158 AMERICAN JOURNAL 



A large part of Dr. Stimpson's paper is occupied by inter- 

 esting detailed descriptions of the animals of several of the 

 species, with figures illustrative of their lingual armature, 

 generative organs, ova-capsules, etc. 



Among the interesting discoveries made by the author is 

 the fact that Amnicola Nickliniana (and most probably the 

 allied species tenuipes, Binneyi, turhiniformis, intermedia, etc.), 

 are congeneric with Bithinella (the European fresh water Hy- 

 drohioe). And that the globular species which, from a cursory 

 examination of the shell alone, would be all referred to Prof. 

 Gill's genus Somatogyrus, really constitute three genera, Flu- 

 minicola, type Pal. Nultalliana, Lea; Oillia, type Mel. altilis, 

 Lea ; and Somatogyrus, type *S'. depressus, Tryon. 



The last part of the paper contains systematic diagnoses of 

 the genera of Hydrohiinse, with partial lists of the species.* 

 Among these genera are the following new ones, all of which 

 were first described in this Journal (vol. i., p. 54, et seq.) : 

 Tryonta, Potamopyrgus, Cochliopa, Oillia, Pluminicola. 



This important work may be obtained without charge by 

 addressing the Smithsonian Institution. 



Proceedings of the Academy of Natural Sciences of Philadel- 

 phia, No. 5. Nov. and Dec, 1865. 



Gontrihutions to the Palseontology of Illinois and other 

 Western States. BY F. B. MEEK and A. H. WORTHEN. 



Lithophaga? pertenuis. Tentacvlites Sterling ensis. 



" lingualis, Phillips? Orthoceras crehristriatum. 

 Modiolopsis perovata. " suhhaculum. 



Pleurophorus suhcostatus. " Jolietense. 



" angulatus. " nohile. 



" costati/ormis. " Winchellii. 



Grammysia rhomboidalis. Phragm,oceras Walshii. 



Gonocardium ohliquum. Oomphoceras sacculum. 

 Edmondia peroblonga. " turhiniforme. 



Ghsenomya rhomhoidea. Nautilus peramplus. 



" hybrida. " Niotensis. 



Sedgwickin subarcuata. " Lasallensis. 



Isonema depressa. Discites ornatus. Hall, var. am- 

 Pleurotomaria meta. plus. 



Conularia multicostata. " disciformis. 



'' subcarbonaria. Gryptoceras capaxf 



" Whitei. " Leidyi. 



Tentaculites tenuistriatus. Trochoceras ? Baeri. 

 Tentaculites Oswegoensis. 



* We much doubt the pertinence of Paludestrina lapidum and P. perig- 

 tomata, D'Orb., to the genus Lithoglyphus. 



