168 MANUAL OF THE MOLLUSCA. 



Animal elongated, tapering behind, entirely covered by a mantle ; tenta- 

 cles 4, the upper beai'ing eyes, the lower entire ; respiratory orifice on the 

 right side, near the front of the mantle. Lon. 1§ inches. 



Philotmjcus (Raf.) Fer. = Tebennophorus, Binney, 1842, Bost. Soc. 

 Jom-n. (Helix Carolinensis, Bosc) is also a slug with a long mantle. 

 Akion, Ferussac. Land-sole. 



Tyj^e, A. empiricorum, Fer. Spi. Limacella, Brard. 



Shell oval, concave; or represented by numerous irregular calcarious gra- 

 nules. 



Animal, slug-like ; respiratoiy orifice on the right side, towards the fi'ont 

 of the mantle ; reproductive orifice immediately below it ; tail rounded, 

 slightly truncated, terminated by a mucus-gland. Lingual teeth, as in Umax; 

 A. empii-icorum has 160 rows of 101 teeth each. The land-soles occasionally 

 animal substances, such as dead worms, or injured individuals of their own • 

 species. They lay 70-100 eggs, between May and September, are 26-40 • 

 days hatcliing, and attain their full growth in a year ; they begin to onposit •. 

 a month or two before that period. The eggs of A. hortensis are very phos- 

 phorescent for the first 15 days. {Bouchard.) 



Distr. 6 sp. Europe. Noi-way, Brit. Spain, S. Africa. 



Fossil. Newer Pliocene, Maidstone. {Morns.) 



Plectrophorus {corninus, Bosc) Fer. 3 sp. Teneriffe ; represented as 

 having a small conical shell on the tail; probably an erroneous observation. 

 Parmacella, Cu^der. 



Ti/2:)e, P. Olivieri, Cuv. Etpn. parma, a small shield. 



Spt. ? PelteUa (Americana), Van Beneden. 



Shell concealed, oblong, nearly flat, apex sub-spiral. 



Animal vitrina-like, with an ample foot, pointed behind, and furnished 

 with a mucus-pore ; mantle small, shield-like, in the middle of the back, 

 partly or entirely concealing the shell. 



P' calyculata, Sby. (CrypteUa, Webb,) PI. 12, fig. 27, is patellifonn, with 

 an exposed papillary spire. Listr. 7 sp. S. Europe; Canary Ids. N. 

 India. 



Fig. 93. Testacella haliotoides, Fer. * 

 Testacella, Cuvier. 

 Skell small, ear-shaped, situated on the posterior extremity of the body. 

 Aiiiinal, slug-like, elongated and tapering towards the head ; back with 



^ Back view of a half-grown individual ; side-view of shell on the tail, and 

 front view of the head. From specimens communicated by Arthur Mackie, Esq., of 

 Norwich. 



