TROCHUS. 811 



Trochus dolabratus, Var. 5. Gmeliriy p. 3586. 



Helix terebella. Midler Vermium, ii. p. 123. 



Helix, No. 141. Schroeter Einl. ii. p. 215. 



Voluta dolabrata senior. Solander's MSS. 



Bulimus terebellum. Bruguiere Eric. Meth. p. 355. 



Bonanni Rec. 3. f. 579, and Kirch, f. 366. Lister Conch. 

 t. 844. f. 72. Petiver Gaz. t. 118. f. 15. Gualtery t.4. 

 f. M. 

 Inhabits Barbadoes. Lister. And is a land shell. Gualter. 

 Shell about fourteen lines long and six broad, and differs from 



T. dolabratus in being rather broader, in having the whirls 



flatter, and the inside of the outer lip smooth. 



DOLABRATUS. 120. Shell sub-conical, turreted, 

 glabrous, and umbilicated ; pillar twisted, 

 with three plaits, and the outer lip ribbed. 



Trochus dolabratus. Linnaus Si/st.Nat.p.l23l. Born 

 Mus. p. 339. Chemnitz, v. p. 73. t. l67. f. l603 and 

 1604. Schroeter Einl. i. p. 675. Gmelin, p. 3585. 

 Schreihers Conch, i. p. 266. 

 Helix dolabrata. Muller Vermium, ii. p. 121. 

 Voluta dolabrata. Solander's MSS. 

 Pyramidella dolabrata. Lamarck Si/st. des Anim. p. 92. 

 Argenville, t. 11. f. L. Knorr, vi. t. 29. f. 2. Favanne, 

 t. 65. f. L. 



Variety. With two or three transverse rows of brown spots. 

 Voluta notata. Solander's MSS. 

 Lister Conch, t. 844. f. 72 b. 



Inhabits Africa, and is a land shell. Linnaus. 



Shell three-quarters of an inch, or an inch long, and only one 

 third as broad, with the whirls slightly ventricose ; it is 

 white, and marked with from one to five transverse yellowish 

 brown lines ; the outer lip on its inside has about six ribs, 

 which are slightly toothed at a short distance from the mar- 

 gin, and by these ribs this species may be distinguished from 

 T. terebellus, which has the outer lip smooth. 



PERVERSUS. 121. Shell turreted, minute, imper- 

 forate, glabrous, with the whirls reversed, 

 and a double row of excavated dots. 



Trochus perversus. Linnaus Syst. Nat. p. 1231. Gmelin, 



p. 3586. 

 Cerithium perversus. Bruguiere Em. Meth. p. 496. ? 

 Inhabits the Mediterranean. Linncsus. 



