TROCHUS. 491 



T. zizyphinus. Linnaeus. 



Conical, imperforated, either devoid of colour, or painted with 

 longitudinal flames, and spotted upon the more or less prom- 

 inent marginal helt ; the spiral costella) (when present), and 

 their interstices, alike simple in the adult, except at the apex, 

 which is not peculiarly stained with rose-colour. 



Plate LXVII. figs. 1 to 6. 



Lister, Anim. Angl. pi. 3, f. 14 ; Hist. Conch, pi. 61G, f. 1. 

 Trochus zizipkinus, Linn. Syst. Nat. ed. 12, p. 1231. — Penn. Brit. Zool. ed. 4, 

 vol. iv. p. 126, pi. 80, f. 103. — Pultenev, Hutchins, 

 Hist. Dorset, p. 44. — Donov. Brit. Shells, vol. ii. pi. 52. 

 — Mont. Test. Brit. p. 274. — Maton and Rack. Trans. 

 Linn. Soc. vol. viii. p. 155. — Rack. Dorset Catalog, p. 48, 

 pi. 16, f. 3, 4. — Fleming, Brit. Anim. p. 323. — Turt. 

 Conch. Diction, p. 189. — Forbes, Malacol. Monens. p. 22 

 (animal). — Johnst. Berwick Club, vol. i. p. 263 (with 

 animal). — Brit. Marine Conch, p. 163. — Dillw. Recent 

 Shells, vol. ii. p. 799 (not var.) — Wood, Index Testae, pi. 

 29, f. 94. 



„ conulus, Pennant, Brit. Zool. ed. 4, vol. iv. pi. 80, f. 104 (probably). 



„ zyziphinus, Born, Testacea Mus. Caes. Vind. p. 337. — Blainv. Faune 

 Franchise, Moll. p. 258, pi. 10, f. 1. 



„ ziziphinns, Da Costa, Brit. Conch, p. 37, pi. 3, f. 2. — Brown, Illust. 

 Conch. G. B. p. 18, pi. 11, f. 10, 17, 18, 19, 21, 22,24, 

 29. — Lam. Anim. s. Vert. (ed. Desh.) vol. ix. p. 142. 



„ zezyplrinus, Chemn. Conch. Cab. vol. v. p. 66, pi. 166, f. 1594. 



„ discrepans, Brown, Mem. Werner. Soc. vol. ii. pt. ii. p. 519, pi. 24, 

 f. 4 ; 111. Conch. G. B. p. 19, pi. 1 1, f. 20, 23. 



„ conuloides, Lam. Anim. s. Vert. (ed. Desh.) vol. ix. p. 142. — Mac bil. 

 Moll. Aberd. p. 132.— Blainv. Faune Franc,. Moll. p. 259, 

 pi. 10, f. 4.— Desh. Ency. Meth. Vers, vol. iii. p. 1<I7<;. 



„ Lyonsii, Leach MSS. (cited by Fleming). 



„ albidus, Wood, Index Test. Suppl. pi. 5, Troch. f. 1 4. 



„ Sisypkinus, Macgil. Moll. Aberd. p. 131. 



„ SedgwuMi (fossil), Sow. — Nvst. Coq. fos. de Beige, p. 380, pi. 35, f. 20. 



From the derivation of the name of this species having 

 been made the subject of much discussion, has arisen the 

 great diversity of spelling discernible in our synonymy ; 

 Professor Macgillivray deduces it from the rolling stone of 

 the legendary Sisyphus, and Chemnitz from the plant 



