Testaceous Pneumonobranchous Mollusca of Great Britain." 515 
P. umbilicata, p. 356. 
P. unidentata. Pfeiffer, i. 58. Taf. iii. fig. 19, 20.? 
P. Muscorum b. Id. iii. 61. 
Var. a. 
P. Muscorum. Pfeiffer? 
P. Muscorum a. Id. ? 
Jaminia (Leach?) Muscorum. Risso, Prod. de P Eur. Mér 
iv. 88. 
ALBA. 
A. marginata, p. 357. 
Pupa Muscorum d. Pfeiffer, iii. 61? 
Jaminia marginata. Risso, iv. 88. 
A. nitida, p. 358. 
Animal griseum. Tentacula superiora breviuscula, cla- 
vata; inferiora vix (etiam cum lente) discernenda. 
Vertigo edentula. Pfeiffer ? 
Pupa edentula. Mr. Alder, Catal. 
Jaminia edentula. Russo, iv. 88. 
North Devon, and Surry. The Alea revoluta of my Synopsis 
is an old and bleached specimen, with the aperture placed more 
extrinsically than usual. 
A. cylindrica, p. 359. 
Animal rufo-nigricans, nitidum. — Tentacula superiora 
paululüm arcuata. 
Pupa minutissima. Pf.? 
I have added a description of the animal from specimens taken 
in the South-west of France, where it is not uncommon in situa- 
tions similar to that of the British specimen before noticed. 
4 bis. sUBsTRIATA, Jeffreys. 
Animal nigricanti-griseum.  Tentacula superiora longius- 
cula, gracilia ; inferiora bulbiformia. Sustentaculum 
angustius. 
Testa 
