1910.] 



NATURAL SCIENCES OF PHILADELPHIA. 



651 



A NEW ALBULOID FISH FROM SANTO DOMINGO. 



BY HEXRY W. FOWLER. 



DIXONINA gen. nov. 

 Type Dixonina nemoptera sp. nov. 



Body elongate, robust, fusiform. Head elongate, slender, com- 

 pressed, attenuate. Snout conic, pyramidal, well protruded beyond 

 mandible. Eye moderate. Adipose eyelid well developed. Mouth 

 large, horizontal. Maxillary strong, large, nearly to middle in head 

 length, slips below broad membranous preorbital. Premaxillaries 

 moderate, non-protractile. Lateral edge of upper jaw formed by 

 maxillary. Jaws, vomer and palatines with villiform teeth. Coarse 



blunt paved teeth in broad areas on basibranchial, sphenoid and 

 pterygoid bones. Tongue broad. Nostrils small, together. Inter- 

 orbital and head above mostly depressed. Opercle moderate, firm. 

 Preopercle with posterior membranous edge more produced behind 

 below. Rakers short asperous tubercles, few in number. Pseudo- 

 branchiae present. Gill-membranes entirely separate, free from 

 isthmus, fold across anteriorly with its hind edge plicate. No gular 

 plate. Body covered with rather small brilliantly silvered scales, 

 head naked, and fins minutely scaled. Belly convex, covered with 

 usual squamation. Lateral line complete. Dorsal moderate, inserted 

 well before ventral. Anal well behind dorsal, small. Pectoral small, 

 also ventral. Coloration uniform. 



