MOLLUSCA. 
275 
Helix {Polifgyra) hehrii and anilis, sp. n., Gabb, Am. Journ. Conch, i. 
pp. 208 & 209; pi. 19. figs. 5~9 & 1-4, Guaymas, Mexico. 
Californian species ; — 
The Californian species of Helix are enumerated by Newcomb, Am. Journ. 
Conch, i. pp, 342-350. As new species, have been described by him 
Helix hillehrandiy tryoni, crchristriata, rufocincta, gabhiif facta, ixlntneyi, 
hreiceri, in Proc. Calif. Acad. Nat. Sc. iii. 1864, pp. 115-118. The first three 
are allied to H. dupetit-thouarsi and kelleti. II. tryoni is figured in Am. 
Journ. Conch, i. pi. 6. fig. 1. 
Helix sportdla (Gould). Its specific difierences from H. mncouvcrensis 
(Lea) are pointed out by Th. Bland, Ann. Lyc. Nat. Hist. N. York,viii.p. 165. 
Helix cronhhitei and romelli, sp. n., Newcomb, Proc. Calif. Acad. Nat. Sc. 
1865, Oregon and Arizona. 
Species from Western North America: — 
Vallonia mimita (Say). The shell, buccal plate, and teeth are figured by 
Morse, 1. c. pp. 21 & 22, and pi. 8, togetlier with the shell and buccal plate of the 
European Helix pulchella. The specific differences pointed out by the author 
are so very minute that the Recorder must express his doubt as to whether 
tliey would be confirmed by a comparison of a series of European specimens 
with one of American ones, a certain amount of variability in form being 
observed in all species whenever a large number of specimens has been 
examined. 
Xolotremn (Rafinesque) proposed by Tryon for a group of Helix, formerly 
included among Triodopsis, such as Helix paUiaia, ohstricta, appressa. Am. 
Journ. Conch, i. p. 81. [The name is Greek in appearance only, and sense- 
less in reality.] 
Helix {Taclicai) ncmoralh and liortensis. “A tracing which Mr. Binney 
sends me of the buccal plate of the European 7’. nemoralis is nearly identical 
with the buccal plate of H horte7isis from Maine, while that of the Euro- 
pean hortc7isis is quite different.” Morse, 1. c. p. 10. [This rather remarkable 
statement maj'^ be explained by the variability of the number of ribs in the 
buccal plate of the same species as found by other naturalists ; indeed the 
differences between the buccal plate of the European 7iemoralis and hoi'tensis 
are very small, if there be at all any constant difference between them.] 
Bidimus sicinlioei and sphcprocorius, sp. n., Pfeiffer, Proc. Zool. Soc. 1865, 
p. 830, pi. 46. figs. 2 (fe 3, Formosa. The first belonging to the group 
dromus, the last having the appearance of an incomplete shell. 
Calycia, a new division, called group, but the nUine used like a generic one, 
proposed by II. Adams, without indication of the essential characters. 
Type Btdimifs crystallmus (Reeve). The discover}^ of this interesting shell 
in Waigiou is due to Mr. Wallace. Proc. Zool. Soc. 1865, p. 412. 
Aehatina {Limicolaria) cailUaudi (Pfr.) and seimaariensis (Shuttl.), var. 
hartmanni, from the Sennaar, described by Martens, Mai. Blatt. xii. pp. 197- 
200 . — Aehxima calaharicn, sp. n., Pfinffer, Proc. Zool. Soc. 1865, p. 832, 
Old Calabar. 
Aehatina lorioli, sp, n.. Bonnet, Revue Zool, 1864, p.279, pi. 22. fig. 1, Brazil 
[The statements concerning the localities in this paper do not appear to be 
T 2 
