Botany and Zoology. 431 
‘about with them so voluminous a work as the present.” Such a volume 
is much needed, and we sincerely hope that he may be able to complete 
this important and spirited undertaking. D. 67%. 
On the Skeleton of the Gare-fowl (Alca impennis), and the proba- 
bility of its being an extinct species ; by Prof. Owen.—It is assumed that 
the extinction of a well-marked species of animal is a matter of v 
great rarity in the historical times, at least as compared with prehistoric 
as good evidence of several species having become extinct within the 
last two centuries. Of these, Prof. Owen instanced the Dodo (Didus in- 
the Aptornis, in New Zealand; species of the nocturnal parrot, Nestor, 
adagascar. The Apteryx appears to be verging toward extinction in 
Proc. Zool, Soc., in the Atheneum, July 9. 
5. Synopsis of the Bombycide of the United States ; by A. S. Pack- 
arp, Jr.—Part I, From the Proceedings of the Entomolo Society 
of Philadelphia, June, 1864. pp. from 97 to 130.—This paper is a 
commencement of a “synonymical list” of the Bombycide, with ex- 
tended notes. The part here issued takes up the Lithosiidee and Arctiade. 
6. Review of American Birds, etc.; by Prof. Spencer f. DaTRD.— 
Sheets 4, 5, 6, containing pages 49 to 96 of this important work, an- 
nounced at page 303, have reached us. These finish the Turdide, and 
take up, in order, the Cinclide, Sazicolide, Sylviide, Paride, Certht- 
ade and Troglodytide. : 
a 7. Orypinehtion Stelleri—The Chiton described at page 185 of this 
volume, by Dr. Prescott, is the Cryptochiton Stelleri of Middendorf. 
