BULLETIN. 



DESCRIPTION OF A NEW SPECIES OF SQUALIUS. 



BY ROSA SMITH. 



Squalius lemmoni. 



Head, 3| (4£); depth, 3| (4f); length, 5| inches; D, 8; 

 A, 8. 



Body not much compressed, but rather slender; the dor- 

 sal and ventral outlines about equally arched. Head sub- 

 conical, little compressed, nearly as wide as deep, and flat 

 on top; maxillary oblique, reaching front of eye, lower jaw 

 barely included; diameter of eye not quite equal to snout, 

 1|- in interorbital space, 4 J in head. Teeth, 2, 5 — 4, 2, with 

 evident grinding surface on three in the greater row. Pseu- 

 dobranchise present. Isthmus narrow. 



Scales, 68. Lateral line decurved, but not strongly. 

 Scales largest on sides anteriorly; much smaller on dorsal 

 and ventral surfaces. Scales not very firm, a few rubbed off 

 from each of the four examples studied. Insertion of dor- 

 sal fin very slightly behind ventrals, nearer snout than base 

 of caudal. Pectorals, If in head; ventrals 2 in head, very 

 nearly reaching vent. Depth of caudal peduncle 2 in its 

 length. 



Color generally smutty. Top of head, from tip of snout 

 to occiput, evenly bluish black, sharply separating the head 

 from the trunk; a median blackish streak from occiput to 

 base of caudal, paler behind dorsal. A leaden band about 

 as wide as eye from upper angle of opercle to base of caudal, 

 running higher than the lateral line except at its posterior 

 fourth, where it is upon the lateral line. Sides of head and 

 body dusky from numerous dark punctulations. Below plain 

 white from chin to insertion of anal. Fins all dusky. Peri- 

 toneum blackish. 



