66 CALIFORNIA ACADEMY OF SCIENCES. 



42. Gobius hemigymnus spec. nov. 



No. 27,124, one specimen, 1% inches. Dredged in the West Indies. 



Head 3| in length, (dj in total); depth 4| (5^); D VI— 10; 

 A 8. Scales smaller than in G. paradoxus, 17 series devel- 

 oped, 7 in a cross series on tail — fewer further forward. 



Body compressed; depressed anteriorly, the greatest 

 depth in this specimen being at the origin of the anal and 

 second dorsal fins. Head wider than deep, rounded; pro- 

 file much decurved from eye to mouth as in paradoxus; eye 

 perfectly round, smaller than in. paradoxus, 1\ in the rounded 

 snout, 5 in head; interorbital space scarcely wider than 

 orbit; mouth somewhat oblique, larger than in 'paradoxus, 

 the maxillary reaching beyond posterior rim of orbit; lower 

 jaw slightly shorter than the upper; teeth in the upper jaw 

 in a band, the outer series remote, and the teeth several 

 times as large as in the inner row, all more or less movable; 

 teeth in the lower jaw similar, a recurved canine on each 

 side near the front. 



Scales very weakly ctenoid, covering only the sides of the 

 posterior half of the body, not extending quite to base of 

 dorsal or anal fins even at their posterior insertion, the 

 upper and lower edges of the caudal peduncle being like- 

 wise free from scales, the scaly region, however, being 

 widest on the peduncle, and tapering forward to the central 

 point opposite beginning of anal, where the scales are 

 smallest. 



First spine of the dorsal not elongate as in paradoxus, 1^ 

 in head, the 3d, 4th and 5th spines slightly exceeding 

 the first in height, equalling the posterior rays of soft dor- 

 sal, which are little higher than the anterior rays of the soft 

 dorsal; caudal rounded, about 4 in length of body, 1^ in 

 head; ventral not reaching vent, i^ in head; pectorals 

 rounded, rather short and broad, 1| in head. 



Color light olivaceous, without distinct markings, every- 

 where with minute dark punctulations; eight faint cross 



