CANANDAIGUA AND NAPLES QUADRANGLES 



51 



celestite and hence at times make very striking specimens. They 

 are : 



Phacops rana Green Lyriopecten orbiculatus Hall 



Orthoceras caelamen Hall Spirifer inucronatus Conrad 



O. exile Hall 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 : 



Crustaceans 



Phacops rana Green ccc 



Dalmanites boothi Green c 



Proetus niacrocephalus Hall 

 Homalonotus dekayi Hall 



Worms 

 Spirorbis angulatus Hall 



Cephalopoda 

 Orthoceras nuntium Hall 

 Gyroceras liratum Hall 

 Tornoceras uniangulare Conrad 

 Bactrites tenuicinctus Hall 



Pteropods 

 Tentaculites bellulus Hall 

 Hyolithus aclis Hall 



Gastropods 

 Bellerophon leda Hall 

 B. patulus Conrad 

 B. thalia Hall 

 Platyceras carinatmn Hall 

 P. conicum Hall 

 P. thetis Hall 

 Tleurotomaria itys Hall 

 Loxonema delphicola Hall 

 Diaphorostonia lineatum Conrad. ccc 

 Cyclonema trilix Hall 



Lamellibranchs 

 Mytilarca oviformis Conrad 

 Macrodon haruiltoniae Hall 

 Microdon bellistriatus Conrad 

 Cypricardinia indenta Conrad 



i 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. tenuistriata Hall 



Actinopteria decussata Hall c 



Brachiopods 

 Craniella hamiltoniae Hall 

 Crania crenistria Hall 

 Pholidops hamiltoniae Hall 

 Rhipidomella penelope Hall 



R. vanuxemi Hall c 



Stropheodonta concava Hall c 



S. inequistriata Hall c 



S. junia Hall c 



Leptostrophia perplana Conrad. . .cc 



Chonetes coronatns Conrad 



C. deflectus Hall 



Productella papulata Hall 



P. spinulicosta Hall 



Spirifer marcyi Hall 



S. mucronatus Conrad c 



S. consobrinus d'Orbigny 

 Ambocoelia umbonata Conrad 

 Nucleospira concinna Hall 

 Trematospira gibbosa Hall 

 Meristella haskinsi Hall 

 Athyris spiriferoides Eaton c 



