Notes, Reviews and Comments. 205 



Canada, The species of more especial interest to Canadian readers 

 were collected by Dr. A. C. Lawson on Lake of the Woods, and by Mr. 

 J. B. Tyrrell in the vicinity of Ottawa. They are shown in the following 

 table : 



List ok Attid.*: From Canada. 



Phidippus morsitans, Walck Lake of the Woods 



Philaeus militaris Hentz Ottawa . 



Dendryphantes capitatus Hentz " 



"' " flavipedes, (N. Sp.) Peckham Ottawa? 



Icius mitratus Hentz Ottawa : 



Habrocestum cristatum Hentz Lake of the Woods 



" splendens Peckham Ottawa 



Siatis pulex Hentz " 



Neon Nellii, (N. Sp.) Peckham " 





NOTES, REVIEWS AND COMMENTS. 



Biology Wilson, Edmund B , Ph. D., etc. with the co operation 

 of Edward Learning, M. D. F. R. P. S. "An Atlas of the Fertilization 

 and Karyokitiesis of the Ovum" Columbia University Press, Macmillan 

 & Co., New York City, 4to with ten plates. This work is an admirable 

 contribution to science, with special reference to the early history of 

 the ovum of the American sea-urchin {Toxopneustes vanegatus). After 

 difficult experiments in the selection of a reagent which would 

 preserve, as Prof. C. S. Minot remarks, (Science, N. S., Vol, n. No. 47. 

 p. 695.), " the living organization of the ovum with a minimum of 

 change, hundreds of these minute eggs, all in the same stage, were 

 imbedded at once, and sectioned together, leaving chance to determine 

 that some of them be cut in favourable planes. The sections were 

 made as thin as practicable and were colored by Hardenhain's iron 

 haematoxyline stain." The " reagent was a mixture of 80 parts of 

 concentrated aqueous solution of corrosive sublimate and 20 parts of 

 glacial acetic acid." Two hundred micro photographs were taken of the 

 best sections and forty have been selected and reproduced as photo- 

 types. 



In his interesting review of Dr. Wilson's work Prof. Minot, {loc. 

 cit. supra), says: " the forty phototypes, by themselves, suffice to give a 



