex interorbital space; snout from tip to a point under nostrils 



Figure t3. — Lobocheilus nigrovittatus, new species: Type (U.S.N.M. No. 109772). 

 Drawn by Mrs. Aime M. Awl. 



covered with large tubercles arranged in 2 groups of 2 rows each 

 separated by a deep groove ; mouth wide, extending nearly full width 

 of head, overhung by the snout for a distance equal to diameter of 

 eye ; upper lip smooth ; large suiDerficial lobe of lower lip with a broad 

 edge of papillae and covering the conspicuous horny sheath of the 

 lower jaw, with the inner part of the lower lip small and attached 

 laterally to the inner base of the lobed portion; a pair of maxillary 

 barbels less than 0.5 diameter of eye; eye small, in midlength of head, 

 4.5 in head, 2 in snout, 2.25 in interorbital space; pharyngeal teeth 

 5, 4, 2—2, 4, 5, small, compact, with narrow grinding surface; gill- 

 rakers short, club-shaped, closely approximated, 8 + 31 on first arch. 



