C. R. Eastman — New Elasmobranchs from Solenhofen. 403 



of the usual hour-glass form, and do not call for any special 

 comment. 



Both the median and paired fins are very well preserved. 

 The pectorals are large, lappet-like, not abruptly truncated dis- 

 tally as in modern representatives of Scyllium, but obtusely 

 pointed, as is the case in Cretaceous species of Palseoscyllium. 

 The low pelvic fins arise at a point opposite the middle of the 

 first dorsal. The endoskeletal supports consist of at least a 

 dozen segmented radialia. The first dorsal arises at about the 

 middle of the back, is of triangular form and moderate height, 

 with twelve or more strong radialia. The second dorsal is sim- 

 ilar to the first, but smaller, and the gently rounded anal lies 

 directly beneath its posterior half. The tail is strongly hetero- 

 cercal, in this respect differing from Palseoscyllium and resem- 

 bling the recent G-inglymostoma. 



A minor feature which deserves perhaps casual mention is 

 the preservation within the intestinal tract, near the vent, of 

 portions of undigested food, including small ganoid scales, frag- 

 ments of a small finely striated dorsal fin-spine (doubtless the 

 young of some Cestraciont shark), and a number of small 

 Echinoid spines, besides a few Foraminifera tests. 



An outline drawing of this highly interesting shark is given 

 in the annexed illustration (Plate II). 



Genus Squatina (Aldrovandi) Dumeril. 

 Squatina minor, sp. dov. (Plate III.) 



Type. Complete skeleton, Carnegie Museum (Cat. No. 4737). 



In general like the contemporary species of S. ahfera, but 

 distinguished from it by its smaller size (total length 49 cm ), rela- 

 tively narrower disk, and more posterior position of both dor- 

 sal fins. The first dorsal arises at a point about one-third the 

 distance between the hinder extremity of the pelvic fins and 

 tip of the tail, the second dorsal midway between the latter 

 point and origin of the first dorsal. Dentition and other char- 

 acters as in the typical species. 



The differential characters given in the foregoing diagnosis 

 are considered of sufficient weight to warrant a specific separa- 

 tion between the form here described and its larger contem- 

 porary which accompanies it in the same locality, 8. alifera. 



Not more than two or three examples of the latter form have 

 thus far been brought to light, so far as published information 

 shows, and the holotype of the new species here made known is 

 unique. Hence the genus Squatina must be regarded as repre- 

 sented very sparsely, and by not more than three species, 

 at the time of its advent in the Upper Jura of Solenhofen. 



