TWO NEW GOBIOID FISHES COLLECTED ON THE 

 PRESIDENTIAL CRUISE OF 1938 ' 



By ISAAC GINSBURG 

 U. S. Bureau of Fisheries 



Two very interesting species of fishes, an eleotrid and a gobiid, 

 which proved to he unknown to science, were collected during the 1938 

 Presidential cruise, on Old Providence Island. Both diverge from 

 the known species in their respective genera to a remarkable extent, 

 and present features that should prove to be of value in interpreting 

 the phylogenetic relationship of some species in this difficult and inter- 

 esting assemblage of related species. 



Numerical values of measurements stated in this paper refer to 

 percentages in standard length. The given length of a specimen repre- 

 sents the total length, including the caudal fin, unless otherwise stated. 



PYCNOMMA ROOSEVELTI, n. sp. 



Description. — Form elongate, body compressed, head conspicuously 

 depressed. Snout blunt, especially when viewed from dorsal aspect. 

 Mouth moderately oblique, terminal ; a horizontal through distal mar- 

 gin of upper lip approximately bisecting eye ; lower jaw slightly pro- 

 jecting. Maxillary medium, its posterior end approximately under 

 middle of eye. Interorbital narrow. Tongue free, broad, with a nearly 

 straight edge in front, only very slightly emarginate. Teeth in 3 rows, 

 those in outer and inner rows enlarged ; in upper jaw teeth in outer 

 row strongly enlarged, extending nearly to angle of mouth, inner 

 teeth moderately enlarged near symphysis only ; in lower jaw outer 

 enlarged teeth of about same size as outer teeth of upper jaw, nearly 

 confined to front, not extending far on side, inner row extending 

 about half the distance from symphysis to angle of mouth, the hind- 

 most 2 or 3 very strongly enlarged, caninoid, the middle row of 

 smaller teeth extending nearly to angle of mouth. No spine at angle 

 of preopercle. Scales extending forward to a vertical approximately 

 through origin of first dorsal, in about 26 oblique rows to base of 

 caudal (some of the scales missing and accurate count not possible) ; 



1 Published by permission of the U. S. Commissioner of Fisheries. 

 Smithsonian Miscellaneous Collections, Vol. 98, No. 14 



