52 



NEW YORK STATE MUSEUM 



Atrypa reticularis Linn6 c 



Camarotoechia congregata Conrad 

 C. prolifica Hall 



Pentamerella pavilionensis Hall, .cc 

 Cryptonella planirostris. Hall 



C. rectirostris Hall 

 Tropidoleptus carina tiis Conrad, .cc 



Crinoids 

 Platycrinus sp. 

 Megistocrinus depressus Hall 

 M. Ontario Hall 

 Thylacocrinus clarkei W. & S. 

 Ancyrocrinus bulbosus Hall 

 Dolatocrinus liratus Hall 



D. intermedins Hall 

 D. glyptus Hall 



D. troosti Hall ' 



Aorocrinus cauliculus Hall 

 A. pocillum Hall 

 A. praecursor Hall 

 Eleuttierocrinus whitfieldi Hall 

 Gennaeocrinus eucharis Hall 

 G. nyssa Hall 



Gilbertsocrinus spinigerns Hall 

 Melocrinus gracilis TF. cC- ^. 

 Poteriocrinus diffusus Hall 

 P. nereus Hall 

 P. nycteus Hall 

 Poteriocrinus S'p. 

 Rhodocrinus gracilis Hall 

 R. spinosus Hall 

 R. nodulosus Hall 

 Nucleocrinus lucina Hall 

 Pentremites leda Hall 



Menteth limestone 



In this thin layer the species of the fauna are crowded together 

 in great numbers. Several years ago the late Prof. Charles E. 

 Beecher of Yale University collected at the localities of this inter- 

 esting formation, and the etchings from the material thus gathered 

 have been studied and identified by Percy E. Eaymond of the 

 Carnegie Museum, Pittsburg. Mr Kaymiond is about to publish 

 some account of the fauna and he has permitted me to give here 

 his list of species determined to which I have added a few not 

 recognized by him. 



Worms 



Spirorbis angulatus Hall 

 S. spinuliferus '^ich, 

 Cornulites tribulis Hall 

 Cornulites .sp. nov. 

 Autodetus lindstroemi Clarke 

 Autodetus sp. nov. 

 Proetus rowi Green 

 P. macrocephalus Hall 

 Cyphaspis ornata Hall 

 Homalonotus dekayi Oreen 

 Phacops rana Oreen 

 Cryphaeus boothi Green 



Crustaceans 

 Primitiopsis punctllifera HaU 

 Kirkbya parallela Ulrich 

 Strepula sigmoidalis Jones 



Isochilina lineata Jones 

 I. (?) fabacea Jones 

 Primitia seminulus Jones 

 Octonaria stigmata Ulrich 

 Ctenobolina papillosa Ulrich 

 Beyrichia kolmodini Jones 

 Halliella retifera Ulrich 

 Moorea bicornuta Ulrich 

 Ostracoda — severaf unidentified spe- 

 cies 



Cephalopods 



Orthoceras sp. ind. 



Pteropods 



Styliola sp. und. 

 Tentaculites bellulus HaU 

 Ilyolithes aclis Hall 



