Historical Account of Testaceological Writers. 197 
shells of different genera, and also accurate descriptions. There 
are histories of new species by the same author in the Nova Acta 
Acad. Petrop., with figures. These species are Serpula Spirillum, 
Lepas cariosa, Pholas Teredula, Chiton amiculatus, and Helix 
coriacea. 
The 64th volume of the Philosophical Transactions contains some 
curious facts relative to what has been called the reviviscence of 
snails, communicated to the Royal Society by 
DR. MACBRIDE. 
This is a subject more particularly interesting to the physiolo- 
gist, but cannot be considered as foreign to the science of Testa- 
ceology in general. 
The following year the celebrated 
BONNET 
published some experiments on the regeneration of the head of 
the common Land-snail, which appear among his other works. 
These experiments were pursued likewise by Muller in the Journ. 
de Physique, and by 
J. AND. MURRAY, 
in a Programma, at Gottingen, the year after Bonnet's observa- 
tions appeared. 
This is the proper place to notice the labours of our countryman 
PENNANT, 
whose British Zoology is the earliest work professing to treat of 
the animals of our island after the Linnean method, and who 
ought, therefore, to be considered as having commenced a new 
sera among English naturalists. The three first editions of this 
work, 
