Aliscel/uneous. 



443 



in the above extract, which is ilhistratcd by some admirable plates of 

 Tortoises by Mr. G. II. Ford; and such is also the excellent Catalogue 

 of the Papi/io)tiUce not long since brought out by Mr. G. 11. Gray, 

 which contains coloured tigures of the new species described. We 

 must therefore echo His Imperial Ilighness's expression of thankful- 

 ness to the Trustees for placing within our reach, at a moderate price, 

 such a mass of valuable zoological literature. 



lu connexion with this subject we may also call attention to the 

 vast additions which have been made to the zoological collections in 

 the Museum in the course of the last twenty years, but especially 

 since 1840, as shown in the following table, derived from the Parlia- 

 mentary returns, as this more than anything will serve to show, not 

 only the energy disj)layed in the conduct of the Department, but 

 also the abundance of materials at the disposal of the aiithors of the 

 different catalogues to enable them to render their works as perfect 

 as possible : — 



Additions made to the Zoological Collections in the British Museum 

 during the years 1836 to 1855 inclusive. 



Note on the Development of the Lampreys. 



By M. SCHULTZE. 



The author has examined the development of the ova of Petromyzon 

 Planeri, which occurs commonly in a small brook near Berlin. The 

 ova were artificially impregnated. The mature ova are white and 



