NATURAL SCIENCES OF PHILADELPHIA. 221 



measured along the median line above equal eleven lines ; one of these is 3-6 

 lines in width above ; width of a (?) posterior caudal 3 1. ^ 



This animal has been, like Amphiuma, a snake-like Batrachian, out probably 

 of even more elongate form. How near its affinities to this genus may be, 

 cannot be ascertained, owing to want of important parts of the skeleton, but 

 it differs in the important feature of the large, well developed ribs. 



LABYRINTHODONTIA. 



DITCYOCEPHALUS Leidy. 



DiCTYocEPHALUS ELEGANS Leidv, Proc. Acad. Nat. Sci., 1856, 256. Emmons 

 'Geology North Amer., p. 59." Tab. 31. 

 Triassic Coal Measures, Chatham Co., N. Carolina. 



CENTEMODON Lea. 



Centemodon stTLCATtrs Lea, Proc. Acad. Nat. Sci., Phila., 1856, 18. 

 Triassic Shales near Phoenixville, Chester Co., Penn. 



BAPHETES Owen. 



Baphetes planiceps Owen, Quart. Journ. Geol. Soc. Lond. x, 1853, (xi, notes). 

 Carboniferous Coal Measures of the Joggins, Nova Scotia. 



EUPELOR Cope. 



Gen. nov. Char. Teeth subcylindric, with large pulp cavity at the basis only ; 

 external surface without grooves ; dentine divided by numerous flat vertical 

 lamina; of a dense substance, probably enamel, which radiate from very near the 

 pulp cavity to the external enamel layer. 



The species on which this genus depends was originally described by the 

 writer as a Mastodonsaurus. The latter genus, however, exhibits external 

 grooves where the inflections of enamel enter and separate the dentine. These 

 inflections, as is well known •from the figures and descriptions of Professor 

 Owen, are more or less convoluted, some of them very highly so. The laminae 

 of the teeth of the Eupelor cannot be looked upon as inflections of enamel, 

 but rather as branches. They are exceedingly thin, and our sections do not 

 demonstrate them to be double. If they are double they are very much more 

 atten\iated than the external enamel stratum. They may be distinguished in a 

 section of the wall of the pulp cavity at the base of the root as well as else- 

 where. 



Eppelor dcrus Cope, Mastodonsaurus durtts Cope. Proceed. Acad. Nat. Sci., 

 Phila., 1866, 249. 

 From the Triassic Red Sand Stone near Phoenixville, Chester Co., Penn. 



On AGAFHELTJS, a genus of toothless Cetacea. 



BY EDW. D. COPE. 



During the autumn of 1866 a whale was cast ashore on the Long 

 Beach, Ocean Co., N. J., opposite Westecunk, on the other side of Little Egg 

 Harbor, near the residence of Wra. A. Crane. A recent visit to the spot fur- 

 nished me with the means of determining the species to which this monster of 

 the deep belonged, although not with the completeness desirable, as the tide' 

 had a short time previously taken off" the most bulky part of the carcass. Thus 

 the cranium, cervical and dorsal vertebrae, with the first ribs, the most import- 

 ant portions for its identification, were lost. There were pt'eserved, however, 

 the mandibular arch, ear-bone, one scapula and both fins, numerous ribs, many 



1868.] 



