1906.] NATURAL SCIENCES OF PHILADELPHIA. 443 



of 4 anteriorly resembling inner series except smaller. Inner series 

 of upper teeth 11, broad, compressed, quindentate and surface crenu- 

 late. Mandible with about 11 robust quindentate teeth in an outer 

 series, and a recurved canine forming an inner series, one on each side 

 of symphysis. Outer series of mandibular teeth continued along each 

 ramus of mandible posteriorly, where it is also not elevated inside 

 mouth, as very weak denticles. Along edge of maxillary some weak 

 denticles, most developed and crowded towards its base. Buccal 

 membranes in mouth rather broad. Tongue small, little free. Nos- 

 trils together, close in front and falling nearly opposite middle in depth 



Fig. 39. — Pellegrinina heterolepis Fowler. 



of eye. Interorbital space broad and but slightly convex, not ele- 

 vated. Infraorbital broadest in chain, and its greatest exposed width 

 not quite equal to that of opercle. Bones in orbital chain, and opercle, 

 with slight striae marginally. 



Gill-opening extending forward about opposite front rim of pupil. 

 Gill-rakers about 7 + 9 weak points less than half of pupil in length. 

 Filaments about equal to pupil. Isthmus narrow, with a convex 

 surface. 



Scales cycloid of various size, those on upper half large, and lower 

 reduced and of crowded appearance. Each scale with radiating 

 striae. Scales along base of anal and caudal small. Lateral line of 

 simple tubes, decurved and extending rather low till on base of caudal. 



