Paleontology of the Cincinnati Group. 



oped or absent; basals 5, truncated above. for the reception 

 of the lower series of interradials ; primary radials 3 x 5, of 

 nearly equal size, the first and third nearly similar in form, 

 the ridges of the former branching downward toward the 

 basals, those of the latter upward toward the secondary 

 radials, which they follow until these turn into free arm 

 plates; arms branching or simple, composed of single joints, 

 which give off rather strong pinnules ; interradial spaces com- 

 posed of numerous small pieces, without definite arrange- 

 ment ; the plates rest upon the basals, separating the 5 rays 

 from the base up ; with the increase of interradials and inter- 

 axillaries by age, more radials seem to be gradually incorpo- 

 rated into the calyx, involving the proximal pinnules, the 

 plates of which are easily recognized from surrounding inter- 

 radial and interaxillary pieces by being more prominent. 

 Azygons interradius wider than the four others, with an ele- 

 vated ridge composed of rather large anal pieces, which are 

 longitudinally arranged and have somewhat the appearance 

 of radials ; the interaxillary areas depressed even deeper than 

 the interradial ones, consisting of similar plates. ( Review 

 of Palseocrinoidea, Part III, 1885, p. 94.) 



Remarks. — The two species placed here have been consid- 

 ered as belonging to both Reteocrinus and Glyptocrimis. 

 Wachsmuth and Springer believe they present features that 

 justify the erection of this new genus. It is most nearly 

 allied to Reteocrinus. 



1 — C. pattersoni S. A. Miller, 1882. 



Calyx small, height and width sub-equal ; interradial areas 

 depressed ; surface finely sculptured ; basals small, projecting 

 up between the under sloping sides of the first primary radi- 

 als ; first radials largest in the body, hexagonal, about as long 

 as wide ; the strong radial ridge in its extension below di- 

 vides at the center of this plate ; second and third radials much 

 smaller than the first, about as high as wide, hexagonal or 

 heptagonal, and of about equal size ; seco?idary radials arise 

 from upper sloping sides of the second primary radials (?) 

 and become free arms at the third plate; arms 10, consisting, 

 after becoming free, of strong cuneiform plates, each bearing 



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