NO. 7 GINSBURG : NEW SPECIES OF GOBIOID FISHES 113 



two lower rows, characteristically lighter in the center, darker around 

 the periphery; a row of eight rather diffuse, elongate blotches saddled 

 on back from origin of first dorsal to base of caudal; dorsal aspect of 

 nape with five irregular longitudinal rows of small, more or less elon- 

 gate spots ; side of head with three lengthwise bands ; a band on a line 

 with middle of eye, usually somewhat interrupted and nearly continuous 

 with fourth from lowermost row of spots on body; a band from lower 

 posterior margin of eye running somewhat obliquely to upper posterior 

 part of opercle; a third band from posterior end of maxillary, some- 

 what converging posteriorly with, but not meeting, middle band; two 

 or three blotches in a row, one behind the other, on upper part of 

 pectoral and its fleshy base, directly behind the bands, sometimes the 

 bands and blotches nearly continuous; a similar blotch on lower part of 

 fleshy base; a sharply marked, very dark spot on base of caudal, directly 

 below the median line; a very faint smudge over it, above the median 

 line; fins more or less dusky, without spots, pectoral lightest. 



Holotype. — In U. S. Nat. Mus. San Jose Island, Pearl Islands, 

 Panama; in tide pools; March 15, 1937; S. F. Hildebrand; male 

 41 mm. 



Paratypes. — 4 males 35-42 mm., 3 females 34-37 mm; obtained 

 with the type. I wish to take this opportunity to express my sincere 

 thanks to Dr. Hildebrand for turning over to me for study, the Gobii- 

 dae obtained during 1935 and 1937 as a result of and incidental to his 

 studies of the fish fauna of the Panama Canal locks. 



I also examined one small specimen, 23 mm., in the Hancock collec- 

 tion. It is in bad condition but appears to belong to this species. Its fin 

 ray counts are D. 10, A. 10, P. 20. The characteristic spot on the lower 

 part of the caudal base is present. Feeble traces of the general color 

 pattern as described above are discernible. The data for this specimen 

 are: Tiburon Island, Gulf of California; March 28, 1937. 



Distinctive characters and relationship. — Of the two known species 

 of its genus, urospilus differs from (Gobius) Coryphopterus nicholsii 

 (Bean) in having fewer rays in the dorsal, anal and pectoral and in 

 lacking a black band on the distal margin of the first dorsal. It is evi- 

 dently most nearly related to and agrees with Coryphopterus glauco- 

 frenum Gill in the fin ray counts and the form of the head and body. 

 It differs in having the predorsal fleshy ridge poorly developed or nearly 

 obsolescent, and in color. The color pattern is similar in both, but the 

 differences are striking on direct comparison. The spots in the longi- 



