1903.] NATURAL SCIENCES OF PHILADELPHIA. 733 



beak with upper jaw, and each ramus elevated inside of mouth. Lips 

 thin, fleshy at corner of mouth. Teeth small in jaws, those in front of 

 upper curved downward. Vomer and palatines edentulous. Tongue 

 far back, flattened, elongate, rounded, and free in front. Nostrils 

 lateral, above and in front of eyes. Interorbital space broad, slightly 

 convex. Postocular ridge not distinct. 



Gill-opening rather large, carried forward till below middle of eye. 

 Rakers fine, numerous, and slender on first arch. Filaments moder- 

 ately long, or about equal to rakers, and numerous. No pseudo- 

 branchiae. Isthmus a long, narrow^ sharp-edged keel anteriorly. 

 Branchiostegal membranes united for short distance at first, also 

 adnate by means of frenum to anterior portion of isthmus. 



Scales small, cycloid, not imbricated, and smooth. Head scaled, 

 with exception of jaws, snout, and under surface. Bones of snout and 

 front of head above more or less cavernous. Several pores present. 

 Axil of pectoral without flap. Ventrals close together, without median 

 scaly flap. 



Origin of spinous dorsal a little nearer tip of snout than base of 

 caudal. Dorsal spines pungent, slender, rather weak, and first and 

 second longest. Origin of soft dorsal nearly midway between that of 

 spinous dorsal and tip of last depressed anal ray. Anterior rays high- 

 est. Anal long, beginning just above base of last dorsal spine, or a 

 little nearer base of caudal than tip of snout. Length of its base a 

 little less than ^ of body without caudal. Anterior rays highest. 

 Caudal broad, emarginate. Pectoral large, elongate, reaching well 

 beyond root of ventral, but not to origin of dorsal. Ventral shorter, 

 reaching to anus or not quite to origin of anal. Anus directly in front 

 of anal fin or at tip of depressed ventral. 



Color in alcohol pale, more or less uniform brown. Side of body with 

 a well-defined narrow silvery-white longitudinal band about width of 

 pupil, and extending to base of caudal. Fins uniform pale brown. 

 Peritoneum bright silvery. 



Length (caudal damaged) 3| inches. 



Type No. 10,177, A. N. S. P. India. R. Coates. 



One example, the type. 



(Named for Dr. Francis Day, among late Iclithyologists a most able 

 author of many papers on Indian fishes.) 



