MONOGRAPH OF BRITISH LAND AND FRESHWATER MOLLUSGA. 57 
Hyalinia alliaria (Miller). 
1822 Helix alliaria Miller, Ann. Phil., N.s., iii., p. 379. 
1825 — wnitens Sheppard, Linn. Trans., xiv., p. 160. 
1828 — fwtida Stark, Elem. Nat. Hist., ii., p. 59. 
18380 — adlliacea Jettreys, Linn. Trans., xiii., p. 34 
1851 — remota Benson, Ann. Nat. Hist., vii., p. 263. 
1837 Helicella alliaria Beck, Ind. Moll., p. 6. 
1840 Zonites alliarius Gray’s 'Turton’s Manual, p. 168. 
1877 Hyalinia alliaria W esterlund, Faun. Eur. Moll. Extram., p. 20. 
1886 Hyalina nitideformis De Castro, f. Bourguignat. 
1886 Huhyalina alliaria Esmark, Journ. of Conch., Voss) L2G: 
1891 Vitrea (Polita) alliaria Smith, Journ. of Conch., vi., p. 339. 
ISTORY.— Hyalinia alliaria 
(allium, garlic) was _ first 
differentiated by Mr. J. 8. Miller, 
of Bristol, who applied to it the 
very appropriate naine it bears. 
The species is here associated as 
a token of respect to the well-known 
Portuguese conchologist, Senhor 
José da Silva e Castro, who inde- 
pendently recognized the claims of 
this mollusk to specific rank, and 
described it as new under the name 
of nitidwformis, the incorrect appre- 
ciation abroad of the true alliaria 
explaining the renaming of a species 
already recognized in the nomen- 
clature. 
It has also been regarded by 
Mirch as identical with A. nitida 
©. Fabr:, and: with his own 7. 
steenstrupt described as inhabiting 
ose de Shine e Castro Greenland and Iceland. 
Though a fairly distinct shell in 
external aspect, and possessing certain peculiarities 1 in the animal inhabitant 
it was unfortunately confused for many years with /H/. helvetica, and this 
regrettable confusion at home led to great misconception abroad, owing to 
our British scientists distributing shells among their foreign correspondents 
as H. alliariv which in very many cases were really H. helvetica. 
Moquin-Tandon’s description and comments show that though he prob- 
ably had the species before him, he did not separate it from /elvetica and 
other forms, as he describes the species as attaining a maximum diameter 
of fifteen mill., and an altitude of six mill., sizes quite incompatible with 
the true HZ. alliaria. 
Dr. Jeffreys also confused helvetica with alliariu, and there is little 
doubt that Is figures of al/iuria were drawn from examples of helvetica. 
The specific status of 7. alliaria has been the subject of much diversity 
of opinion, especially with continental naturalists, but that it is the young 
of Hf. cellaria, as held by Dr. Beettger, or of 7. nitida of Draparnaud, as 
thought by Michaud, or of the species here termed /. helvetica, as believed 
by others, i is quite inadmissible. 
