222 PALAEONTOLOGY OF NEW YORK. 



In 1861 Mr. IIall described Orthoceras planoconvexum, from the Black-river 

 and Trenton groups; O. gregarium (=0. sociale, H., 1877), from the Hudson- 

 river group; and Gonioceras occidentals, from the Trenton group (Geolog. Surv. 

 Wisconsin : Rep. of Progr.) ; 0. Hageri, from the Calciferous group (Geol. of Ver- 

 mont, Hitchcock). Also 0. baculum (=0. stylus, H., 1877), 0. foliatum (=Cyrto- 

 ceras [? Gyroceras] Eugenium), O Hyas (=0. Thoas), 0. multicinctum, 0. Pelops, O. 

 tetricvm and 0. Thoas, from the Schoharie grit ; 0. profundum, from Upper Hel- 

 derberg limestone ; 0. jEgea, 0. crotahim, 0. emaceratum, 0. exile, 0. nuntium, and 

 identified O. 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. McChesnev described 0. Knoxense and 0. Rushense, from the Coal 

 Measures; 0. cameolare, 0. Hoyi, 0. irregular e (=0. Woodworthi), 0. Laphami, 

 0. lineolatum (not 0. lineolatum, Phillips, 1841), 0. nodocosium, 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 O. annulatum. 



Meek and Worthen described 0. annulato-costatum, from the Chester group, 

 Carboniferous (Proc. Acad. Nat. Sci. Phila.). 



In 1862 Mr. Billings described 0. Autolycus, from the Quebec group ; 0. Mene- 

 laus and 0. perparvum, from the Black-river limestone ; O. Piso, from the Hud- 

 son-river group; and 0. Selwyni, from the Guelph formation (Paleozoic Fossils). 



Mr. A. Winchell described 0. gracilius, from the Portage group, and 0. multi- 

 cinctum, from the Marshall group (Proc. Acad. Nat. Sci., Phila.) ; 0. arcuatellum, 

 0. Barquianum, 0. clinocameralum, 0. Marshallense and 0. robustum, from the 

 Marshall group (Amer. Journ. Sci. $• Arts, 2d series, vol. 33) ; and 0. occidentale, 

 from the Marshall group (Trans. St. Louis 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. Shumard described 0. Ozarkense, from the Calciferous 

 group (Trans. St. Louis Acad. Sci.). 



