PULMONATA. H 



Var. 4. Testacellus Haliotidea, var., Aleron in Guide Voyage in 



Roussillon, 1847, p. 327. 

 Testacella companyonii, Dupuy, Moll. France, i. 47- 1. 1. f. 3. 



Hab. South of Europe, South of France and Spain : introduced 

 into England. 



2. Testacellus Maugei. B.M. 



Reddish brown, spotted ; edge of foot orange. Tentacles fili- 

 form. Shell ovate elongate, thin, finely striated ; spire elevated, 

 distinct. 



Testacellus haliotoideus, Lamk. Syst, i. 96. 



Bosc, N. Diet. H. N. xxii. 80. 



Buffon, Deterville, iii. 239. 



Roissy, Buffon, Sonnini, v. 253. 



Ledrti, Voy. Teneriffe, i. 187. 

 Testacellus Maugei, Ferussac, Tab. Syst. 27 ; H. Moll. ii. 94. 

 Hab. Teneriffe ; introduced into England in gai-dens. 



2. PLECTROPHORUS. 



Shell very small, subconic, subspiral, on hinder part of the 

 body ; mouth round, with a slight fold on the back edge. Animal 

 produced in front with a granulated disk (enlarged mantle?), 

 produced before and slightly behind the shell, and with a similar 

 broader granular shield (true mantle ?) in front of the back ; 

 with the aperture of respiration in the middle of the right side of 

 the front disk, as in the shield-like mantle of Limax and Arion. 

 Teeth ? 



Limaces acoquilles, Favanne, Conch. Zoom. t. 7^. 

 Testacelle, sp., Cuvier, Leg. d'Anat. Comp. i. t. 7- 



Lamk. Syst. A. s. V. 96. 

 Plectrophorus, Ferussac, Tab. Syst. 10. 25. 96", 1819; Hist. 

 Moll. ii. 84 ; not Bosc. 



Gray, Lond. Med. Repos. 1821 ; Proc.Z. S. 1847, 1 70. n. 439. 



Philippi, Handb. Conch. 241. 

 Plectophorus, Gray, Syn. B.M. 1842, 68, misprint. 



This genus is only known from a single species observed by 

 the elder D'Orbigny in Teneriffe, and figured by Ferussac from his 

 details, and from figures in the old work of Favanne, an author 

 whose figures often require correction. It is so unlike the usual 

 form of terrestrial Mollusca, especially in having the shell placed 

 at a distance from the aperture of resi)iratiou, that we cannot 

 but believe there has been some inaccuracy in the description 

 which wants verification. There is reason to believe that one 



