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the characters of the order Streptosauria; 7th, the development 
The illustrations accompanying this memoir are profuse and 
d v. 
li. Bulletin of the Museum of Comparative Zoology. No. ee 
Preliminary Report on the Echini and Star-ishes dredged in deep 
de Pour 
No. 10,—Preliminary Report on Ophiuride and Astrophytide; 
prepared by Turopore Lymay.—l, General remarks; II, Descrip- 
Expeditions, in 1867, 1868, 1869; by L. F. de Pourrares. é 
No. 12,—List of Holothuride from the Deep-sea dredgings of 
the United States Coast Survey; by L. ¥. de OURTALES.—These 
” e 
the distribution of the species in depth and eee wa The 
observations of Mr. Agassiz on the structure and development of 
The 
Science and Art.—The first number of this new London monthly, 
by te ‘ 
een 8vo and 4to, exclusive of advertisements. Price four- 
Pence.—Devoted to discoveries in all departments of Nature- 
