170 Dr. Maton's and Mr. Rackett's 
JO. HENR. COHAUSEN 
was the author of a "Conspectus Sciographicus Testaceorum" There 
cannot, however, be a more strange and unscientific arrangement 
of shells than the one here proposed; nor can it answer the pur- 
pose of any person to whom the descriptions of Pliny, Buonanni, 
and Rumphius are familiar, to consult it. 
A considerable work on shells was published in the year 1755, 
The author, 
NICHOLAS GEVE, 
does not give any scientific names, nor is his description of much 
use to a scientific reader ; though there are some good references 
in the notes. He employs both the German and the French lan- 
guages, and is very diffuse. The plates are the most valuable 
part of the work, being thirty-three in number, and containing 
434 coloured figures, which are in general correct. 
DR. WHYTT 
was author of a description of the ovary of the Buccinum ampul" 
latum. This description is accompanied by figures. 
Two memoirs on the subject of Testacea were laid before the 
French Academy by 
GUETTARD, 
well known by various other interesting tracts on different 
branches of natural history. The first of these memoirs is enti- 
tled " Observations qui peuvent servir & former quelques Caracteres 
de Coquillages." Fourteen genera are here described, founded on 
the nature of the contained animals. The second memoir is " sur 
le Rapport quil y a entre les Coraux et les Tuyauoc Marins 9 et entre 
ceux-ci et ks Coquilles" To this are annexed five excellent plates 
of 
