222 
PALAEONTOLOGY OF NEW YORK. 
In 1861 Mr. Hall described Orthoceras planoconvexum , from the Black-river 
and Trenton groups; 0. gregarium (= 0. sociale, H., 1877), from the Iludson- 
river group; and Gonioceras occidentale, from the Trenton group ( Geolog. Surv. 
Wisconsin: Rep. of Progr.); 0. Hageri, from the Calciferous group (Geol. of Ver¬ 
mont, Hitchcock). Also 0. haculum (=0. stylus, H., 1877), 0. foliatum ( =Cyrto - 
ceras [? Gyroceras] Eugenium ), 0 Ilyas (=0. Thoas), 0. multicindwn, 0. Pelops, 0. 
tetricum and 0. Thoas, from the Schoharie grit; 0. profundum, from Upper Hel- 
derberg limestone; 0. YEgea, 0. crotalum, 0. emaceratum, 0. exile, 0. nuntium, and 
identified 0. perelegans of Salter, with doubt, from the Hamilton group (New 
Species of Fossils, pp. 45-52, and republished in 1862 in the Fifteenth Rep. on 
N. Y. State Cab. Nat. Hist, pp. 73-80). 
Mr. J. H. McCiiesney described 0. Knoxense and 0. Rushense, from the Coal 
Measures; 0. cameolare, 0. Hoyi, 0. irregulare (— 0. Woodworthi ), 0. Laphami, 
O. lineolatum (not 0. lineolatum, Phillips, 1841), 0. nodocostum, 0. Scammoni, 0. 
striatolineatum and 0. Woodworthi, from the Niagara group (New Pal. Foss.). In 
a revision of this publication by Mr. Meek, two Silurian species of Orthocera- 
tites, viz., 0. Woodworthi and 0. nodicostatum, are recognized. The last named is 
undoubtedly 0. annulatum. 
Meek and Worthen described 0. annulato-costatum, from the Chester group, 
Carboniferous (Proc. Acad. Nat. Sci. Phila.). 
In 1862 Mr. Billings described O. Autolycus, from the Quebec group; 0. Mene- 
laus and 0. perparvum, from the Black-river limestone; 0. Piso, from the Ilud- 
son-river group; and 0. Selwyni, from the Guelph formation (Palaeozoic Fossils). 
Mr. A. Winciiell described 0. gracilius, from the Portage group, and 0. multi- 
cinctum, from the Marshall group (Proc. Acad. Nat. Sci., Phila .); 0. arcuatellum, 
OI Barquianum, 0. clinocameratum, 0. Marshallense and 0. robustum, from the 
Marshall group (Amer. Journ. Sci. Sf Arts, 2d series, vol. 33); and 0. occidentale, 
from the Marshall group (Trans. St. Fouis Acad. Sci.). 
The species described by Mr. Hall, and published in 1861, were republished 
in this year in the Fifteenth Report on N. Y. State Cab. Nat. Hist., pp. 73-80. 
In 1863 Dr. B. F. Siiumard described 0. Ozarkense, from the Calciferous 
group (Trans. St. Louis Acad. Sci.). 
