PSEUDOTRIAKIS ACRAGES. 105 



Body much longer than the tail. Head about one fifth of the total length, 

 depressed, Httle convex across the crown, tapering from the angles of the mouth 

 forward. Snout short, narrowed, blunt. Nostrils much nearer to the mouth 

 than to the end of the snout; free edges of both anterior and posterior valves 

 short, equal, on the inner halves of the nostrils, without cirri. Mouth very 

 large, outline subtriangular and narrowly rounded at the symphysis of the jaws, 

 with a short labial fold around the angles, lower fold twice as long as the upper. 

 Teeth small, in 208 rows on the upper jaws, three cusped near the middle of the 

 mouth, with strong median cusps and striate bases, with three to five cusps 

 toward the angles, where they are asymmetrical and the cusps are more equal. 

 Eye small, orbit half as long as the snout, above the mid length of the mouth; 

 lids without a fold, meeting against one another if closed. Spiracle small, half 

 as long as the eye, little less than the distance behind the orbit. Width of gill 

 openings little more than the orbital length, hindmost one above the pectoral. 

 Pectorals short, length equal that of the head from snout to spiracle, width equal 

 three fourths of the length. First dorsal as long as the head to the last gill 

 opening, upper margin in a low curve from end to end, origin about midway from 

 the hindmost gill opening to the ventrals, end of base nearly opposite the ventral 

 origins, hind angle slightly produced. Second dorsal more than twice as long as 

 high, origin about opposite the ends of the ventrals, hind angle slightly produced, 

 end of base little behind the base of the anal, tip reaching the origin of the caudal. 

 Anal much smaller than the second dorsal, origin behind the anterior fourth of 

 the same fin, hind angle hardly produced. Bases of the ventrals shorter than 

 the second dorsal base, longer than the base of the anal, outer angles broadly 

 rounded. Vertebral axis of the caudal rising little. Subcaudal little shorter 

 than the head, not deep, lobe not produced, separated from the terminal by a 

 notch. Scales minute, resembling those of Parmaturus pilosus (Plate 8, fig. 4, 5), 

 without the lateral notches on the crown, with a sharp median keel. 



Total length 85 inches, snout to abdominal pores 51, snout to second dorsal 

 54, snout to first dorsal 32, snout to pectorals 16, snout to mouth 4, width of 

 mouth 82, length of pectorals 85, width of pectorals 6, and length of caudal fins 

 18, base of first dorsal 13, base of second dorsal 10, and base of anal 7 inches. 



Uniform brown. 



Hardly distinct from P. microdon. 



The specific name originally given was acrales, said to mean dumb or 

 speechless, from the Greek. The Greek word for voiceless, not yelling, is 

 'AKpdyyjs, Acrages. 



Pacific; near Japan. 



