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what better for purposes of reference, if the author had added tables 
n the customary way, giving a synoptical view.of the more useful 
trigonometric formule. ‘4 : 
. A descriptive account of the Freshwater Sponges:of the Island of = 
Bombay with observations on their structure and development; by H. ~ ree 
J. Carrer, Esq., Assistant Surgeon, Bombay Establishment, 22 pages, 4 
+ 
: 8vo, with 3 plates, (from the Jour. Bombay Branéh of us Roy. Asiat. © = 5 
? Soc., No. xii, 1849.)—The author in this paper describes 5 species of — ee 
Spongilla—the S. cinerea, alba, Meyeni, plumosa, new, and the 8. fe 
- h = - 
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acterized by any particular form. The memoir - 
a respecting the structure and development of the sponge, many ae 
which 
of whic are.exceedingly curious. The memoir is illustrated by good = 
e varying forms of the bey 
engravings showin 
nge cell. 
i es 
e sponge cell, which are ex-.-"~" 
e-protean cells devel . s 
hen forcibly expelled. 
