Descrijytion of a iVev/' Genus and Eleven Xew Species. 103 



nati, b\' Robert Clarke, Esq., in 184:6, and was b3'him recently donated 

 (with a large collection of shells, minerals and fossils) to the Cincin- 

 nati University'. It is the smallest species known from our rocks, and 

 quite distinct in every feature shown. The specific name is in honor 

 of the collector. 



Glyptocrinus dyeri, var. subl^vis. (Plate III., fig. 2.) 



[Ety. — subhei-is, somewhat smooth.] 



The beautiful specimen illustrated, and from which this description 

 is drawn, agrees in every substantial particular, except as to surface 

 markings, with G. dyeri; Prof. Meek found only from nine to eleven 

 pieces, in each secondary- radial series, in the G. dyeri., but other speci- 

 mens have shown fourteen or fifteen pieces. The variety under con- 

 sideration shows as many pieces as the latter specimens. It bears no 

 evidence on the surface of ever having been sculptured. The plates 

 are smooth, with a slightlj' elevated line at the junction of the pieces. 



It is distinguished from G. dyeri, only bj^ the absence of the radi- 

 ating costte which ornament the plates. If these have been defaced, then 

 the varietj- must fail. The appearance of the specimen, however, is 

 against such a supposition. 



The specimen was broken, at the top of the vault, into two pieces. 

 The fracture was afterward filled with carbonate of lime, and the two 

 pieces as thoroughly cemented together as if the specimen had never 

 been broken. A ridge around the specimen marks the place of the 

 fracture, and has every appearance of the elevations on some specimens 

 of septaria. 



The specimen belongs to the collection of Mrs. M. P. Haines, and 

 was collected near the top of the Hills, in Eden Park, in the Cit}^ of 

 Cincinnati. 



Cyrtolites MAGNUS, u. sp. (Plate III., fig. 10.) 



[Ety.— 3fag7ius, large.] 



Shell consisting of three or more volutions, very gradually increas- 

 ing in size and rolled in the same plane. Each outer volution em- 

 braces one third or more of the inner one. Dorsal side sharp and 

 well defined. Greatest convexity of each whorl near the inner side, 

 which is sub-angular. Transverse section of a whorl sub-triangular. 

 Umbilicus alike on either side, rather wide and deep, and showing 

 about one third of each inner turn. 



The surface of the shell, in the specimen examined, has been too 

 much eroded to determine the external markings. 



The greatest diameter of the shell is 1 1-lOth inches; convexity 



