180 Dr. Maton's and Mr. Rackett's 
particularly rich in insects and shells, he was enabled to afford 
abundant information to the lovers of both these orders of the 
animal kingdom. The Museum Lndovica Ulrica Regina may be 
considered as the best of Linnaeus's Testaceological works, and, 
as it is so frequently quoted in the Sy sterna, becomes, though 
now very scarce in this country, of indispensable utility to the 
scientific student. It describes 434 species of shells, and the re- 
marks subjoined to the definitions of each are admirable for their 
precision, minuteness, and regularity. This volume was pub- 
lished in 1764 ; but, though posterior in date to that of the 10th 
edition of the Syst. Nat*, it retains the old divisions of Concha and 
Cochlea. The last of Linnaeus's works, viz. the Mantissa altera, 
contains thirty-five species not described in any of the books al- 
ready mentioned. — It ought to have been remarked in an earlier 
part of this account, that our great author's Travels contain de- 
scriptions of several species of Testacea at considerable length; 
but, from the language in which these were written, they are of 
little use to the English reader. The Iter Westro-gothicum con- 
tains one plate of shells, which, however, represents the univalves 
reversed, as if they were all heterostrophous. 
In regard to the terms and peculiar descriptive manner adopted 
by Linnaeus in this part of his labours, they are no less surprising 
for their happy expressiveness, appropriateness, and utility of 
application, than in other departments of the science of nature, to 
which he gave the same new aspect and stability of reformation. 
They constitute a language of his own, — a language so eminently 
subservient to the purposes for which it was calculated, that it 
would alone be sufficient to mark the superior genius of Linnaeus. 
At the same time we cannot hesitate to confess, that a few of 
these terms, however strongly they may be warranted by the si- 
militudes and analogies which they express, and which when so 
pointed 
