1888.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 157 



clal ; posteriorly it extends cotermiQonsly with the dorsal, and, like it, is 

 slightly joined to the caudal fin. Caudal fin apparently rounded, fan- 

 shaped, bat its shape can not be exactly made out, as some of its rays 

 are broken off. 



The pectorals are inserted below the axis of the body, directly over 

 the ventrals; their length about three-fourths that of head. Ventrals 

 of two rays, inserted under the pectorals, about equal to pectorals in 

 length. The body is entirely scaleless. Coloration (in alcohol), pale, mot- 

 tled with fine dark points so arranged as to inclose circular areas with 

 fewer spots ; a long dark blotch behind the axil, inclining downward and 

 backward; head covered with similar punctulatious ; opercles dusky; 

 chin with two dark cross-lines, separated by one of white, extending 

 onto upper jaw on each side; top of head with a purple spot; sides 

 with a series of about six short black lines, the last broadest and 

 plainest ; base of caudal with a distinct black blotch. First dorsal quite 

 dark, almost black; second dorsal with about eight pretty well defined 

 dark blotches at its base, rest of fin with numerous dark spots of 

 different sizes; anal with about twelve dark blotches extending some- 

 what regularly from the base slightly forward, these separated by plain 

 unmarked spaces of a little greater width; caudal sparingly marked 

 with dark points arranged in wavy cross-bars ; pectorals and ventrals 

 unmarked. 



A single specimen, 40 mm long, was obtained by us from a shallow arm 

 of the bay at Guaymas. 



The species evidently belongs in the family Blenniidw and would seem 

 to be related to the genus Pholidichthys Bleeker. The many important 

 points iu which it differs from this genus, as well as from all other genera 

 that are at all related to it, seem to us to necessitate its being made the 

 type of a new genus, Psednoblennius, the characters of which are included 

 in the foregoing description. (*Fedv6<; = naked; (iUvvos = blenuy.) 



18. Citharichthys gilberti, sp. uov. (Type, No. 39627, U. S. N. M.) 



Head, 3.5 in length of body to base of the caudal; the depth of head 

 4 in body; width of head, 20; depth of body, 1.9 in length; thickness 

 of disc, 11.8 in length of body; dorsal, 78; anal, 57 ; scales, 18 — 46 — 19. 



Body comparatively broad ; the greatest depth is under the middle of 

 the dorsal; the two profiles about equally arched ; the snout slightly 

 longer than the longest diameter of the eye, and without a distinct spine. 



Eyes on the left side, equal in size, small, 5.7 in head; iuterorbital 

 space narrow, 19 in head, low, slightly grooved, and scaled on posterior 

 portion only. 



Maxillary, 2.4 in head, reaching barely to posterior border of the eye, 

 upper jaw projecting. 



Teeth small, in a single series; none on the vomer. 



Gill-rakers on anterior arch 4—13, not strong, with a rather broad 

 base, quickly narrowing to a slender stalk, much weaker on second and 

 third arches ; obsolete on posterior arch. 



