Botany and Zoology. 127 
pearance and structure ; secondly, the four or five, free, boat-shaped, 
larves, with their curious prehensile antenna, two great compound eyes, 
fo mouth, and six natatory legs; and lastly, several hundreds of the 
larvee, in their first stage of development, globular, with horn-shaped 
Projections on their carapaces, minute single eyes, filiform antenne, 
Probosciform mouths, and only three pairs of natatory legs ; what di- 
Verse beings, with scarcely anything ia common, and yet all belong to 
the same species !” 
t. Darwin has also published a monograph on the Fossil Lepadide 
of Great Britain-—88 pp. 4to, with 5 plates. London, 1851. Printed 
for the Palzontographical Society. 
8. Dr. A. Binney’s Terrestrial Air-breathing Molluses.t— 
the onward movement of American zoology, conchology has not only 
Occupied a prominent place, but its cultivators have kept it modernized 
by wisely following the French rather than the English, and one of the 
Tesults of this has been, for example, that the genus Paludina has been 
called Helix. in English conchological works twenty years after the 
error had been relinquished forever in France and America—an error 
So great, that we cannot conceive how it could have maintained its po- 
Sition a single day after its erection as a distinct genus. ; 
Binney had an excellent general knowledge of conchology — 
Zoology, and in undertaking a complete history of the land Mollusca o} 
this country, he did it with a full appreciation of the difficulties of the 
#** Tn 
we . it jeg, 1848,) p. 153, Pl. vi. Mr. Dal- 
Apnale of Natural History’ (vol. i, 24 series ttaa subject, in the * Philo 
is another Memoir by Mr. Gosse in 
