MOLLUSCA. 
563 
the specific identity of both, but maintains the distinctness of the genus 
Limactts, supposing that the European variegatus (Er.) has been introduced 
from Australia [I ?]. Mah. Blatt. xvi. p. 148. 
Amalia (Moq.-Tand.) —Milax (Gray) . Its generic distinctness from Limax 
is denied by Lehmann, Mai. Blatt. xvi. pp. 63-65, and maintained by Heyne- 
mann, ibid. p. 147. 
Amalia marginata (Drap.) found on the Upper Lahn by W. Kobelt, 
Nachrichtsbl. mal. Gesellsch. i. p. 61. Found in Rhenish Prussia by Gold- 
fuss, and more recently by Dr. Lischke. Ibid. p. 82. 
Krynickia americanay sp. n., Tate, Am. Journ. Couch, v. p. 164, pi. 16. 
fig. 1, Nicaragua. 
Othelosoma sysmondsii, g. et sp. n.. Gray, Ann. & Mag. Nat. Hist. iii. p. 241, 
from the Gaboon; insufficiently described, resembling more the leech of 
Ceylon than a slug ; no exact generic characters are given. 
Vitrma pellucida (Miill.) ? from Unalaschka. Cooper, Am. Journ. Conch. 
V. p. 200. 
Vitrina limpida (Gould), New England, angdicoi (Beck), Greenland, and 
pfciffcri (Newcomb), California. Binney & Bland, Land- and Freshwater 
Moll. N. Amor. pp. 26-28. 
Vitrina mamillatay sp. n.. Martens, Mal. Bliitt. xvi. p. 208, Ailat, Abys- 
sinia. 
Jlelicarion aureofuscusy sp. n., Martens in v. d. Decken’s Reisen in Ost- 
Afrika, vol. iii. p. 65, pi. 1. fig. 1, Mombas, Eastern Africa. 
Microcystis perpolitay sp.n., Mousson, Journ. Conch, xvii. p. 326, pi. 14. 
fig. 1, Upolu, Samoa Islands. 
\_Nanina~\ Helix camhojicnsis (Reeve) is stated to have been found in the 
country of the Mois, 60 leagues north of Saigon. Daniel, ,Toum. Conch, xvii. 
p. 127. 
Nanina intumescem (Blanf.) from Mahabaleshwar, Pfeiffer, Novitat. iii. 
p. 494, pi. 106. figs. 11, 12. 
Nanina jacquemontiiy sp. n.. Martens, Mal. Blatt. xvi. p. 76, Himalaya, 
belongs to the group Orobia (Pfr.). 
Orobia {Helix) andamanensis, sp.n.. Try on. Am. Journ. Conch, v. p. 110, 
pi. 10. fig. 4, Andaman Islands. 
llhyssota {Helix) chambertiniiy sp. n., Tryon, 1. c. p. 109, pi. 10. fig. 2, An- 
daman Islands. 
Guppya is a new name for Stenopus (Guilding), which is preoccupied; 
only the lateral teeth are lilie those of Testacella. Helix gundlachi (Pfr.) 
and Conulus means (Guppy) belong to this genus. Tate, Am. Journ. Conch. 
V. p. 165. 
Troehonaninay gen. nov., proposed by M. Mousson for several species 
hitherto comprised under Trocliomorphay but sculptured on the upper surface 
of the shell, and having the columella thickened, as conus (Phil.), conicoides 
(Metcalfe), mozambicensis (Pfr.), lycJmia (Bens.), and schmeltziana (Mouss.). 
Journ. Conch, xvii. p. 330. [In T. 7nozambicensis the presence of a muci- 
parous pore has been pointed out by the Recorder, Preuss. Expedit. Ostas. 
ii. p. 255 ; it is absent in the true Trochomorpha ternatana (G iii lion ),^;/anor- 
bis (Less.), and tricolor (Martens).] 
The following species appear to be referable to this new genus, Trocho- 
nanina : — Nanina pyramidea, sp. n.. Martens in v. d. Decken’s Reisen in Ost- 
