156 CATALOG OF FOSSIL FISHES IN THE MUSEUM 



Squatina alifera (Miinster) 



E 2162 Cast of a fish. Lithographic slate (Upper Jurassic); 

 Eichstadt, Bavaria. 



Squatina speciosa von Meyr 



E 2161 Cast of the skeleton of a fish on a slab. Lithographic slate 

 (Upper Jurassic) ; Eichstadt, Bavaria. 



ICHTHYODORULITES 



Acondylacanthus aequicostatus St. John and Worthen. 



E 2500 Spine 150 mm. in length, lacking the inserted portion, and 

 II mm. in extreme width. One of the lateral faces is 

 imbedded in the Hmestone matrix, the other is exposed. 

 The posterior face shows the deeply excavated pulp 

 cavity, bordered by the double row of hooked denticles, 

 which are present for a distance of 113 mm. below the 

 apex. Each lateral face is ornamented by eleven smooth, 

 poHshed costae. 



Keokuk limestone; Warsaw, Illinois? Purchased, 

 1915- 



Anodontacanthus pusillus, n. sp. 

 (PI. 44, fig. 2) 



E 1915 Type. — A small spine lacking the distal extremity. Length 

 14 mm. (when complete about 20) ; greatest width 4 mm. 



Formation and Locality. — Conodont bed (Genesee) ; Eighteen Mile 

 Creek, near North Evans, Erie County, N. Y. Collected by W. L. 

 Bryant. 



Spine small, straight, gently tapering. Cross-section broadly ellip- 

 tical toward proximal end, subcircular toward distal end. . Pulp 

 cavity completely enclosed, its diameter at proximal extremity of 

 preserved portion one-fifth the diameter of the entire cross-section. 

 External surface incised with longitudinal lines of various lengths, 

 somewhat irregular in direction and occasionally anastomosing. 

 No denticles. 



