or ARTS AND SCIENCES. 31 



Alloprosallocrinus depressus, Sp. Nov. 



The general arrangement of the pieces of the calyx differs but 

 little from A. conicus. There are, however, several distinguishing 

 characteristics, rendering it necessary to separate it from that species. 



A. depressus is always unsymmetrical, the mouth being subcentral 

 and placed nearest to the anterior side. The postero-lateral rays 

 always bear three arms each. The summit is always depressed or 

 inclined to the anterior side, and the columnar pit is more angular 

 than in A. conicus. 



Dimensions : — 



Greatest diameter ...... 1.05 inch. 



Least diameter ....... .85 " 



Height (proboscis broken off) .... .42 " 



Geological position and locality. Found in considerable numbers 

 near the top of the silicious mud-beds of the subcarboniferous lime- 

 stone, Clear Creek, Hardin County, Kentucky. 



DONATIONS TO THE LIBEARY, 



FROM APRIL 15, 1859, TO MAY 29, 1860. 



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Memoires et Documents relatifs a I'Histoire du Canada. 8vo 

 Pamph. Montreal. 1859. 

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Canadian Naturalist and Geologist, and Proceedings of the Nat. 

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Proceedings. 1855 - 58, 1858 - 60. Selected from the Records. 

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Catalogue of the Library. Vol. L A-L. Vol. 11. M-Z. 

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 Journal. Vol. VII. No. 1. 8vo. Boston. 1859. 

 Observatory of San Fernando. 



Almanaque Nautico para el Afio 1860. Calculado de Orden de 

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