PTERELEOTRIS 83 



Genoa 19. PTERELEOTRIS Gill 



Ptereleotris GILL, Proc. Acad. Nat. Sci. Phila. 15 (1863) 271. 



Dorsal VI, 1-24 to 32; anal I, 24 to 32, the scales minute, 

 cycloid, 150 to 170 in a longitudinal series; the sides of head 

 naked; the caudal mostly scaled. 



The body elongate, laterally compressed, not elevated, eyes 

 large, mouth curved and oblique; the upper jaw has three rows 

 of teeth, the outer one much larger than the others; the prom- 

 inent lower jaw has one or two pairs of canines near the sym- 

 physis, the rest of the teeth small to minute; the gill openings 

 separated by a wide isthmus ; the lunate caudal as long as head ; 

 the dorsal and anal rays all undivided. 



33. PTERELEOTRIS DISPERSUS sp. nor. 



PLATE 6, FIG. 3 



Dorsal VI, 1-24 to 25 ; anal I, 24 ; there are about 154 scales 

 hi a longitudinal series and about 42 in a transverse series. 



The dorsal profile of the elongate, compressed body forms an 

 almost straight line from occiput to caudal fin; the ventral 

 profile gently curved, the greatest depth of body 6 times in its 

 length; the head 4.5 times in length; the full, circular eye high 

 up, its diameter 3.6 times in head, a little greater than the 

 blunt snout which goes 4 times in head; the interorbital space 

 a little more than an eye diameter and contained 3.2 times in 

 head ; the strongly curved, oblique mouth of moderate size, with 

 a projecting lower jaw ; the posterior extremity of the maxillary 

 under front margin of eye; three rows of teeth in upper jaw, 

 the outer one of large, conical, rather widely spaced teeth, the 

 other rows of very small teeth ; two pairs of canines near sym- 

 physis in lower jaw, with a few very small teeth behind these; 

 between and in front of the canines some similar but much 

 smaller teeth; the nostrils small and high up; the caudal pe- 

 duncle short and deep, its depth f more than its length; the 

 pectorals of moderate size and approximately equal to the slender 

 ventrals; the third dorsal spine longest, equal to or slightly 

 exceeding depth ; the tips of spines all elongated ; the soft dorsal 

 and anal both long and of similar shape; their anterior rays 

 longest and equal to depth ; the caudal lunate, and equal to head 

 in length. 



The entire body covered with very small cycloid scales, which 

 extend forward on top of head as far as the line between opercle 

 and preopercle; the remainder of head and the isthmus naked; 



