™, 
26 HYALINIA LUCIDA. 
Var. syriaca Kobelt, Rossm. Icon., 187%, vi., p. 22, Lloso: 
SHELL more solid, milk-white beneath, last whorl com- 
pressed. Aperture pearly and shining, and the illustrative 
fivure indicating an internal rib. 
Diam., maj. 17 mill. ; min. 15 mill. Alt., 7 mill. 
This thicker form would seem to be a response to the arid 
conditions so prevalent in eastern lands. 
RUSSIA. 
Transcaucasia—Recorded from Mingrelia by Kobelt. ; 
ASIA MINOR. Vic. 50.—H. lucida 
ia —Recorde ,K v. syviaca Kobelt (after 
Syria —Reeorded by Kobelt. eG 
Var. albina Moquin-'andon, Hist. Moll. France, 1855, 11., p. 76. 
Zonites lucidus var. selectus Mousson, Coq. Schlafli, 1862, ii., p. 25. 
SHELL white. 
The var. sedecta of Mousson, which is described as a Jarger and whitish form, 
with slightly narrower umbilicus and less impressed sutures, would seem best 
placed here as a passage form to the typical colouring. 
Gloucester W.—St. Vincent Rocks, Clifton near Bristol ! Miss F. M. Hele. 
FRANCE. 
Haute Garonne—Pech-David near Toulouse (Moquin-Tandon, I.c.). 
Seine Moderately common in the gardens of the Grand Montrouge (Pascal, 
Cat. Moll. Haute Loire and Paris, 1873, p. 29). 
SPAIN, 
Andalusia—San Roque, Gibraltar ! R. D. Darbishire. 
RUSSIA. 
Transcaucasia—Sub-var. selecta has been recorded from Sakkum and Kutais on 
the west, and from Lenkoran on the shores of the Caspian Sea. 
Var. maculosa Cockerell, Proc. Zool. Soc., April 1887, p. 363. 
SHELL entirely beset with irregularly placed opaque white spots. 
This condition is probably atavic, and apparently due to deposits of calcareous 
matter; it is a transitional state between the usual translucent horny shells and 
the opaque calcareous ones of other genera, Pascal has observed a similar state in 
Hyalinia cellaria. 
Middlesex—Isleworth (Cockerell, 1.c.). 
Geographical Distribution.—Hyaliniw lucida is dispersed over the 
whole of Western Europe, extending also into Asia and North Africa, and 
is reported from several localities in North America, where it has doubtless 
been introduced. 
It is evidently only a subdominant species, as 1t is most plentiful around 
the Central European region, within which area it is not nearly so abundant. 
In the British Isles its distribution is somewhat discontinuous, and 
chiefly western and northern, another evidence of its decadence from an 
undoubted former dominancy. 
The real distribution, however, is probably very madequately known, as 
it was formerly and is still so frequently confused with the more abundant 
H. cellaria. (ts identity is also far too commonly masked by the specific 
names applied by various authors to slight geographical variations, a method 
of procedure hindering the formulation of sound and broad generalizations, 
and therefore very unfortunate in its results. 
