121 



father acuminated, and generally decollated spire, volutions 

 from four to six, ventricose, their upper margins rather undu- 

 lated, with from two to four sharp keels ; aperture circular ; 

 peritreme reflected, acuminated at the upper part ; umbilicus 

 large, carinated within, and its margin consisting of a promi- 

 nent keel. India. 



87- C. rugosum. (pi. xxvi. f. 123.) Lam. Anim. s. vert, 

 vi. 2. p. 145. 



T. globoso-conica, albida, spira brevi, depressiuscula, apice 

 acuminatiusculo ; anfractibus quinque, superne exquisite de- 

 cussatim striatis, infra lsevibus ; apertura circulari ; peritre- 

 mate revoluto, latere umbilicali tenui, expanso ; umbilico 

 magno, intus leevi. 



Shell globosely conoidal, whitish, with a short, rather 

 depressed spire, whose apex is rather acuminated ; volutions 

 five, with delicately decussated striae on the upper part, and 

 smooth on the lower ; aperture circular, and peritreme revo- 

 lute, its umbilical side thin and partly spread over the umbi- 

 licus, which is large and smooth within. Trinidad. 



88. C. obsoletum. (pi. xxvi. f. 124. 125.) Lam. Anim. 

 s. vert. vi. 2. p. 144. C. Madagascariense Gray in Griff. 

 Cuvier. 



T. globoso-conoidali, alba, fusco-fasciata, spira subacumi- 

 nata, anfractibus rotundatis, laevibus, ultimo ventricoso ; 

 apertura circulari ; peritremate albo, reflexo, subrevoluto, su- 

 perne subacuminato ; umbilico magno, spiraliter sulcato. 



Shell globosely conoidal, white with fuscous bands ; spire 

 rather acuminated ; volutions rounded, smooth, the last ven- 

 tricose ; aperture circular ; peritreme white, reflected, some- 

 what revolute, and acuminated at the upper part ; umbilicus 

 large, spirally grooved. 



89. C. volvulus, (pi. xxvi. f. 126) Lam. Anim. s.vert. 

 vi. p. 145. Encycl. Meth. t. 4G1. f. 5. a. b. Helix Volvulus, 

 Midler, Vermium, p. 82, no. 280. 



T. globoso-conica, apice obtusiusculo ; anfractibus quinque, 

 rotundatis, pallidis, fusco-variegatis, lsevibus ; suturadistincta, 

 margine inferiore levato ; apertura circulari, superne subcana- 

 lifera , peritremate albo, incrassato, reflexo ; umbilico medio- 

 cri, margine obtuse carinato, intus kevi ; operculo corneo, 

 tenui, spirali. 



Shell globosely conical, with a rather obtuse apex ; volu- 

 tions 5, rounded, pale coloured varied with dark brown, 

 smooth, suture distinct, its lower edge prominent ; aperture 



