Tr(ipid()i.f.i'tus Fauna at Cananuaigua Lake, N. V. 175 



Specimens of this species are quite common, although usually of 

 small size. The species is common in all sections except in the 

 eastern counties where it is rare except locally. 



Cyprceus boothi Green. 



Pal. N. Y., Vol. VII, p. 42, pis. 16, i6(?. 



Specimens of this species were common. The species is common 

 from Thedford to Otsego county. 



REFERENCES. 



Beecher, C. E. Origin and Significance of Spines. Am. Jour. Sci. (4), VI, 1898. 

 Development of the Brachiopoda. Am. Jour. Sci. (3), Vol. 42, 1891, and 



Vol. 44, 1892. 

 Some Correlations of Ontogeny and Phylogeny in llic Brachiopoda. Am. Nat., 



July, 1893. 

 AND Cl.'\RKE, J. M. The Development of some Silurian Brachiopoda. 



Memoirs of the New York State Museum, Vol. I, No. I, Oct. 1889. 

 and Schuchert, C. Development of the Brachial Supports in Dielasma and 

 Zygospira. Proc. Biol. Soc. Wash., Vol. 8. 

 Clarke, J. M. A Brief Outline of the Geological Succession in Ontario Co., New 

 York. Ann. Rept. N. Y. State Geol., 1884. 

 The Succession of Fossil Faunas in the Section of the Livonia Salt Shaft. 13th 



Ann. Rept., New York State Geol., 1894. 

 The Marcellus Limestone of Central and Western New York. Bull. N. Y. State 

 Museum, No. 49, Dec, 1901. 

 Cleland, H. F. a Study of the Fauna of the Hamilton Formation of the Cayuga 

 Lake Section in Central New York. Bull, of the U. S. Geol. Survey, 206, 

 1903. 

 Cl'MlNGS, E. R. Orthothetes minutus n. s. from the Salem Limestone of Harrods- 

 burg, Ind. Am. Geol., Vol. XXVII, Mar. 1901. 

 The Morphogenesis of Platystrophia. A Study of the Evolution of a Paleozoic 

 Brachiopod. Am. Jour. Sci., Vol. XV, 1903. 

 Grahau, a. W. The Faunas of the Hamilton Group of Eighteen Mile Creek and 

 Vicinity in Western New York. i6th Ann. Rept., State Geol. N. Y., 1898. 

 Gr.-\bau, a. W., and Shimer, H. W. The Thedford (Ont.) Section. I'.ull. (Jeol. 



Soc. Am., Vol. 13, pp. 149-186, June, 1902. 

 Hall, James, and Clarke, J. M. Brachiopoda. Pal. N. Y., Vol. 8, Parts i 



and 2, 1892. 

 (]Ehlert, D. p. Ann. des Sciences Geologic, Vol. XIX. 



Morse, E. S. Early Stages of Terebratulina septentrionalis. Mem. Bos. Soc. Nat. 

 Hist., II, Pt. I, No. I, 1871. 

 Observations on the Living Brachiopoda. Mem. Bos. Soc. Nat. Hist., V, No. 

 8, 1902. 

 Prosser, C. S. The Devonian System of Eastern Penn. and New Y'ork. U. S. 

 Geol. Survey, Bull. 120, 1894. 

 12 



