1906.] 



NATURAL SCIENCES OF PHILADELPHIA. 



449 



origin of anal and lateral line; 14 to 17 scales before dorsal, usually 15 or 

 16 ; snout 4 to 4f in head, measured from tip of upper jaw; eye 2f to 3|; 

 maxillary 2f to 3^; length of depressed pectoral (mostly damaged) 

 about 2^ to 3 ; length of examples 3^ to 6|- inches. 



Cope's figure, which however may not have been drawn from the 

 specimen which is here restricted as the type, differs in having the 

 abdominal profile more undulate, the absence of mandibular cirri, 

 the radii of anal anteriorly much lower, and the adipose fin too small. 

 The mandibular cirri are present in most every case examined, though 

 in the adult they are much shorter and inconspicuous. 



Granting Dr. Giinther's argument concerning Agassiz's figure of 

 Chalceus angulatus, it is reasonably certain that my specimens belong 

 to that species. 



Ch.alciiiU9 bracliipomus Valenciennes. Fig. 43. 



Width of head 2 in its length ; interorbital space 2| in head measured 

 from tip of upper jaw. Body strongly compressed. Back rounded 

 along edge. Preventral and postventral regions trenchant. Snout 

 broad, surface convex, and rounded when viewed above. Teeth in 



-^v3£: 



■^««^ 



Fig. 43. — Chalcinus brachipojnus Valenciennes. 



upper jaw biserial, 3 median ones of inner series compressed and some- 

 Avhat enlarged. Mandible with 5 teeth on side of each ramus anter- 

 iorly enlarged, and at symphysis 2 conical teeth. At least 2 small 

 teeth on inner base of maxillary more or less concealed by lips. Tongue 



