440 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 41. 



The teeth are much stronger than in any other species of Amia, 

 their arrangement being very similar to that found in Synagrops and 

 unhke that found in Cheilodvpterus. Siphamia Weber has enlarged 

 curved teeth, which are differently arranged, however, and in the type 

 species (tubifer) there is more than one row on vomer and palatines. 



AMIA (AMIOIDES) GROSSIDENS Smith and Radcllfle, new species. 

 Plate 36, fig. 1. 



Dorsal vii-i, 10; analii,8; scales about 3 + 6-24. 



General shape oblong, compressed; head 2.63, conic, compressed; 

 contour lines of body unsymmetrical, depth 3.10; caudal peduncle 

 short, strongly compressed, depth 2.50, length 1.80; eye 3.43, small; 

 snout 3.60, pointed, tip of snout to origin of dorsal nearly straight; 

 mouth oblique, lower jaw projecting slightly; maxillary 1.90, short, 

 reaching slightly beyond vertical from middle of eye; interorbital 

 4.17, broad, flat, smooth; preopercle armed with strong serrations; 

 subopercle well developed, projecting beyond tip of opercle; a strong, 

 two-pronged scapular spine present ; a pair of long slender, recurved 

 canines at symphysis of lower j aw (one of these much smaller in this 

 specimen) , closing between two longer canines on upper j aw into pits 

 at symphysis; a narrow band of unequal cardiform teeth anteriorly, 

 merging -into a row of long, slender, recurved or incurved canines ; 

 teeth in upper jaw in a cardiform band widening posteriorly and 

 becoming smaller, more uniform, an outer row of small caninelike 

 teeth, strongest anteriorly; a row of small caninelike teeth along 

 ridge of vomer and a similar row of smaller teeth on palatine bones; 

 peritoneum silvery white, scales ctenoid, very deciduous. 



Dorsal spines strong, the first short, the third longest, 2.05; spine 

 of second dorsal 2.60, margin of fin nearly straight, anterior rays 

 longest, 1.87; caudal forked; anal similar to second dorsal, second 

 spine 2.72,longest ray 1.88; ventrals 1.93, not reaching vent; pectorals 

 1.58. 



Color in alcohol: Ground color buff, dusky on back, silvery white 

 reflections on sides and ventral surface; an indistinct blackish band 

 encirchng base of caudal; dorsals and caudal dusky, other fins hyalin. 



Type.— Ca.t. No. 70250, U.S.N.M., 10.1 cm. in length, taken with a 

 beam trawl at station 5442 (lat. 16° 30' 36" N.; long. 120° 11' 06" 

 E.), west coast of Luzon, at a depth of 45 fathoms on a bottom of 

 coral sand. 



In SipTiamia tubifer Weber the teeth are not so strong and differ- 

 ently arranged, and the gill-rakers are fewer and shorter. Apparently 

 the group to wliich it belongs is quite closely related to tliis one. In 

 our species the form and arrangement of the teeth are quite similar 

 to that found in some species of Synagrops. 



