292 



Report of the State Geologist. 



98 C. setigera. r 



99 C. scitula. r 

 100 C.lepida. re 



103 Productella spinulicosta. r 



104 Strophalosia truncata. r 



105 Spirifer mucronatus. re 

 116 Amboccfilia unbonata. rc 

 132 Liorliyncliiis limitaris. rc 

 138 Tropidoleptus carinatus. r 



Crinoid stems, r 



Of these Muomphalus (Phanerotinas) laxus has not previously been 

 recorded from the Marcellus shales, but this species is found in the Pteropod 

 layers which are undoubtedly of this age. Primitiopsis punctulifera has not 

 been noticed from the Marcellus, but a Leperditia is recorded.* 



In the lower portions of these shales the characteristic Marcellus species 

 predominate : Styliolina jissurella, Lunulicardium fragile, Liorhynchus 

 limitaris, etc. In the upper portion, species forming normal constituents of 

 the lower Hamilton faunas are more abundant, viz. : Spirifer mucronatus, 

 Chouetes lepida, etc , though the characteristic Marcellus species are by no 

 means absent, 



b. The fauna of the Strophalosia bed. 



Fossils are numerous in this bed, the most abundant and persistent form 

 being Stroplialosia truncata, Hall The gasteropods are quite common, 

 especially Loxonema and Bellerophon Leda. 



Ortlioceras exile (?) is another common though poorly preserved form. 



The following is the list of species obtained from this bed. 



Crustacea : 



1 Phacops rana. r 



2 Cryphseus Boothi. R 



Cephalopoda : 



9 Orthoceras subulatum. rc 

 12 O. exile (?). c 



Pteropoda : None. 



* See list of Marcellus fossils by J. M. Clarke in report of N. Y. State Geologist for 1888. 



