NO. 14 TWO NEW GOBIOID FISHES GINSBURG 5 



where rays split to form narrow branches. Anal with a supramargi- 

 nal, black, diffuse band ; rest of fin and other fins more or less dusky, 

 the 2 dorsals darkest. 



Measurements. — Female 14 mm. in standard length. Ventral 21.5, 

 depth 23, least depth of caudal peduncle 13.5, head 27, postorbital part 

 of head 18, head depth directly behind eye 16.5, head width at same 

 point 14.5, maxillary 12, snout 7, eye 8, antedorsal distance 38. Caudal 

 in a male 19 mm., 23.5. 



Holotypc. — U.S.N.M. no. 107291 ; Old Providence Island ; Au- 

 gust 6, 1938, obtained on the Presidential cruise ; W. L. Schmitt col- 

 lector ; male 19 mm. 



Paratypes. — Female 14 mm. in standard length, obtained with the 

 type. Bingham Oceanographic Collection : Barahona Harbor, Santo 

 Domingo; John C. Armstrong; July 13, 1933; female 13 mm. in 

 standard length. 



The specimen from Santo Domingo differs somewhat in color from 

 the two from Old Providence Island. There is no trace of cross- 

 bands. The prevailing color is considerably darker. It is almost uni- 

 formly dark all over, except a large conspicuously lighter area on 

 side and underside of the belly. The lighter area is abruptly delimited 

 from the dark shade on the back ; the line of demarcation is a longi- 

 tudinal through the upper angle of the pectoral. However, in the num- 

 ber of fin rays, the distinctive spotting on the caudal, and its general 

 shape and appearance it agrees with the other 2 specimens. The scales 

 are nearly all missing, but the traces of scale pockets left show that 

 the extent of squamation is about the same as in those 2 specimens. 

 It is apparently conspecific with them. 



Distinctive characters and relationship. — This species shows a com- 

 paratively high degree of divergence from Garmannia paradox a 

 (Giinther), the genotype, and the two are evidently relatively remote 

 in their relationship. G. gemmata differs strikingly in having the 

 squamation much less extensive and in having a compressed, instead 

 of a depressed, head. Striking differences are also found in the lateral 

 line organs. These structures which have been hitherto neglected in 

 studies of the American gobies will be considered in a systematic man- 

 ner in a later paper. The new species differs from paradoxa also in 

 having fewer pectoral rays. 



