420 THE AMERICAN NATURALIST. [Vol. XXXVIII. 



21. The Development of Some Silurian Brachiopoda, [by Charles E. 

 Beecher and John M. Clarke]. Mem. N. Y. State Mus. Oct., 1889. 

 Vol. I, no. I, 4to, p. 1-95, fig. 1-4, pi. 1-8. 



[Reprinted.] Studies in Evolution, 1901, p. 310-398, fig. 126-130, pi. 



1890. 22. On the Lingual dentition and Systematic position of Pyrgula. 

 Jour. N. Y. Mic. Soc. Jan., 1890. Vol. 6, p. 1-3, pi. 21. 



Hyatt. Amer. Jour. Sci. July, 1890. Ser. 3, vol. 40, p. 71-75, pl- 

 [Reprinted.] Studies in Evolution. 1901. p. 435-440, pi. 34. 



Ser. 3, vol. 40, p. 21 1-2 19, fig. I, pi. 2. 



25. On Leptaenisca a new genus of Brachiopod from the Lower Helder- 

 berg group. Amer. Jour. Sci. Sept., 1890. Ser. 3, vol. 40, p. 238-240 

 and 245, pi. 9. 



26. North American species of Strophalosia. Amer. Jour. Sci. Sept., 



1890. Ser. 3, vol. 40, p. 240-246, pi. 9. 



27. Phylogeny of the Pelecypoda, the AviculidcE and their Allies, by 

 Robert Tracy Jackson. [Review.] Amer. Jour. Sci. Nov., 1890. Ser. 

 3, vol. 40, p. 421-422. 



28. Contributions to the Tertiary Fauna of Florida, by Wm. H. Dall. 

 [Review.] Amer. Jour. Sci. Nov., 1890. Ser. 3, vol. 40, p. 423. 



29. On Syringothyris Winchell, and its American species, by Charles 

 Schuchert. [Review.] Amer. Jour. Sci. Nov., 1890. Ser. 3, vol. 40, 



1891. 30. (I) New Types of Carboniferous Cockroaches from the Car- 

 boniferous Deposits of the United States; (2) New Carboniferous 

 Myriapoda from Illinois; (3) Illustrations of the Carboniferous 

 Arachnida of North America, of the orders Anthracomarti and 

 Pedipalpi; (4) The Insects of the Triassic beds at Fairplay, Colo- 

 rado; by Samuel H. Scudder. [Review.] Amer. Jour. Sci. Jan., 



1891. Ser. 3, vol. 41, p. 72. 



31. Bulletin from the Laboratories of Natural Histor>- of the State 

 University of Iowa. Vol. 2, no. i, p. 1-98, pi. T0-12, 1890. [Review.] 

 Amer. Jour. Sci. Jan., 1891. Ser. 3, vol. 41, p. 72. 



32. Insecta, by Alpheus Hyatt and J. M. Arms. [Review.] Amer. 

 Jour. Sci. March, 1891. Ser. 3, vol. 41, p. 256-257. 



33. James CroU [Obituary]. Amer. Jour. Sci. March, 189 1. Ser. 3, 

 vol. 41, p. 258. [Not signed.] 



