Zoological Society. 133 



.j^.j\ supra et infra maculatd, liris castaneo conspicu^ funiculatis^colu- 

 ^^\v^ 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 Cliair. ^^ 



*' Remarks on the genus Achatlnella, Swainson, and description* 

 of six new species from Mr. Cuming's collection," By Dr. L. PfeifFer. 



Upon examining the long series of forms which occur in the vast 

 family of the Helicece, 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 ' Symbolse.' 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- 

 mitted to give a short account of the species now known. 



1. Achatinella litgubris {Turbo), Chemn. Described by La- 

 -uvj luarck under the name of Monodonta seminigra, and figured by 



Swainson in the Zool. lUustr. under the name oi A. pica. Of 

 ,b\r' course the name of Chemnitz must be retainedJ'^'f^^ ysraul/i 



2. Achatinella perversa. Swains. Synon. HeUx Secora, Fer., 

 1. 155. f. 5 — 7 ; Bulimus decorus, Pfr. Symb. 



3. Achatinella acuta. Swains. Hel. spirizona, Fer., t. 155. 

 f. 14, 15. 



4. Achatinella bulimoides. Swains. Hel. lorata, F6r., 1. 155. 

 - • f. 9—11 ; BuL loratus, Pfr. SymV" ''"''^T^ -Q^^r^yjuu y 



5. Achatinella LiviDA, Swains. Hel. vulpina, F^r.,U 155, f.l, 

 2 ; Bui. vulpinus, Pfr. Symb, 



^^,6. Achatinella rosea. Swains. A very distinct species, to which 

 .j^q\ none of Ferussac's figures may be referred. 



/o*<7^ Achatinella pulcherrima, Swains. This species might 

 '^^^ perhaps be considered as a dextrous variety of A. livida. 



S. Achatinella turritella (Hel.), Fer., t. l55^if.l^ri,J^ul. tur- 

 ritella, Pfr. Symb. '\ . ^^a\^ 



* ij9. Achatinella tristis {Hel.), Fer. Mus. ; Bui. tristis, Pfr. ^^mb. 



^^-10. Achatinella ventulus {Hel.), Fer. Mus.; Bui. ventulus, 

 Pfr. Symb. 



,^.^^^1. Achatinella radiata, Pfr. Ach. testd ovatd, soliduld, leviter 

 V. striatd, nitidd, viridi et luteo radiatd, strigis intercurrentibus ni- 

 \ gricantibus ; spird conicd, obtusiusculd ; suturd marginaid; an- 



