PULMONATA. 61 



These five species may not belong to this genus-; but the 

 partial exposure of the shell is not mentioned, and therefore 1 

 suspect it is closed, more especially as they are compared with 

 ' Drusia Valenciennii. 



See also " Parmacella Olivieri," Eichwald, Fauna Caspio-Cau- 

 casica, t. . f . , copied Mrs. Gray's Fig. Moll. t. 2S2. f. 1 : 

 from the Caucasus. 



4. GIRASIA. 



Body united to the back of the foot, only separated by the 

 couvex'hinder edge. Shell partly exposed, ovate, expanded, with a 

 solid apex. Back of the neck under the collar with three grooves, 

 the central groove between the tentacles double-edged, the lateral 

 one single, bent down on each side to the sides of the head at 

 the back of the lower tentacles ; the head is only j)artly retractde, 

 so that the base of the upper tentacles, which are completely re- 

 tracted, are exposed on the top of the head hke two perforations. 

 The aperture of the generative organs is rather behind tiie base 

 of the right tentacle. The hinder part of the body attached to 

 the back of the foot nearly to its hinder end, which is separated 

 from the deep concavity on the back of the foot by a deep lunate 

 cross groove. In all these particulars, the animal exactly agrees 

 with the Portuguese species of Drusia. 



1. GiRASIA HOOKERI. B.M. 



Shell oblong, elongate, slender, arched concentrically, very 

 thin, horny, wrinkled ; thicker, but equally horny, in the ujjjjer 

 part of the centre ; the apex thick, white, solid, suboblong, elon- 

 gate ear-shaped, with a lateral submarginal spire of half a whorl. 



Hab. India, Khasya {Dr. Joseph Hooker). 



2. GiRASIA? RUTELLUM. 



Animal bright gamboge-yellow, with four tentacles ; posterior 

 portion of thebody behind the shell keeled ; shield strengthened 

 mternally with a shovel-shaped shell of a ])early or nacreous 

 appearance, obtuse and globose at the apex, with a deei) sinus, 

 covered with a thin transparent e|)idermis, transversely wrinkled 

 bv the lines of growth ; colour white. Length i, breadth about 

 ^ of an inch. 

 Parmacellus rutellum, Ilutton, Journ. Asiat. Soc. Bengal, 1849, 



p. 64!) ; Arch. Naturg. 1852, p. 289. 

 Hab. Afghanistan ; Candahar. In April crepuscular. 



