44 NEW YORK STATE MUSEUM 



work as a whole is well advanced and as it covers a field of essen- 

 tially new knowledge in this State, may constitute a substantial con- 

 tribution to paleontologic science. During the past two seasons 

 quite extensive discoveries of orinoids have been made by Mr Lu- 

 ther in the Chemung shale of the town of Italy, Yates co., all of 

 which prove to be new and noteworthy additions to the crinoid 

 fauna of the rocks. The progress made in these studies is indicated 

 by the statement of the families represented and the species 

 recognized. 



INADUNATA 



Family CYATHOCRINIDAE 

 Arachnocrinus bulbosus Hall. Onondaga limestone 

 A. sp. nov. Onondaga limestone 

 A. sp. nov. Onondaga limestone 



Family DENDROCRINIDAB 

 Cosmocrinus ornatissimus {Hall). Portage fauna 

 Maragnicrinus portlandicus {Whit-field). Portage fauna 



Family pisocrinidae (?) 

 Hypsocrinus fieldi Springer & Slocum. Hamilton shale 



Family CALCEOCRINIDAE 

 Halysiocrinus secundus {Hall). Onondaga limestone 



ADUNATA 



Family platycrinidae 

 Cordylocrinus plumosus {Hall). Coeymans limestone 

 C. plumosus var. parvus {Hall). Coeymans limestone 

 C. plumosus var. ramulosus {Hall). Coeymans limestone 

 Platycrinus eriensis Hall. Hamilton shale 



Family M4RSIPOCRINIDAE 



Marsipocrinus tentaculatus {Hall). Coeymans limestone 



Family hexacrinidae 

 Hystricrinus eboraceus {Hall). Hamilton shales 

 H. sp. nov. Chemung fauna 

 H. sp. nov. Portage fauna 



CAMERATA 



Family RHODOCRINIDAE 

 Acanthocrinus spinosus {Hall). Hamilton shale 

 Rhodocrinus nodulosus {Hall). Hamilton shale 

 Thylacocrinus gracilis. {Hall). Hamilton shale 



