206 The Ottawa Naturalist. 



complete history of the maturation, fertilization and early segmen- 

 tation of the ovum," and continues by pointing out that although less 

 clear than published drawings they are absolutely accurate and free 

 from that element of personal interpretation which is unavoidable in 

 every drawing no matter how conscientiously made 



The work is most welcome to all students ot biology in whatever 

 department or field of research they may be working ; and the authors 

 can congratulate themselves upon this most important contribution to 

 pure science. 



Geology Whiteaves, J. F. "Notes on some fossils from the 

 Cretaceous Rocks of British Columbia, with descriptions of two species 

 that appear to be new." Can. Rec. Science, April, 1895, 5 pp. Plate II. 

 Contains descriptions of three species of Cretaceous fossils from Hornby 

 and Denman Islands, in the Straits of Georgia. They were collected by 

 Mr. Walter Harvey of Comox, V. I. and sent to Mr. Whiteaves for 

 determination. The species are : 



(1) Anisoceras Vancouverense, Gabb sp. a species closely related 

 to Hamites Fiemontii, M.ircou, and also to Anisoceras armatum of 

 Sowerby. Mr. Whiteaves further states " that the fragment from Comox 

 described and figured by Meek as Heteroceras Cooperi, is probably a 

 small piece of the abruptly hent part of Anisoceras Vancouverense. 



(2) Heteroceras Hornbyense. This provisional name is given to the 

 broad turbinate and dextral shell from Hornby Island, B.C. discovered 

 by Mr. Walter Harvey in 1894. In discussing the relations between 

 Heteroceras and Anisoceras Mr. Whiteaves states: " It is, perhaps, 

 doubtful whether the distinctions between Heteroceras and Anisoceras 

 can be maintained. In the one the earlier volutions are said to be 

 in contact while those of the other are described as separate and as 

 forming an irregular open spiral." .... It is also suggested that 

 H. Hornbyense Whvs., may possibly be the early stage of large 

 individuals of the preceding species." 



(3) Heteroceras perversion. A sinistral shell but in other 

 respects similar to H Hornbyense, Whvs. from Hornby Island, B. C. 

 collected by Mr. W. Harvey, 1894. 



