ART. 20 NEW AND IMPERFECTLY KNOWN FISHES GINSBURG 15 



lengthwise row of small dark spots above the median line of the body, 

 continued on the upper aspect of the head, the row extending from 

 the preopercle nearly to base of the caudal. 



Remarks. — This species may be readily recognized by its pecuHar 

 coloration, as well as the distinctive structural characters. The above 

 account is based on the type and on the two specimens from Agua 

 Verde Bay recorded by Osburn and Nichols, the total length of the 

 three specimens ranging from 34 to 41 mm. 



Genus GOBIOSOMA Girard 



GOBIOSOMA ROBUSTUM, new species 



Description of type. — No scales on caudal. Mental frenum not 

 bilobed. D. 7-12. A. 10. Body quite short and stocky. Head 

 moderately depressed, depth behind eye 1.7 in its length. Cheeks 

 tumid. Mouth oblique, lower jaw but slightly included, nearly co- 

 terminal with upper jaw; Ups fleshy. Maxillary reaching to a ver- 

 tical through posterior margin of pupil. Teeth in bands, outer and 

 inner rows of both jaws, considerably enlarged. Anterior nostril 

 ending in a short tubule; posterior nostril with its rim slightly raised. 

 Barbule in front of eye not evident. Base of ventral and that of 

 pectoral nearly on same vertical; origin of first dorsal at some distance 

 behind this. Tip of pectoral not quite reaching to a vertical through 

 origin of second dorsal. Ventral of medium length, 1.5 in distance 

 from its origin to origin of anal, 21 per cent of body length. Origin 

 of second dorsal but slightly in advance of that of anal; end of anal 

 under base of third dorsal ray from its end. Tips of posterior dorsal 

 rays reaching base of caudal, those of anal not reaching quite that 

 far. Membrane from last dorsal ray closely adherent to back, the 

 normal position of that ray being nearly horizontal. 



Measurements. — Total length, 55.5. Standard length, 45. Depth 

 of body, 11.4 (25.3) ; least depth of caudal peduncle, 7 (15.6) ; depth 

 of head du-ectly behind eye, 8. (17.8); length of head, 13.6 (30.2); 

 maxillary, 6 (13.3); snout, 4 (8.9); eye, 3 (6.7); interorbital, soft 

 part, 3.5 (7.8); postorbital part of head, 8.7 (19.3); antedorsal dis- 

 tance, 15.7 (34.9); ventral, 9.6 (21.3); pectoral, 10.9 (24.2); caudal, 

 10.6 (23.5); distance from ventral to anal origins, 14.5 (32.2). 



Color. — Body crossbarred with nine broader brown bands, alter- 

 nated with narrower, lighter bars; the alternating bands and bars 

 not sharply differentiated; the brown bands not uniformly colored, 

 mottled with lighter and darker shades; the lighter crossbars not 

 altogether straight, more or less sinuous or obUque, sometimes incom- 

 plete. A median row of small brown spots, distinct, one on a brown 

 band, sometimes two. Fins nearly uniformly dusky, ventral and first 

 dorsal darkest, the latter somewhat blotched with black. 



