[SCIENTIFIC RESULTS OF THE PHILIPPINE CRUISE OF THE FISHERIES STEAMER 

 "ALBATROSS," 1907-1910.— No. 13.] 



DESCRIPTIONS OF FIFTEEN NEW FISHES OF THE FAAHLY 

 CHEILODIPTERID.E, FROM THE PHILIPPINE ISLANDS 

 AND CONTIGUOUS WATERS. 



By Lewis Radcliffe/ 



Scientific Assistant, United States Bureau of Fisheries. 



The new species of Cheilodipteridse herein described^ were collected 

 on the Pliilippine expedition of the LTnited States Bureau of Fish- 

 eries steamer Albatross. It is noteworthy that three of them were 

 secured at a single haul of the beam trawl at station 5442, on the 

 west coast of Luzon. One species, Amia hyalina, was taken at 

 Talisse Island, north of Celebes, outside the Philippine Archipelago. 



Genus AMIA Gronow. 



A new subgenus, Amioides, is herein described. Because of the 

 unnatural groupings resulting from subdivisions of the genus based 

 on single characters, such as presence or absence of serrations on 

 the preopercle, character of teeth, character of lateral line, etc., it 

 has seemed preferable to await a more thorough study of the whole 

 group before deciding whether Amioides is entitled to generic rank. 



AMIA DIENC^A Smith and RadcliSe, new species. 

 Plate 34, fig. 1. 



Dorsal vi-i,9 ; anal ii,8 ; scales 4 + 8-24. 



General form elliptical-ovate; head 2.46, pointed; dorsal contour 

 from tip of snout to insertion of spinous dorsal straight, steep; body 



• In the study o> this collection the writer has been associated with Dr. Hugh M. Smith, who becomes 

 joint author of the new genera and species herein described. 



' The measurements herein used represent the ratio between length of part described and the standard 

 length from tip of snout to end of last caudal vertebra, with the exception of eye, snout, maxillary, inter- 

 orbital, fins, and least depth of caudal peduncle, which are expressed in ratio to head measured from tip 

 of snout to posterior edge of opercle (not including opercular flap). The length of caudal peduncle is meas- 

 ured between the verticals drawn at base of last anal ray and at end of last vertebra. Even when the 

 jast dorsal and anal rays are cleft to base they are still counted as single rays. The scale formula indi- 

 cates the number of scales in a transverse row from insertion of dorsal downward and backward to and 

 including lateral line and the number of transverse rows above the lateral line, between upper angle of 

 opercle and end of last caudal vertebra. 



Proceedings U. S. National Museum, Vol. 41, No. 1868. 



431 



