T R C H I T A 



Plate III. 



Species 11. (Mus. Brit.) 



TnocuiT.^ CALYPTBiEFOKMis. Trocfi. testa orhiculato- 

 convexd, subspiraii, apice mamillatd; alba vel lutes- 

 cente, epidermide tomentosd induid, intus alba, purpu- 

 Tascente-carneo interdum tinctd, appendice septiformi, 

 latiusculd. 



The Calypth.^a-shaped Teochita. Shell orbicularly 

 convex, rather spiral, mamillary at the apex ; white 

 or yellowish, covered with a hairy epidermis, interior 

 white, sometimes tinged with purple-flesh, appendage 

 septum -shaped, rather broad. 



Trochus CalyplrceformU, Lamarck, Anim. 

 vii. p. 627. 



Calyptrana Lamarckii, Deshayes. 

 Crepidida tomentosa, Quoy and Gaimard. 



Hab. Tasmania. 



Rather more spirally convoluted than in its nearest allied 



species, T. macidala, and of smaller size. 



vert. vol. 



Species 12. (Fig. a, b, Mus. Cuming.) 



Tbochita mamillaris. Troch. testa conicd, pileiformi, 

 IcBvigatd, apice mamiUan; corneo-albd, livido-purpu- 

 rascente tinctd, intus ferruyineo-purpvred, appendice 

 mblaterali, ad marginem centralem reflexd. 



The MAMiLLAiiY Tkochita. Shell conical, cap-shaped, 

 smooth, mamillary at the apex; horny-white, stained 

 with livid-purple, interior rust-purple, appendage ra- 

 ther lateral, reflected at the central margin. 



Calyptrcea mamillaris, Broderip, Trans. Zool. Soc. vol. i. 

 p. 201. pi. 28. f. 5. 



Hab. Island of Muerte, Central America ; Cuming. 



This species is chiefly characterized by its livid-puqile 



horny substance, and simple cap-like conical form. 



Species 13. (Tig. a, b, Mus. Cuming.) 



Trochita conica. Trocli. testd conicd, subpileiformi, te- 



nuiculd, concentrice rude striatd, apice submucronatd ; 



corneo-albidd, rufo wndique nebulaid et irregnlariter 



maculatd, appendice interna diaphano-albd, laterali, 



The conical Trociuta. Shell conical, somewhat cap- 

 shaped, rather thin, concentrically rudely striated, ra- 

 ther pointed at the apex; flesh-white, clouded and 

 irregularly spotted throughout with red, internal ap- 

 pendage dia[ihanous-white, lateral, eflfused. 



Calyptrma conica, Broderip, Trans. Zool. Soc. vol. i. ji. 



202. pi. 28. f. 7. 

 Hah. Xipixapi and Salango, West Columbia (attached to 



stones, in deep water); Cuming. 

 This fine species may be recognized by its densely red- 

 spotted colouring, and smaller diaphanous-white internal 

 appendage. 



Species 1-i. (Fig. a, b, Mus. Cuming.) 

 Tkochita clypeolum. Troch. testa orbiculari-depressd, 

 apice snbi/iami/lari, concentrice rude .itriatd ; sordide 

 albd, epidermide deusd fibrosd indutd, intus ebumed, 

 appendice ampld, septiformi, parum reflexd. 

 The little-shielu Tkochita. Shell orbicularly de- 

 pressed, rather mamillary at the apex, concentrically 

 rudely striated ; dirty-white, covered with a thick 

 fibrous epidermis, interior ivory-white, appendage 

 large, septum-shaped, but little reflected. 

 Hab. Straits of Magalhaens. 



A fine species, of rather depressed growth, covered with 

 a dense fibrous epidermis, with the internal septum-shaped 

 appendage reaching to the outer margin in a regular, tro- 

 choid growth. 



Species 15. (Fig. a, b, Mus. Cuming.) 

 Trochita .maculata. Troch. testd orbiculari, convexd, 

 subspiraii, concentrice striatd; albd, epidermide densd 

 fibrosd indutd, intus concavd, albd, violaceo nnimacti- 

 latd, appendice ampld, septiformi, vix reflexd. 

 The blotched Trochita. Shell orbicular, convex, 

 somewhat spiral, concentrically striated ; white, co- 

 vered with a thick fibrous epidermis, interior concave, 

 white, stained with a single blotch of violet, appen- 

 dage large, septum-shaped, scarcely reflected. 

 QnoY and Gaimard, Voyage de I'Astrolabe, vol. iii. p. 



422. pi. 72. f. 6, 9. 

 Uab. New Zealand. 



The interior of this species is characterized by the pre- 

 sence of a large violet stain. 



Pig, 16. (Mus. Brit.) 

 The shell here figured appears to be a large subtropical 

 state of T. Sinensis. 



