108 CONCHOLOGY. 



ture ; colour various, inner margin white or reddish brown ; 

 volutions five, with several dark brown bands. 



H. Carthusiana. The Carthusian Snail. 

 Species sub-depressed, sub-umbilicated, with a sharp 

 edge, thickened within by a roll. 



H. arhustorum. The orchard Snail. 



Sub-globular, sub-pellucid, sub-umbilicated, five volu- 

 tions, finely striated longitudinally ; mottled with greenish 

 yellow, streaked with deep chestnut, a broad brown band 

 commonly at the edge of the outer lip, and running round 

 through the volutions to the apex. 



2. Carocolla. Eighteen species. 

 All terrestrial shells in this genus, taken from the Linnaean 

 Helix on account of the peculiarity of the shell, which is 

 orbicular, more or less flat on the upper part ; the circum- 

 ference of the shells constantly carinated or sub-carinated ; 

 aperture ovate, transverse, contiguous to the axis of the 

 shells ; outer lip sub-angular, sometimes toothed within. 



Carocolla acutissima. Carocolla Madagascariensis. 



C. albilabris. C. marginata. 



C. angistoma. C. lychnuchus. 



C. labyrinthus. C. planata. 



C. lucerna. C. planaria. 



C. inflata. C. hispidula. 



C. Gualteriana. C. lapicida. 



C. bicolor. C. albella. 



C. Mauritiana. C. eleg; 



ans. 



C. lapicida. The stone Carocolla. PI. 19, fig. 1. 

 Species discoid, very umbilicated ; edges thick, but not 

 toothed ; beautiful bands. 



C. elegans. The elegant Carocolla. 

 Species with a conical spire a little elevated, the base 

 flat, the aperture square, with sharp edges. 



