MOLLUSCA OF INDIA. TT 
bited. It comprised forty species, and was accompanied by a de- 
scriptive list prepared by the donor, and also by detailed notices of 
some of the more interesting among them. These notices were 
read; they are intended by Mr. Benson for publication in the forth- 
coming number of the ‘ Zoological Journal.’ From the time that he 
first became acquainted with the animal of a shell, resembling in all 
respects, except in its superior size, the European Helix lucida, Drap., 
Mr. Benson regarded it as the type of a new genus of Helicide, in- 
termediate between Stenopus, Guild., and Helicolimaw, Fér. He 
had prepared a paper on this genus, for which he intended to pro- 
pose the name of Zanychlamys ; he finds, however, that Mr. Gray 
has recently described (p. 58) the same genus under the name of 
Nanina.” 
The generic characters observed by Mr. Benson are as follows :—- 
Nanina, Gray. 
First original detailed description of shell and animal of Macro- 
chlamys :—“Testa heliciformis, umbilicata ; peritremate acuto, non 
reflexo. 
“Animal cito repens. Corpus reticulosum, elongatum. Palliwm 
amplum, foramine communi magno perforatum, peritrema amplexans ; 
processubus duobus transverse rugosis (quasi articulatis) omni latere 
mobilibus instructum, unico prope teste aperture angulum swperio- 
rem exoriente, altero apud peripheriam teste. Os anticwm inter ten- 
tacula inferiora hians ; labia radiato-plicata. Tentacula superiora 
elongata, punctum percipiens tumore oblongo situm gerentia. Penis 
pregrandis ; antrum cervicis elongatum latere dextro et prope ten- 
tacula situm. Solea complanata pedis latera equans. Cauda ten- 
taculata ; tentaculum subretractile glandula ad basin posita humo- 
rem viscidum (animale attrectato) ewsudante.” 
Mr. Benson describes particularly the habits of the species ob- 
served by him, which he first discovered living at Banda, in Bun- 
delkund, on the prone surface of a rock. The animal carries the 
shell horizontally or nearly so, is quick in its motions, and, like 
Helicolimax, it crawls the faster when disturbed, instead of retract- 
ing its tentacles like the Snails in general. In damp weather it is 
rarely retracted within its shell, the foot being so much swollen by 
the absorption of moisture that if it is suddenly thrown into boiling 
water the attempt to withdraw into the shell invariably causes a 
fracture of the aperture. In dry weather the foot is retracted, and 
the aperture is then covered by a whitish false operculum similar to 
that of the other Helicide. The two elongated processes of the 
mantle are continually in motion, and exude a liquid which lubri- 
cates the shell, supplying apparently that fine gloss which is obsery- 
able in all recent specimens. The fluid poured out from the orifice 
at the base of the caudal horn-hke appendage is of a greenish 
colour; it exudes when the animal is irritated, and at such times 
the caudal appendage is directed towards the exciting object in such 
a manner as to give to the animal a threatening aspect. 
