614 



HISTORICAL GEOLOGY. 



species of Goniatites and O^'thoceras, and a few other species. The Naples 

 beds, in the Lower Portage, have afforded the first of American species of 



949-953. 



949. 



953 



950. 



Fig. 949, Clymenia Neapolitana, of New York (x 4) ; 950, profile of same ; 951, transverse section near beginning 

 of 5th whorl ; 952, same at end of 1st, 2d, 3d, and 4th whorls ; 953, form of the suture at 2^ revolutions. 

 J. M. Clarke. 



054. 



Clymenia (Fig. 949), a genus related to Kautilus, but having the siphuncle 

 dorsal (Fig. 951). Fig. 954 represents Goniatites intumescens (G. Patersoni 

 Hall) of the same beds ; it occurs also in the Ithaca group. 



The so-called CatsMll beds contain no 

 remains of marine Molltisks of any kind, 

 except occasionally such as are regarded as 

 Chemung, and as indications that the beds 

 are Chemung. 



5. Crustaceans. — Trilobites have not a re- 

 corded species from the Xew York Portage ; 

 and in the Chemung occur only Phacojjs 

 nupera H., doubtfully, and Cyphas])his Icevis 

 H., Phacops rana and Dalmanites {Cry- 

 phcBus) Boothi. But conditions were more 

 favorable in Ohio, and a Chemung fauna, 

 according to Herrick, has afforded the follow- 

 ing species : Proetus minutus Hk., P. prcjecursor, P. cloris Winchell, P. auric- 

 ulatus H., Phoithonides occidentalis Hk., P. spinosus Hk., and others. 



Phyllopod Crustaceans were of various forms and species in the Portage, 



Goniatites Patersoni Hall. 



