12 



PULMONATA. 



figure which has been named P. corninus, only represents an 

 Arion ater with some hardened mucus on its su1)caudal gland, 

 which has been mistaken for a shell ! Tliis species differs from 

 the others in wanting the posterior shield bearing the shell. 



1. Plectrophorus D'Orbignii. 



Shell conical, acute ; mouth oval, very concave internally ; left 

 lip thick, right lip sharp-edged. 



Testacelle de Teneriffe, UOrbigny, MSS. 



Plectrophorus Orbignii, Fe'russac, Tab. Syst. 26 ; Moll. ii. 87- 



t. 6. f. 7. 

 Hub. Teneriffe {D'Orbigny). 



2. Plectrophorus costatus. 



Cochlea testacea terrestris, Favanne, Conch. Zoomorph. t. 76- 



f. C 1, C 2. 

 Testar^ella costata, Bosc, Buffon, Deterv. Coq. iii. 240. 



Roissy, Buffon, Sonnini Moll. v. 254. 

 Plectrophorus costatus, Ferussac, Tab. Syst. 26 ; Hist. Moll. ii. 



86. t. 6. f. 6, cop. from Favanne. 



Hab. Maldives. 



Only known from a drawing and description sent by M. Solen- 

 drac de Pilmont, "an English (?) traveller," to Favanne. 



3. Plectrophorus? corninus. 



Side of foot pale black-banded. 



Limax, Favanne, Conch, i. 429 ; Zoom. t. 76. f. B 1, B 2. 

 Testacella cornina, Bosc, Buffon, Deterv. Coq. iii. 239. 



Roissy. Buffon Moll. v. 253. 

 Plectrophorus corninus, Ferussac, Tab. Syst. 26 ; Hist. Moll. ii. 



86. t. 6. f. 5, from Favanne. 

 Hab. ? 



A verj' doubtful species : see note to the genus. 



b. Body spiral: labial tentacles elongate, contractile. 



3. OLEACINA. 



Shell oblong, acuminate, more or less fusiform ; whorls six to 

 eight, last much the largest. Pillar arcuately truncated. iVIouth 

 narrow ellijjtical, oblong or oval. Peristome simple, straight ; 

 of outer lip sinuate. Foot elongate ; head produced ; mouth 

 proboscidiform . Labial tentacles triangular, slender, elongate, verv 

 dilatile, produced on the sides ; upper tentacles elongate, swollen 



