355 



determined, by the convexity of the upper fide; and of 

 courfe, the aperture being placed fomewhat beneath. 



Having thus, we hope, pretty clearly defined what is 

 a reverfed fhell, or at leall explained what is confidered 

 as fuch by us, we fliall proceed to defcnbe the lew of 

 jhat family in the Turbo genus. 



66. 

 Turbo perverfus. Lin. Syfl. p. 1240. PerverSus. 



Cheiii. Conch, ix. t, 112. f. 959. a. Tab. 11. f. 12. 



Liji. Angl. t.2. f.ll ?—Favan. t.65. 1.4. 

 Berkenhout. p. 206. 3. 

 Hill Swamiiurd. p. 69. t. S. f. 1. 2. 

 Schroet Erdconck. p. 13S, t. 1. f. 5. 



T. with eight or nine reverfed, fub -pellucid, regular. 

 tapering fpires, of a yellowifh or greenifh horn-colour, 

 obfoletely ftriated ; volutions a little rounded, and di- 

 vided by a deep feparating line: aperture fub-orbicular ; 

 outer lip a little reflexed; pillar lip not detached, or 

 projefiing on the body whirl, the edges white and thin : 

 in old fhells a round, obfolete, tooth -like knob, is ob- 

 fervable at the edge of the upper angle, but is mofl; com- 

 monly without any. Length rarely exceeding a quarter 

 of an inch : breadth one fourth of its lensf-th. 



This fpecies is extremely local, and by no means fo 

 plentiful or common as T. bidens, with which it is rarely 

 found; We have taken it in Wil'fhire, and in Cornxoall 

 near Peivjn, in both places adhering to the trunks of 



Z z 2 trees : 



