TURRITELLA.— Plate XI. 



Hooker's Turritella. Shell aciiminately tureetecl, 

 rather thiu, whorls fifteen in number, concavely 

 swollen in the middle, and conspicuously encircled 

 throughout with two sharp remote keels, last and 

 penultimate whorls finely clevately striated ; trans- 

 pareut-wliite. 



Hab. ? 



An extremely interesting species, collected during the 

 Antarctic Expedition by Capt. Sir James Clark Ross, which 

 I have tJie pleasui-e to name in honour of Dr. Joseph 

 Hooker, the eminent naturalist of that productive voyage, 

 and author of the ' Flora Antarctica.' 



Species 62. (Mus. Cuming.) 



TuRHiTKLLA SINUATA. Titrr. testa pyramidali-acuminatd, 

 (iiifractihus qtmtuordecim, plamdath, spiraliter tenut: 

 liratk et striatic, aperturd parvhcsculd, labro ampliter 

 ■nniiato ; ftdveseente, zonula albidd rufo-pimctatd infra 

 miturai. 



The sinhated Tukritella. Shell pyramidally acu- 

 minated, whorls fourteen in number, flattened, spirally 

 finely ridged and stiiated, aperture rather small, lip 

 largely sinuated ; light fulvous colour, having a red- 

 dotted white zone beneath the sutm-es. 



Ilab. ? 



Readily distinguished by its dotted painting, and Ijy the 

 broad sinus of the outer lip. 



Species G3. (JIus. Cuming.) 



TcRRiTELLA iiUBESCENs. Tmr. testd acum'mato-turritd, 

 avfractikis trededm., spiraliter confertim liratis et 

 striatic, primis paucin medio caritiatis, carina cito eva- 

 nidd ; rubescente. 



The light-red Turiuteli.a. Shell acuminately turretcd, 



whorls thirteen in number, spirally closely ridged and 



striated, the first few whorls keeled in the middle, 



keel quickly vanishing ; light-red. 

 Ilab. Bay of Montija, West Columbia (in coarse sand at 



the depth of seven fathoms); Cuming. 

 All the whorls are somewhat prominent in the middle, 

 occupied by the keel in the first few whorls. 



Species 64. (Mus. Cuming.) 

 Turritella cingulifera. Turr. testd gracili, turritd, 



anfractibus ad duodecim, superne contractis, deinde ro- 



tundatis, spiraliter elevato-striatis ; alba, infra suturas 



fuscescente. 

 The encircled Turritella. Shell slenderly turreted, 



whorls about twelve in number, contracted round the 



upper part, then rounded, spii-ally elevately striated ; 



white, light brown beneath the sutures. 

 SowERBY, TankeiTQle Cat. App. p. 14. 



Turritella fragilis, Kiener. 

 Ildh. Port Essington ; Jukes. 



The light brown colouring immediately beneath the 

 sutures is a prominent character of this species. 



Species 65. (Mus. Cuming.) 



Turritella incisa. Turr. testd subpyramidali-acnmimtd, 

 bnsi concavo-angidatd, anfractibus duodecim, plano-con- 

 vexis, spiraliter undiqiie creberrime inciso-striatis ; 

 cincreo-fuscd. 



The engraved Turritella. Shell somewhat pyrami- 

 dally acuminated, concavely angled at the base, whorls 

 twelve in number, flatly convex, spirally very closely 

 marked with engraved strise ; ash-brown. 



Ilub. Sidney (in deep water) ; Strange. 



Closely but u-regularly engraved throughout. 



