872 Report oF THE STATE GEOLOGIST. 
Shell-substance highly punctated in all its parts. 
Type, Zropidoleptus carinatus, Conrad (sp.). 
Distribution; Lower and middle Devonian. 
Nors.— In the treatment of the post-paleozoic genera of the 
terebratuloids it has seemed necessary and appropriate to defer 
to the opinions of other authors, and therefore desirable, at least 
for the purposes of the American student, to consider them sepa- 
rately from the palzozoic genera, following in a general way 
the accepted interpretation of their affinities, but not often 
expressing a judgment as to the generic value of their characters. 
[?] Cruratula, Bittner. 1890. 
Magetxiania-like shells, with median septum in the brachial 
valve, punctate shell, but with the lateral or descending branches 
of the loop not united, so far as known. 
Fias. 516, 517. Cruratula Eudora, Laube (sp.). (BiTTNER.) 
Type, Cruratula Eudora, Laube (sp.). 
Distribution. Trias. 
Terebratulina, d’Orbigny. 1847. 
Shells biconvex; ovate in outline. Cardinal extremities faintly 
auriculate. Beak of pedicle-valve trunctated by a circular 
foramen ; deltidial plates small. Surface finally radiate. Interior 
124 
