256 



etc. 1. Abth. 51. Lief. Handwörterbuch der Zoologie, Anthropologien. 



Ethnologie. 20. Lief. Breslau, E. Trewendt, 1887. 8". Ji 3,—. 

 Knauer, Frdr., Handwörterbuch der Zoologie. Unter Mitwirkung von Prof, 



K. W. V. Dalla Torre. Mit 9 Taf. Stuttgart, Enke, 1887. 8". (XIV, 



828 p.) Ji 20, — . 

 Marshall, A. Milnes, and 0. Herbert Hurst, A Junior Course of Practical Zoo- 

 logy. London, Smith, Elder & Co., 1887. 8». (421 p.) 

 Perrier, Edm., Notions de Zoologie. (Programme de 1886 pour l'enseignement 



secondaire spécial). 3. édit. Paris, Hachette & Co., 1887. 12". (341 p., 



avec figg.) 2 Frcs. 50 es. 



6. Biologie, Vergi. Anatomie etc. 



Haacke, Wilh,, Biologie, Gesammtwissenschaft und Geographie, in : Biolog. 



Centralbl. 6. Bd. No. 23. p. 705—718. 

 Collins, F. Howard, Vitality and its Definition. in: Nature, Vol. 35. 



No. 912. p. 580—581. 



Mr. Herbert Spencer's Definition of Life, ibid No. 908. p. 487. 



Judd, John W., Vitality, and its Definition, in : Nature, Vol. 35. No. 909. 



p. 511. 

 La Cellule. Recueil de Cytologie et d'Histologie générale publié par J B. 



Carnoy, G. Gilson, J. Denys. T. 3. 1. Fase. Louvain, Peeters ; 



Gand, Engelcke ; Liège, Jos. van In & Co., 1887. gr. S". Jl 16, — . 

 Jaworowski, A., Endogenous Cell-multiplication. Abstr. in: Journ. R. Microsc. 



Soc. London, 1887. P. 1. p. 48—49. 



(Akad.Krakov.) — s. Z. A. No. 224. p. 326. 

 Tenbaum, . ., Über die Gesetzmäßigkeit bei der Bewegung der Beine im 



Thierreich. in: Zool. Garten, 27. Jahrg. No. 12. p. 361—366. 

 Cattaneo, G., La Fisiologia comparata della digestione, in : Boll. Scientif. 



(Maggi, Zoja etc.) Ann. 9. No. 1. p. 22—28. 



II. Wissenschaftliche Mittheilimgen. 



1. On the Eyes of Molluscs and Arthropods. 



By W. Patten, Milwaukee, Wise. 



eingeg. 1(5. März 1887. 



In the last number of the Quarterly Journal of Microscopical 

 Science appears a »review^ of my paper on the Eyes of Molluscs and 

 Arthropods. 



I have no desire to enter into any controversy with my critic about 

 my laboratory associates in Europe, or to discuss with him matters of 

 a personal nature in the pages of a scientific journal; nor is it my pur- 

 pose to defend either my observations or my theoretical suggestions, 

 but simply to indicate a few points in which my critic has failed to 

 apprehend or represent clearly my position. 



1) The larger portion of my observations, embracing discoveries 

 which served as a guide in my studies upon the Arthropod eye, are 



