TURRITELLA.— Plate VIII. 



The gradual doubling of the number of keels in this 

 species is cm-ious. The first ten whorls are encii-cled by 

 six keels, an intermediate keel then gradually appears in 

 each of the interstices, increasing in size until they obtain 

 the same degree of development as the original keels. 



Species 41. (Mus. Cuming.) 



TURRITELLA ROSEA. Turr. testa, pyramidali-conica, bad 

 plano-a7igulatd, anfradibus quindecim, planatis, spira- 

 liter quinque-liratis, liris inceguidistantibus, striis ele- 

 vatimculis in interditiis; albidd, basin versus fem- 

 gijieo-fitscd, liris siriisque saturatioribns, apertune 

 fauce livido-purpurascenfe tinctd. 



The rose Turritella. Shell pyramidally conical, flatly 

 angled at the base, whorls fifteen in number, flat- 

 tened, spirally six-ridged, ridges inequidistant, with 



rather elevated stria; in the interstices ; whitish, 

 rusty brown towards the base, lines and striie darker 

 brown, interior of the aperture tinged with livid 

 purple. 



QuoY and Gaimard, Zool. Voy. de I'Astrolabe, vol. iii. 

 p. 136. pi. 55. f. 24-26, 

 An eadem? Turritella Jineolata, Kiener. 



Hah. New Zealand. 



The truly conical form of this species is very charac- 

 teristic, and it is neatly encircled throughout with brown 

 lines, consisting of ridges and intermediate stria; at 

 unequal distances. I can discover little of the rose- 

 colouring observed by M. Quoy ; and I incline to suspect 

 the rarity of this has led M. Kiener to describe the yel- 

 lower and Lighter variety of the species under another 

 name, T. Uneolata. 



