170 PROCEEDINGS OF THE ACADEMY OF [Feb., 



On the anterior portion of the liocly the series are close together, 

 broadening out behind so that some above run up toward the middle of 

 the back, ami some of tlie lower run toward the lower median line. 

 On the chest the scales are small and only slightly keeled. On each 

 lower side of the caudal pedunc'e are a series of three enlarged com- 

 pressed scales. The keels on the scales, in this region, are also large. 

 Base of the caudal above and below with elongate compressed scales. 

 Bases of the other fins without any scales. 



First dorsal spine situated at the angle of the nuchal shield, a little 

 before the gill-opening. Second dorsal spine short, nearer the third 

 than the first. Third dorsal spine a little nearer the posterior margin 

 of the orbit than the origin of the soft dorsal, and with the remaining 

 spines all graduated to the last wliich arc ver}- short. Origin of the 

 soft dorsal a little nearer the base of the first dorsal spine than the base 

 of the caudal, and the anterior rays the highest. Anal inserted a 

 little nearer the l^ase of the caudal than the base of the ventrals, 

 and the second ray about equal to the length of the caudal peduncle. 

 Caudal small, lunate. Pectoral long, reaching beyond the base of 

 the caudal. A entrals close together, elongate, and reaching the anus, 

 which is a little distance in advance of the origin of the anal. 



Color in alcohol brown, a little darker above. Back with four 

 broad obscure saddle-like bands. A dark brown band connecting the 

 eyes and continued down below on each cheek. First dorsal spine with 

 a blackish membrane. Other dorsal fins dusky with obscin-e dark 

 brown cross-bars. Anal and ventral pale brown. Caudal barred 

 with brown. Pectoral blackish with obscure gray and dusky blotches. 



Length 4 inches. 



One example. 



BLENNIID^.' 

 7. Aspidontus tractus sp. nov. Plate VII 



Head 3f ; depth 5; D. XI. 28; A. 26: P. 14; V. 3: width of head 2yV 

 in its length; depth of head ly%; snout 3i; eye 4^; width of mouth 4|-; 



■' Graviceps, gen. nov. 



The genus Aspidontus as here understood includes but two species, the one 

 described above and .4. iwniatus Quoy and Gaimard. The species included by 

 Jordan and Snyder in their review of the Blennioid fishes of Japan (Proc. U. S. 

 Nat. Mus., XXV, 1902, pp. 453 to 458) appear to form a separate genus. They 

 are all easilj' distinguished bj- the short blunt snovit, which is not produced or 

 pig-like. 



Type Petroscirtes elegans Stcindachner. 



{Grai'iceps, heavy-head.) 



