Zoological Society. 133 
\ supra et infra maculatd, liris castaneo conspicue funiculatis, colu- 
. melld labroque rufo-aurantio tinctis ; canali subelongato. 
Hab. ? 
Allied to the Murex chrysostoma in respect to its rufous orange 
mouth, but of a different colour and sculpture throughout. 
August 26.—William Horton Lloyd, Esq., in the Chair. 
«« Remarks on the genus Achatinella, Swainson, and descriptions 
of six new species from Mr. Curning’s collection.” By Dr. L. Pfeiffer. 
_. Upon examining the long series of forms which occur in the vast 
family of the Helicee, I have ascertained that there are several groups 
which Nature herself seems to have characterized as genera, though 
it would be very difficult to draw out such a generic definition as 
would exclude all other nearly allied species. One of these natural 
groups is the genus Achatinella, proposed by Swainson in Brandt’s 
Journal, 1828, which appears to be peculiar to the Sandwich Islands, 
and has been united to the genus Bulimus by most recent authors, as 
by myself in my ‘Symbole.’ However, the greater the number of 
species we become acquainted with, the more convenient it appears 
to unite them together as a distinct genus. I may therefore be per- 
titted to give a short account of the species now known. 
1. AcuatineLLa LucuBRis (Turbo), Chemn. Described by La- 
marck under the name of Monodonta seminigra, and figured by 
Swainson in the Zool. Illustr. under the name of 4. pica, Of 
course the name of Chemnitz must be retained. 
2. ACHATINELLA PERVERSA, Swains. Synon. Helix decora, Fér., 
t. 155. f.5—7; Bulimus decorus, Pfr. Symb. 
3. AcHATINELLA acuta, Swains. Hel. -spirizona, Fér., t. 155. 
f, 14, 15. 
4. AcHATINELLA BULIMOIDES, Swains. Hel. lorata, Fér,, t. 155. 
_ £.9—11; Bul. loratus, Pfr. Symb. 
5. AcHATINELLA LIvipA, Swains. Hel. vulpina, Fér., t. 155. f. 1, 
2; Bul. vulpinus, Pfr, Symb. 
6. ACHATINELLA ROSEA, Swains. A very distinct species, to which 
none of Férussac’s figures may be referred. 
7. ACHATINELLA PULCHERRIMA, Swains. This species. might 
perhaps be considered as a dextrous variety of A. livida. 
8, ACHATINELLA TURRITELLA (Hel.), Fer., t. 155. f.13; Bul. tur- 
ritella, Pfr. Symb. 
9. AcHATINELLA TristIs (Hel,), Fér. Mus. ; Bul. tristis, Pfr. Symb. 
10. AcHaTINELLA veNTULUs (Hel.), Fér. Mus.; Bul. ventulus 
Pfr. Symb. 
11, Acnarinenta rapiata, Pfr. Ach. testd ovatd, soliduld, leviter 
.-\« striatd, nitidd, viridi et luteo radiatd, strigis intercurrentibus ni- 
 gricantibus; spird conicd, obtusiusculd ; suturd marginatd ; an- 
