30 MEMOIR OF PALLAS. 
We must not stay to make any remark on his de- 
scription of a crane, his Grus crepitans, the golden- 
breasted trumpeter of Linnzeus ; neither shall we say 
a word on the insects he describes, species of Onisci, 
of a marine Acarus, and of the Cicada; nor shall 
we dwell upon several zoophytes, actinia, and pen- 
natule, which he again introduced to notice; but 
shall add, that to more than any, or than to the 
whole of the foregoing, inclusive, he directed his 
attention to the great class Mollusca, which our 
readers will remember immediately succeeds the 
vertebral animals, and precedes insects ; and includes 
shell-fish, worms, &c. We repeat, that more than 
one half of the Miscellanea is devoted to this most 
interesting and difficult class; and with a degree 
of acuteness and success which was scarcely inferior 
to that which attended his researches regarding 
zoophytes. 
We dwell the longer on this volume, because we 
conceive that, from a variety of causes, it has not 
taken that rank in general estimation to which it is 
fully entitled. One reason of this appears to have 
been, that the author almost immediately afterwards 
brought out a second edition, we may call it, of that 
part of the volume which treated of quadrupeds in 
his Spicilegia Zoologica, although much is omitted 
in this latter which appears in the former: and ano- 
ther and equally influential cause is to be found in 
the difficulty of the investigation connected with the 
mollusca. As our space does not allow us to dilate, 
we shall simply state, that he dwells at considerable 
