30 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



fiDed liue along' middle of sides; back with live or six blackish cross- 

 bars from back to middle of sides, below wliicli they extend in five or six 

 short V-sLaped projections ; a short brown streak backwards aud down- 

 wards from eye ; a small brown bar obliquely across base of upper pec- 

 toral rays: a broad jet-black bar across base of caudal, not includiug 

 uppermost aud lowermost caudal rays. 



A single specimen 1 inch in length was taken from a cavity of a 

 sponge at Key West. It is possible that it should be regarded as the 

 type of a genus distinguished from Gobiosoma by the presence of the 

 small mental barbels. 



8. Cremnobates nox. 



Snout not very acute, the upper and lower profiles of head nearly 

 evenly convex ; mouth large, maxillary reaching slightly beyond eye, 

 one-half length of head. Eye large, equaling length of snout, greater 

 than in terorbital width, 4 in head (to end of opercular spine) ; interorbital 

 width, 4f in head; nasal, supraorbital and occipital tentacles present; 

 those on snout aud above the orbits, simijle, slender filaments, the latter 

 about as long as diameter of orbit, one of them divided to the base, the 

 other simple ; the tentacle on each side of nape is a comjiressed slip of 

 skin higher than wide, the margin uneven but not fringed. 



Anterior dorsal spines not much elevated, not higher thansomeof the 

 posterior spines ; the first and second spine about equal, 2iin head; the 

 third spine is shorter, about equal in length to the fourth, from which it 

 is separated by a wide membrane, which is, however, notat all notched. 

 The spines thence increase in length toward the last. Caudal 1^ in 

 head; pectorals reaching anal, nearly equaling length of head; ven- 

 trals not reaching vent, 1^ in head. 



Scales large, 4 series above lateral line aud 4 below. 



Head 3f in length; depth 3%. D. 111+ XXVII; A. II, 18. Lat. 1. 34 

 (tubes). 



COLOE. — Body and fins uniform blackish brown ; a few small sil- 

 very-white specks on dorsal region, mostly along base of dorsal fin ; 

 head and base of pectoral fin with light pink areas and mottliugs; 

 snout pink above; nape with a pink cross-bar; a dark streak uj) wards 

 and backwards from ej'e to nape ; a light streak from eye backwards 

 to opercle and one backwards aud downwards ; lower jaw mottled with 

 light and dark. A small round, black spot, near base of dorsal be- 

 tween twenty-third and twenty-fifth si)ines, aud one between twenty- 

 eighth and thirtieth, both very faintly ocellated with lighter. Slight 

 whitioh tips on ventrals aud lower edge of caudal. 



This species is known from a single specimen. If inches long, taken 

 with the seine in algas on a rocky bottom at Key West. Its conge- 

 ners, C. marmoratns Steind., C.faseiatus Steind., and G. affinis Steind., 

 were found in the same waters, G. marmoratus being much the most 

 abundant of the four, and reaching the largesfe^ze. 



