Historical Account of Testaceological Writers, 209 
tomist has distinguished himself by other dissections ofTestacea, 
which will be found in the Annates du Museum National, and 
which we have much satisfaction in particularizing. His first 
memoir in that journal relates to the animal of Lingula anatina of 
Lamarck (Patella Unguis of Linnams), the parts of which are ad- 
mirably exhibited in the 17th plate. In the subsequent number 
Bulla aperta {Bullcea of Lamarck) is described and figured with 
equal ability. It is by such minute and accurate examinations 
that species are definitively fixed, and we cannot forbear express- 
ing a hope that M. Cuvier will continue to present us witli other 
examples of the successfulness of his researches among this still 
imperfectly known order of animals. 
Several minute and other shells not before known are de> 
scribed in the Trans, of the Linn, Soc. by 
JOHN ADAMS, 
who discovered them on the coast of Pembrokeshire. The de- 
scriptions, which are perfectly scientific, are accompanied by 
figures. In mentioning the name of Mr. Adams, the authors of 
the present paper, who were so fortunate as to enjoy his corre- 
spondence on Testaceological subjects, cannot omit paying a tri- 
bute of respect to his memory, from having witnessed the enthusi- 
asm and perseverance with which he pursued the study of nature; 
nor can they help reminding their fellow-members of the loss they 
sustained in the untimely death of one who gave such unequivo- 
cal proofs of usefulness and ability. 
It is a task as laborious as it is unlimited to push the examina- 
tion of natural objects beyond the ordinary powers of the senses; 
and it may, perhaps, be questioned by some, whether such pur- 
suits lead to any useful practical purposes : yet the supplying of 
vol. vii. 2 E links 
