HISTORICAL SKETCH. XXil 
stones, although of small thickness, are well defined and each shows its characteristic fossils 
similar to those of the same strata in New York. There are twenty-five fossils described 
and figured (nine for the first time); of these the following are from the last mentioned 
limestones and the Hudson River group:— 
Phenopora multipora, n. sp. 
Clathropora flabellata, n. sp. 
Chetetes lycoperdon. 
Schizocrinus nodosus ? 
Echinospherites ? n. sp. 
Murchisonia major, n. sp. 
Asaphas barrandi, n. sp. 
Fossils listed from the Birdseye, Black River and Trenton limestones are given below :— 
Palzophycus —? 
Cheetetes lycoperdon. 
Streptelasma corniculum. 
— profunda. 
Stictopora ramosa. 
S. elegantula. 
S. — n. sp. 
Schizocrinus nodosus. 
Homocrinus — ? 
Lingula wqualis. 
Orthis testudinaria. 
O. subequata. 
O. pectinella. 
O. disparilis. 
Leptena alternata. 
Ambonychia obtusa. 
Nucula levata. 
Subulites elongata. 
Murchisonia major. 
M. bellicincta. 
M. — n. sp. 
M. angulata. 
Pleurotomaria ijenticularis. 
Orthoceras multicameratum. 
O. fusiforme. 
Harpes escanabie, n. sp. 
Phacops callicephalus. 
Catenipora gracilis, n. sp. 
Sarcinula ? obsoleta, n. sp. 
Modiolopsis pholadiformis, n sp. 
Modiolopsis modiolaris. 
Ambonychia carinata. 
Plants. 
Buthotrephis succulens. 
Phytopsis tubulosum. 
Corals. 
Stictopora — n. sp. 
Phenopora multipora, n. sp. 
Escharopora recta. 
Clathropora flabellata, n. sp. 
Aulopora arachnoidea. 
Graptolithus amplexicaulis. 
Crinoidea. 
Echinospherites — n. sp, 
— nov. genus. 
Brachiopoda. 
Leptna filitexta. 
L. sericea. 
L. deltoidea. 
L. tenuistriata. 
Spirifer lynx. 
Atrypa increbescens. 
Atrypa recurvirostra. 
Acephala. 
Tellinomya dubia. 
Edmondia ventricosa. 
Gasteropoda. 
Pleurotomaria umbilicata. 
P. rotuloides. 
P. subconica. 
Bucania bidorsata. 
Bellerophon bilobatus. 
Cyrtolites compressus. 
Carinaropsis — n. sp. 
Cephalopoda. 
Ormoceras tenuifilum. 
Endoceras proteiforme. 
Gonioceras anceps, (west of the limits of the district). 
Isotelus gigas. 
Illenus crassicauda? 
Calymene blumenbachii var, senaria. 
Phacops callicephalus. 
Ceraurus pleurexanthemus. 
Crustacea. 
Asaphus extans. 
A. barrandi, nD. sp. 
Harpes escanabie, n. sp. 
Lichas trentonensis. 
Cytherina fabulites, 
