172 Dr. Maton's and Mr. Rackett's 
after a system somewhat similar to Buonanni's, and in the Italian 
language. These different tribes are distributed into three cor- 
respondent treatises, the first of which is accompanied by thirty- 
one plates, the second by four, and the third by three only. The 
engraving is slight ; but there is a correctness of design in most of 
the figures, and several new species are contained among them. 
A like character may be given of those which accompany the 
other work, descriptive of the museum formed by his uncle Count 
Francis Ginanni, for which he had prepared most of the mate- 
rials, though its publication did not take place until five years 
after the former. It is illustrated by two plates of Testacea, which, 
under the head of " Corpi che stanno in Mart" are described 
agreeably to the system contained in the Opere Postume. There 
are pretty numerous references to preceding writers, which con- 
siderably assist readers unacquainted with the Italian language. 
In the same year with the re-publication of the fine work of 
D'Argenville, the French had to boast of another author of their 
nation rendering singular service to the study of the Testacea; this 
was 
ADANSON, 
who, in his " Histoire Naturelle du Senegal," has presented us with 
an accurate description of shells figured in sixteen plates. It is 
prefaced by an account of the author s travels in the years 17^9, 
1750, 1751, 1752, and 1753. There is also a general history of 
Testaccology, and an arrangement of species invented by himself. 
This arrangement rests principally on circumstances connected 
with the structure and habits of the animals ; on which subject 
Adanson is more diffuse and particular than almost any person who 
preceded him. His general divisions of Testacea are Limacons and 
Conques; the first of these comprehending his Univalves and Opercu- 
Ues, the second Bivalves said Mnltivalves. His species are only 185 
in 
