FISHES OF WEST COAST OF PERU. 143 



Genus LEPISOMA DeKay. 



KET XO SPECIES. 



a\ D. XVII-XIX, 11-13 ; A. II, 19-21. 



6\ Color variable, typical examples with brown or black spots and dark 

 cross-bands. 

 &. Scales (pores) about 65; an outer row of enlarged conical canines inter- 

 mingled with small teeth on vomer and palatines ; normal fin counts 



D. XVIII, 12 or 13; A. II, 19 a;oii^i, p. 143. 



c*. Scales (pores) 69 to 73; teeth on vomer and palatines in three patches, 

 teeth of each patch of nearly uniform size ; normal fin counts D. 



XIX, 13; A. II, 19 or 20 ^/iiHppi, p. 144. 



6^ Color plain blackish brown or grayish brown peruviana, p. 145. 



ol D. XXV or XXVI, 11 or 12 ; A. II, 22 or 23 microcirrhis, p. 146. 



171. LEPISOMA XANTI (Gill). 



TRAMBOLLO. 



Lahrosomus xanti Gill, Proc. Acad. Nat. Sci. Phila., 1860, p. 107 ; Cerro 



Blanco. 

 Labrisomus xanti Jokdan and E\:eemann, Fishes North and Mid. Amer., 



vol. 3, 1898, p. 2362. 



One specimen, field No. 09498, 14.2 cm. in length, from Lobos de 

 Afuera. 



Head 3.15 in length; depth 3.74; eye 5.1 in head; snout 3.54; 

 maxillary 2.15 ; interorbital 7.8 ; pectoral 1.26 ; D. XVII, 13 ; A. II, 

 19; scales (pores) 65. 



Body compressed ; head somewhat pointed, not so robust as in the 

 types without scales; mouth large, the maxillary reaching vertical 

 from center of eye; jaws with an outer row of enlarged canine-like 

 teeth, those on sides becoming gradually smaller; behind these are 

 bands of villiform teeth; teeth on vomer in a A -shaped area, main 

 series with 4 enlarged canines, between and behind which are smaller 

 teeth; a patch of teeth on each palatine bone as in the type except 

 that the outer series consists of smaller teeth, more nearly equaling 

 in size those behind them; nuchal filaments well developed. 



Dorsal spines of nearly uniform height, shorter than the soft rays, 

 membrane of last ray practically reaching base of caudal; caudal 

 small, rounded, of about 14 rays; insertion of anal midway between 

 tip of snout and base of caudal, posterior rays longest; ventrals nar- 

 row, 1.5 in head; pectoral broad. 



Color in alcohol (much faded) brownish, without spots, showing 

 none of the characteristic markings of the species in its present 

 condition. 



