FISHES OF SINALOA. 477 



Body compressed, ovate; profile convex; mouth wide, 

 lower jaw included; teeth in a single row and movable; 

 gill-rakers small and numerous; head entirely scaled; 

 scales on body large 3-30-9; scales running well up on 

 fins; lateral line high, ending under last dorsal ray. 



Color: Body divided into two parts by a line from the 

 opercular flap to posterior end of soft dorsal, below this line 

 it is rich, bright yellow, above it is sky blue, darker on 

 head, with brilliant sky blue spots; a chain of these spots 

 following the suborbitals below eye; a spot at angle of 

 mouth, two converging lines of spots more or less run 

 together from tip of snout to upper edge of orbit, each 

 scale on nape with a spot and a few scattering spots on 

 opercle; scales on upper part of body edged with dark; 

 a dark spot on caudal peduncle anteriorly edged with sky 

 blue; fins all more or less dusky except anal and ventrals, 

 which are white and edged with black. 



176. Microspathodon dorsalis (Gill). (Pomacentrus 

 guadrigutta Gill.) 



A single specimen 4 inches in length was obtained in a 

 rock pool on the Peninsula called Vijia, by Mr. George 

 B. Culver. 



This specimen corresponds almost perfectly to Dr. Gill's 

 account of Pomata^rion dorsalis. A smaller specimen 

 entirely similar was also obtained. The distinctions be- 

 tween this species and Microspathodon bairdii are con- 

 stant though slight. 



Head 3; depth i|; D. XII, 16; A. II, 12; scales 3- 

 28-10; eye 2)^ in head; snout 4; D. lobe i; C. lobe 

 equals head; P. ij^ ; V. equals head. 



Body compressed, the profile rounded, depressed before 

 eye so that snout projects. Gill-rakers numerous, very 

 short, slender, close set. Preorbital deep. Preorbital 

 and preopercle entire. Teeth in a single row, movable. 



