1903] NATURAL SCIENCES OF PHILADELPHIA. 755 



Scales large, edges mostly entire, cycloid, stiff, and rather narrowly 

 imbricated along middle of side. A few small scales on base of caudal, 

 fins otherwise naked. Lateral line not evident. 



Three mandibular photophores. One on lower anterior portion of 

 opercle. An interorbital photophore. One at lower base of pectoral, 

 and another just below along edge of gill-opening. Five thoracic. 

 One anterolateral, above base of ventral. One mediolateral low, 

 and just a little behind and above tip of ventral. Another apparently 

 mediolateral, two scales behind and a little higher. Posterolateral 

 inconspicuous, median in depth, and also about midway between 

 dorsals over breach in anals. Vcntrals four. Five anals, then a breach 

 and finally four more. Six more continued along lower side of caudal 

 peduncle without a breach, then two more. Two caudals below. 

 One caudal above. Six large supercaudals, beginning just behind 

 adipose fin. 



Dorsal rather small, inserted nearer tip of snout than base of caudal, 

 and posterior base opposite front of anal. Anal long, inserted nearly 

 midway between posterior margin of pupil and base of caudal, anterior 

 rays highest. Adipose dorsal small, a little before end of base of anal. 

 Caudal small. Pectoral small, inserted a little below middle of depth 

 of body. A'entral small, inserted near last third in space between 

 origin of pectoral and that of dorsal. 



Color in alcohol deep dusky with iridescent bluish, purplish and sil- 

 very reflections. Fins plain pale brownish. Photophores black, with 

 bright silvery centers. Supercaudals with dull yellowish. Iris dull 

 dark yellowish. 



Length IfV inches. 



T^^pe No. 7,972, A. N. S. P. Near the Sandwich Islands. Dr. 

 William H. Jones. Also three co-types with same data, and the small- 

 est of these, together with the type, may probably be males as they are 

 a little more attenuate than the others. 



Originally I wrongly identified these examples with Mydophum 

 coruscans Richardson. Drs. Jordan and Evcrmann consider them 

 identical with their Rhinoscopelus oceanicus. If occanicus is correct 

 generically it is certainly distinct from the examples before me of 

 choprocephalus. Examination of R. coccoi, typical of that genus, show 

 that it has long, slender and numerous gill-rakers on the first arch. 

 R. oceanicus would further differ in the large eye {2h in head) and deeper 

 body (4yV in length). 



(X(npo<^^ pig; KtcpaXrij head.) 



