AMPULLARIA crassa, 

 Thick Apple Snail, 



Upper and lower figures. 



Generic Character. — See PI. 103. 



Specific Character. 



A. testd glohos6, Iccvi, (sub epidermide) alba, fasciis fiiscis ornatd ; 

 spircc levatce apice ohtuso ; apertune ?iiargine alba, crasso ; 

 umbilico caret. 



Shell globose, smooth, beneath the epidermis white with brown 

 bands ; spire elevated, tip obtuse; margin of the aperture thick, 

 white; umbilicus none. 



Martini 9. t. 128. jQ 1135. 



A. DISTINCT species, well characterised by the absence of 

 the umbilicus, the situation of which is indicated only by a 

 slight depression : the margin of the aperture all round is 

 thickened, and white ; but, from no groove being discernible, 

 I suspect the operculum may be horny. The only specimen I 

 have, is divested of the epidermis ; it is obviously an old 

 shell; and appears to agree with the figure of Martini, 

 also taken from an uncoated specimen. 



AMPULLARIA oblonga, 

 Oblong Apple Snail, — {Middle Jigures.) 



A. testd oblongd, Ixvi, tenui, fused ; spird letatd, crassd, obtusd ; 

 apertiira: elongatce basi contract d ; umbilico vix obsokto. 



Shell oblong, smooth, thin, brown; spire elevated, thick, obtuse; 

 aperture lengthened, base contracted ; umbilicus nearly obsolete. 



A RARE and undescribed shell, presenting a singular devia- 

 tion from the general globose form of the Jmpnllaria. The 

 inner lip is wanting on the upper part of the aperture, and on 

 the lower is thin, white, and reflected over the umbilicus, 

 which is nearly obsolete. 



Both these shells were in the late Mrs. Bligh's collection, 

 without any habitat being affixed to them. 



PI. 136. 



