584 NEW YORK STATE MUSEUM 



53 Cliarles Lapwortli in Job. Walther. Ueber die Lebensweise fossiler 

 Meeresthiere. (Zeitscbr. Deutscb.- geol. gesellscb. 1897. p. 209-73> 



04 Ferd. Boemer & Fritz Ftech. Letbaea geognostica, 1 Tbeil; 

 Letbaea palaeozoica. 1897. 1 Bd. 3 Lief.; 2 Bd. 1 Lief. 



65 Rudolf Ruedemann. Evidence of current action in tbe Ordovician 

 of New York. (Amer. geologist. 1897. v. 19, no. 6, p. 367-91). 



56 C. S. Prosser & E. R. Cumings. Sections and tbickness of tbe 

 Lower Silurian formations on West Canada creek and in tbe 

 Mohawk valley. (15tb an. rep't N. Y. state geologist. 1897. 

 1:615-59) 



67 F. W. Sardeson. Tbe Galena and Maquoketa series, pt 2. (Amer, 



geologist. 1897. 19:21-36) 



68 C. R. Van Klse. Estimates and causes of crustal shortening. (Jour. 



geol. 1898. 6:10-64) 



69 F. C. Cbamberlain. A systematic source of evolution of provincial 



faunas. (Jour. geol. 1898. 6:597-609) 

 60 Stuart Weller. Tbe Silurian fauna interpreted on tbe epicontinental 

 basis. (Jour. geol. 1898. 6:692-703) 



01 R. P. Whitfield & F. O. IHbvey. Catalogue of tbe types and figured 



specimensi in tbe paleont. collection of tbe geol. depart, Amer. mus. 

 nat. bist. (Bui. Amer. mus. nat. bist. 1898. v.ll. pt 1) 



02 J. M. Clarke & Charles Schucbert. Nomenclature of tbe New 



York series of geological formations. (Science. 1899. 10:874-78) 

 63 T. N". I>ale. Tbe slate belt of eastern New York and western Ver- 

 mont. (19th an. rep't U. S. geol. sur. 1899. pt 3. p. 159-306) 



