Historical Account of Testaceological Writers. 17 1 
of Serpula, Dentalia, &c. In the general collection of his works 
we find a description of the Sable coquillier, or shelly sand found 
at Zalbach, near Calais (torn. 2. p. 21 — 22.); also a long disserta- 
tion on tubular substances found in the sea, which is accom- 
panied by a scheme of arrangement. — The last of this author's 
memoirs which it falls within our province to mention is on the 
subject of Lepas anatifera. The history of this animal is very 
diffusely given in the 4th volume of the collection. M. Guettard 
remarks upon the accounts given by authors from the earliest 
times, tracing out the origin of the fabulous narratives that were 
copied from one to another respecting that singular species. 
In the Transactions of the Electoral Academy of Mentz, the 
only writer who has treated of shells is 
JOHN FREDERIC HOFFMAN. 
Two of his communications relate to species resembling the Comu 
Ammonis, which, in fact, he describes as being found in a native 
state; but, though a Nautilus, the shell he alludes to cannot pro- 
perly be considered as being the same with that fossil. The 
** Tubuli vermicular es Cornua Ammonis referentes" (described in 
p. 16 — 20.) are minute shells, similar, many of them, to what had 
been before noticed by Plancus. The 2d volume of these Trans- 
actions contains a paper from the same author descriptive of 
Helix auricular ia, the animal of which species, as well as the 
shell, is minutely noticed. 
COUNT JOSEPH GINANNI, 
of Ravenna, rendered himself well known to the lovers of Tcsta- 
ceology by two considerable works which treat of that subject 
very largely. The Opere Postume contains a description of the ma- 
ritime, marsh, and terrestrial Testacea of the territory of Ravenna, 
z 2 after 
