CANANDAIGLUA AND NAPLES QUADRANGLES 



51 



celestite and hence at times make very striking specimens, 

 are: 



They 



Phacops rana Green 

 Orthoceras caelamen Hall 

 O. exile Hall 



Lyriopecten orbiculatus Hall 

 Spirifer inucronatus Conrad 

 Spirophyton typus Hall 



The last named object covers surfaces of the rock when inclined 

 to be shaly. 



Moscow shales 



Lower division 



The Moscow shales are well divided into subequal parts by 

 the Menteth limestone and as there is a lithologic difference in 

 the two on account of the gradual loss of calcareous content, we 

 may contrast the faunas of these divisions. Lower beds : 



.ccc 

 . .c 



Crustaceans 



Phacops rana Green 



Dalmanites boothi Green. . . . 

 Proetus macrocephalus Hall 

 Homalonotus dekayi Hall 



Worms 

 Spirorbis angulatus Hall 



Cephalopods 

 Orthoceras nuntium Hall 

 Gyroceras liratum Hall 

 Tornoceras uniangulare Conrad 

 Bactrites tenuicinctiis Hall 



Pteropods 

 Tentaculites bellulus Hall 

 Hyolithus aclis Hall 



Gastropods 

 Belleropho;i leda Hall 

 B. patulus Conrad 

 B. thalia Hall 

 Platyceras carinatum Hall 

 P. conicum Hall 

 P. thetis Hall 

 Pleurotomaria itys Hall 

 Loxonema delphicola Hall 

 Diaphorostoma lineatum Conrad. ccc 

 Cyclonema ti'ilix Hall 



Laviellihranchs 

 Mytilarca oviformis Conrad 

 Macrodou hamiltoniae Hall 

 MicTodon bellisti-iatus Conrad 

 Cypricardiiiia indonta Conrad 



C. pygmaea Hall 



Grammysia arcuata Conrad 



G. bisulcata Conrad 



Goniophora acuta Hall 



Modiomorpha concentrica Conrad 



Aviculopecten parilis Conrad 



Palaeoneilo fecunda Hall 



P. muta Hall 



P. plana Hall 



P. tenulstriata Hall 



Actinopteria decussata Hall c 



Brachiopods 

 Craniella hamiltoniae Hall 

 Crania crenistria Hall 

 Pholidops hamiltoniae Hall 

 Rhipidomella penelope Hall 



11. vanuxemi Hall c 



Stropheodonta concava Hall c 



S. inequistriata Hall c 



S. junia Hall c 



Leptostrophia perplana -Conrad . . . cc 



Chonetes coronatus Conrad 



C. deflectus Hall 



Productella papulata Hall 



P. spinulicosta Hall 



Spirifer marcyi Hall 



S. mucronatus Conrad c 



S. consobrinus d'Orhigny 

 Amboeoelia umhonata Cotir ad 

 Nncleospira concinna Hall 

 Trematospira gibbosa Hall 

 Meristella haskinsi Hall 

 Athyris spiriferoides Eaton c 



