Testaceous Pneumonobranchous Mollusca of Great Britain." 521 
Puvsa. 
1 bis. P. alba. 
Phyza. Risso. 
Animal 
Testa spherico-ovata, ventricosa, fragilis, diaphana, stri- 
atula, alba. Anfractus 3—4, globosi; suturá exca- 
vata; spirà brevissima, acutiore. Apertura larga, 
ovata. 
Long. 0.275.—Diam. 0.175. 
Physa alba. Turton in Zool. Journ. No. vii. p. 363. t. xiii. 
fo 8. 
Dr. Turton says, this rare and eminently beautiful species was 
sent him by Mr. Blomer as from the river Towin, North Wales. 
Lady Elizabeth Finch did me the honour of presenting me with 
a specimen, which I believe was procured through the same 
channel. Mr. Sowerby has this species from Sicily; and I 
fear Dr. Turton has been deceived or mistaken in its British 
locality. 
P. hypnorum, p. 382. 
Var. a. minor, magis oblonga. 
In pools on Crymlyn Burrows near Swansea, rare. Colour 
a deep and bright bronze. 
PLANORBIS. 
P. Vortex, p. 382. 
The variety a of my Synopsis is abundant at Battersea; and 
the other below the Thames about Woolwich. 
P. corneus, p. 383. 
Neighbourhood of Dublin: App. to Welsh & Whitelaw’s Hist. 
of Dublin. 
P. lutescens, p. 385, lege disciformis. 
i 3x2 Not 
