134 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 4?,. 



outer ray with a short filament, about 0.45 length of head, tip not 

 reaching origin of anal; pectoral 2.28 in head. 



Color in alcohol: Light clove browii, fins somewhat darker. 



Type.— €eit. No. 72946, U.S.X.:M., 38.7 cm. in length, taken with a 

 beam trawl at station 5585 (lat. 4° 07' 00" N.; long. 118° 49' 54" E.), 

 Sipadan Island, Borneo, at a depth of 476 fathoms, on a bottom of 

 gray mud. 



In the collection there are 3 examples of this species from station 

 5657 (492 fathoms), 3 from station 5658 (510 fathoms), and 1 from 

 station 5460 (565 fathoms). 



This species might be considered an additional form under com- 

 mutabilis, but as the nature of the conditions under which it is found 

 appears to have had a marked influence on its structure, rendering it 

 more readily separable from the other forms (all of the typical 

 examples having been taken from deeper water than specimens of 

 commutabilis and showing in their structure characteristic differ- 

 ences), it has seemed best to describe it as a distinct s])ecie3. 



Fig. 9.— CCELORH'i'NrHUS PLATORHYNCnrS, FORM ALPHA. 



Four specimens, 1 from station 5586 (347 fathoms), 2 from station 

 5587 (415 fathoms), and 1 from station 5111 (236 fathoms), vary 

 from the typical examples as noted below: 



Form alpha. — DiflPers from typical examples in having the under- 

 side of the head naked, a naked area on either side of the median 

 line of snout anteriorly, and the snout less blunt. Figure 9 is of a 

 specimen 31.6 cm. in length, taken ■\\'ith a beam trawl at station 

 5587, near Sipadan Island, Borneo, at a depth of 415 fathoms. 



CCELORHYNCHUS ACUTIROSTRIS Smith and Radcliffe. new species. 

 Plate 30, fig. 2. 



Dorsal ii,8-75; anal 70; ventrals 7; pectorals 15 or 16. 



Head 3.30 in total length, strongly depressed anteriorly, ridges on 

 occiput very distinct, arranged as in related species ; suborbital ridge 

 strongly salient, ending in a sharp point in front of angle of preopercle ; 

 body compressed, greatest depth 6.82 in total length; vent immedi- 

 ately in front of origin of anal; tail compressed, tapering; eye irreg- 

 ularly subelliptical, horizontal diameter 4.60 in head, vertical diameter 



