132 THE NAUTILUS. 



the second to Oreohelix strigosa. Together with Dr. Steams' previous 

 report on John Day land shells {Science, 1902, 153), this paper is of 

 great interest, showing the antiquity of the present generic groups of 

 land shells, which were manifested in forms not unlike those now ex- 

 isting in the same region, as far back as the miocene H. A. P. 



Catalogue of tiie Mollusca of Illinois. By Frank Collins 

 Baker (Bull. of. the 111. State Laboratory of Natural History, VII, 

 article 6, 1906). This catalogue " is intended to record every refer- 

 ence to the mollusca occurring in the state, which may be found in 

 the published lists, and also all scattered references wherever pub- 

 lished." Under each species the author quotes every locality from 

 which specimens have been recorded, giving the authority for each 

 in parenthesis. 241 aquatic and 91 terrestrial species are recorded. 

 No less than 28 species and varieties have been based upon Illinois 

 specimens, seven of them being now considered synonymous. From 

 only ten counties, says Mr. Baker, have careful lists been made. In 

 this catalogue records have been obtained from 69 counties, of from 1 

 to 145 species. What has been done, and the great amount of work 

 still to be done, is graphically shown in the map. The richest portions 

 of the State, along the Wabash and Ohio rivers, are still very little 

 known; but in the upper counties several energetic naturalists have 

 thoroughly worked up the fauna, so that this first attempt at a State 

 catalogue is very creditable to the author, as well as the other natur- 

 alists, Messrs. Ferriss, Hinkley, Handwerk, Marsh, Nason, Strode, 

 Hart and others, who have contributed records. 



It is inevitable in a first attempt to cover so large an area, that 

 some doubtful records, demanding careful verification, must be in- 

 cluded, and this catalogue is naturally no exception. Baker and 

 his co-workers will doubtless now set about the task of investigating 

 these questionable records. A paper by Prof. Shimek on his inves- 

 tigation of Pyrgulopsis in Rock River seems to have been overlooked. 

 Together with Baker's " Mollusks of the Chicago Area," this cata- 

 logue forms an excellent basis for further work in Illinois. 



The Fossil Mollusca of Florissant, Colorado. — By T. D. 

 A. Cockerell (Bull. Amer. Mus. Nat. Hist., xxii, 1906). The fol- 

 lowing species are described as new. Omphalina (?) laminamm, 

 Planorbis florissantensis, Lymnaa sieverti, scudderi, Sphcerium jior- 

 issantense. The new name Columna haydeniana is proposed for 

 Bulimus teres M. & H., not Olivier. 



