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 elegantissimfe 

 striata. Anfractus S — 4; sutura distinct^. Apertura 

 suborbiculato-ovata ; peristomio simplici. Umbilicus 

 valdh patens. 



Long. 0.05.— Diam. 0.125. 



H. radiatula. Mr. Alder, Catal. 



The striae 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 paul6 major ; spird productiore. 

 Under stones and logs of wood on Mount Edgecumbe near 

 Plymouth. 



H. rotunda ta, p. 342. 



Var. a 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. Diet. 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 Miihl- 

 voL. XVI. 3 u field. 



