190 
ZOOLOGICAL LITERATURE. 
The author commences with the Chitonidce, and treats of the 
Cyclobranchia, Ctenobranchiay Neurobranchia ( = Pulmonata oper- 
culata)j of their habits, geographical and geological distribution, 
and of the general characters and classification of the Pulmonata 
(i. e. Pulmonata inoperculata). These parts are illustrated by 17 
plates (one of which is a geographical map), and form a judicious 
and most instructive manual of malacology in its present state, 
which will be very useful, not only to the beginner, but to every 
one who wishes to inform himself of the latest discoveries in this 
branch of science. 
2. Papers published in Journals. 
a. Development and Growth. 
Lallemant, Ch. Sur le developpement et hacclimatation de quel- 
ques coquilles marines. Bull. Soc. Climatol. Algerienne, 
1^*^® annee 1864, no. 1 ; and in Journ. Conchyl. p. 306. 
Venus verrucosa is supposed to be adult at an age of eight 
months, having a length of 4-5 cm. The author has continued 
his observations for eight years ; he observed that small examples 
thrown on the beach after a gale of wind never exceeded a length 
of 10 mm. in the month of December ; in February they were 
larger, 2-2 J cm. long ; and, finally, in the months of April and 
May specimens of the normal size only are found. 
Fischer, P. Note sur la rapidite de Taccroissement des Mytilus. 
Journ. Conch. 1864, pp. 5-7. 
Mytilus edulis attains, under favourable circumstances, the 
size of 100 mm. within a year. 
Aucapitaine, H. Note sur le developpement des mollusques 
dans le port de Toulon. Journ. Conch, p. 314. 
Oysters of 8-12 mm. in length, and Balani of 8-10 mm. at the 
base, were found in a basin of the docks of Toulon, which liad 
been filled with water for thirty-two days only ; the rapid growth 
of these animals is probably to be attributed to the quality of 
the water, which receives all the effluvia of the town, and nourishes 
a large number of little Crustaceans. 
b. Teratology. 
Fischer, P. Note sur une monstruosite de Panimal du Patella 
vulgata. Journ. Conch. 1864, p. 89. 
This case is founded on an observation by M. Bert. The 
tentacle and the eye of the left side were double. Duplicity of 
the tentacles has also been observed by others in the family of 
Limnseacea, and duplicity of the eyes by Hr. Fischer himself in 
Subemarginula. The present case is remarkable, because the 
monstrosity is confined to one side only. 
