— aie 
Testaceous Pneumonobranchous Mollusca of Great Britain." 511 
H. nitida, p. 339. 
Devonshire; Somersetshire; and the neighbourhood of Lon- 
don. 
The H. excavata of Messrs. Bean and Alder appears to be 
the variety a of my Synopsis. 
H. nitidula, var. a. p. 340. 
H. pura. Mr. Alder, Catal. 
21 bis. radiatula. 
Animal nigrescens. Tentacula breviuscula. 
Testa depressior, nitida, cornea, subtiliter et elegantissime 
striata. Anfractus 3—4; suturá distinctà. Apertura 
suborbiculato-ovata ; peristomio simplici. Umbilicus 
valdé patens. 
Long. 0.05.— Diam. 0,125. 
H. radiatula. Mr. Alder, Catal. ^ 
The stric are fainter on the under side and do not quite reach 
to the umbilicus.—Among decaying leaves and moss in woods 
of the North of Devon, Kent, and Wiltshire. 
For the discovery and publication of this elegant little species 
we are indebted to Mr. J. Alder. 
H. alliacea, p. 341. 
Var. a pauló major; spira productiore. 
Under stones and logs of wood on Mount Edgecumbe near 
Plymouth. 
H. rotundata, p. 342. 
Var. « sparingly among the rejectamenta of the Thames 
at Battersea. Dinton Hall, Bucks: Rev. Dr. Goodall. 
By the kind permission of Dr. Turton, I have examined his 
specimen of the Helix rotundata Conch. Dict. It is, as I sus- 
pected, only a distortion of the above variety, and answers to 
the var. 8 of Pfeiffer, who refers it to the H. perspectiva of Mühl- 
VOL. XVI. 3v field. 
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