The Natural Hiftory of JAMAICA. 
239 
This is commonly fmaller than the foregoing, tho’ fometimes as large 
is deeply furrow’d, all over white and black. It hath an Operculum 
fitted to the Mouth which hath long Teeth many towards the 
Spire or Circumvolutions, and few on the oppofite fide. 
I found it on the Shoars of Famsaica, where I faw one which wasall 
black. 
I have had it likewife from Siam, or at leaft one {carce different from it. 
CHAP VI. 
Of Sea-Snails and Trochi 
I. (0 N\Ochlea nivea, nitida, rarior Fab. Col. Lift. Hift. Conchyl. Tab. 571. 
No. 22. Cochlea nivea, exotica. Fab. Col. Obf. aqg.p.L. 11. Aa Co- 
chiea fubflava unicolor. Lifter tb. Tab. 566. 14. Cochlea valvata. Herm. Muaf. 
p- 50 No. 449. Cochlea Famaicenfis alba, craffa, umbilico pulvinato. Pet. 
Mem, cur. Ann. 1708. p,125. No. 2. Cochlesa Famaic. fubflava vel alba 
ee crafja, Ej. ib. No. 3- 
This Shell was not over three quarters of an Inch long, about 
halt an Inch broad, all milk white and fhining as turn’d Ivory. It 
had only three Volare which began from a long Mouth, near which 
it was umbilicated, and ended in a deprefs’d Vertex after three Turnings, 
It is fometimes of a light brown yellowifh colour, giving the Variety 
mentioned above from Mr. Petiver.. 
I found this Shell on the Coaft of the Ifland famaica. 
Il. Cochlea marinae ceruleo purpurafcens, compreff[a, levis, tribus volutis 
confians. Nat. Hift. Fam. p.32.Tab.1. Fig. 4. Cochlea e ceruleo purpu- 
vafcens. List. Hist. Conchyl. Tab. 572. No. 23. Carina Holuthariorum, 
Rumph. Thef. Tab. 20. Fig. 2. Cochlea famaic. purpurea, fragilis, Pet. mem. 
cur. Ann. 1708. p. 125, No.6. 
The largeft of thefe, which are all very light, thin and brittle, that 
I have met with, is of an Inch Diameter, more than half as deep from 
the Bafe, where is the Mouth, which is very wide, to the End of the 
Voluta on its Top. It hath not over three Circumvolutions or Turnings, 
and is at the Top of a light bluifh or purple Colour and {mooth, on the 
under, purple and ftriated. 
I found it fwimming on the Top of the Sea, with Bubbles out of 
its Mouth which was uppermoft, near Barbadoes, and have found tt at 
‘Jamaica, and have had ic fent me from the Caribe Iflands, and Fort St. 
George in the Eaft-Indzes, 
III. Cochlea marina Janthina, Fab. Col. parp. p. 12, 13. Lift. Hist. Conchyl. 
Tab. 572. No. 24. 
Thefe 
