FAMILY 1. LIMACINEA. 61 
partially reflected over the sides, and the vertex is rather blunt, there 
being no spire. 
Example. 
Pl. CLX. Fig. 1 to 3. 
Limax ANTIQUORUM, Sowerby, Genera of Shells, No. 41. 
TESTACELLUS, Draparnaud. 
Testa externa, subauriformis, epidermide tenui induta, ad extremitatem 
posticam animalis affixa; apice feré obsoleto, brevissimé spirato ; 
apertura oblonga, amplissima ; labio externo, integro ; interno in- 
crassato, involuto ; impressione adhzesionis transversa, lunatim ob- 
longa. 
The Parmacelle, the Limaces, and the Testacelli, are all closely allied by 
their general anatomy, but the variation in the position of the branchial 
cavity is curious and important. In the Parmacelle, as we have already 
shown, it is situated about the middle of the body, and in the Limaces 
it is towards the anterior part; but in the animals which come under 
our present consideration, the respiratory cavity is posterior, so that the 
shell, which is always external in the Testacelli, is fixed as it were to the 
tail. 
It may be described as being somewhat ear-shaped, and covered with 
a thin epidermis ; it has a very short spiral apex, which is almost obso- 
lete, and the aperture is of an oblong form, and very large; the outer 
lip is entire, the inner lip thickened, and rolled inwards ; the impression 
which is left in the shell by its muscular attachment, is of a lunate-oblong 
shape. 
The Testacelli are carnivorous, and feed for the most part upon earth- 
worms. 
