156 M'.W SPECIES OF FISHES, GULF OF CALIFORNIA. 



by the absence of tentacles about the head, the presence of two dorsal 

 ocelli instead of one, the absence of any membrane connecting the two 

 dorsal lins, the presence of a terminal dorsal soft ray, and in the greater 

 namber of scales in the lateral line. 



Prom .1. altivelis (Lockington)* it differs in the greater length of the 

 head, the smaller scales, and the position of the dorsal ocelli, which in 

 altive1i8 are upon the fourth and twenty-fourth and twenty -fifth rays 

 instead of the twelfth and thirteenth, and twenty-third, and twenty- 

 fourth spines. From Mr. Lockington's description it seems that, in alti- 

 velis, there are no detached dorsal spines, which is another important 

 difference. 



From A. integripinnis (Rosa Smith)t it differs in the two distinct 

 dorsals, the presence of two dorsal ocelli, as well as in other less im- 

 portant points. 



17. Psednoblennius hypacanthus. gen. et sp. nov. {family Blenniidce). (Type, 

 No. 39638, U.S.N.M.) 



Eead, 4§ in length to base of caudal (5 in total); depth, 7(8); eye, 4, 

 = snout ; B. (J ; L). Ill, 34; A. L'7. 



Body greatly compressed, moderately elongate, its depth but eight 

 times in total length ; head short, snout blunt, about equal toeye; anteor- 

 bital profile very steep, gently rounded from front of eye to first dorsal, 

 from there nearly straight to caudal ; ventral liue nearly straight. Body 

 naked, no membranous appendages. Mouth large, horizoutal, jaws 

 subequal, extending to beyond middle of eye. Teeth in a single series 

 in both jaws, well developed, pretty uniform in size, slightly projecting 

 backward ; vomer and palatines apparently smooth. Eye large, equal 

 to twice interorbital space, high up. Dorsal fins two, the first of 

 three very slender, tlexible spines, hard to distinguish from soft rays. 

 but they do not appear to be at all jointed. This fin is inserted upon 

 the nape immediately above the posterior edge of the preopercle, and a 

 distance in front of second dorsal nearly equal to the length of the 

 snout : its very soft spines equal in length the distance from end of 

 snout to posterior rim of orbit. The second dorsal begins directly over 

 the origin of the pectorals and extends to the caudal, with which it is 

 Blightly connected. The first few rays of the second dorsal are very 

 weak, flexible spines, the last few are pretty evidently soft, jointed rays, 

 while the intermediate ones are not distinguishable as definite spines 

 or soft rays — in short, there seems to be a gradual change from 

 spines to soft lays from the anterior to the posterior part of the tin. 

 This character, if we mistake not, is entirely unique. The fin is of 

 nearly uniform height, the rays about equaling those of the first dor- 

 sal in length. The anal is similar to tin; second dorsal in shape and 

 height but is much shorter, its origin being much behind that of the 

 second dorsal or ne nly half way from the snout to the base of the cau- 



mnobales allicelia Lockiugton, Proc. Acad. Nat. Sci. Phila., 1881, pp. 116-118. 

 ■i remnobates integripinnis Rosa Smith, Proc. U. S. Nat. Mus., 18-30, 147-149. 



