TURRITELLA. 



Species 22. (Mus. Wiilton.) 

 TuKRiTELLA EXOLETA. Turr. testii iifii„iiii(itn-tiirritd, criis- 

 siuscidci, ad basin obtuse aiiyiihilii. niij'nn-riljiia sednvni 

 ad septevidecini, superne ei inj'eniii nidi vudalis, medio 

 concavis, bueqnaliter excavatis, septis teimibus lamelU- 

 foriiiihus iuterdmn lougiluditialiter imbricafis, cosid 

 iiiferiori diipUci, aperlurrB margine medio sinuato ; 

 son/ide cereo-albd, rufo-atirantio obscure fiatmnatd, 

 costiii iiincidatis. 

 The decayed Turritella. Sliell aoumiuately tui'reted 

 rather thick, obtusely angled at the base, whorls 

 sixteen to seventeen in number, rudely ribbed above 

 and below, concave in the middle, unevenly exca- 

 vated, sometimes longitudinally imbricated with thin 

 lamelliform septa, lower rib duplex, margin of the 

 aperture sinuated in the middle ; duU waxen white, 

 obscurely flamed with orange-brown, ribs spotted 

 with the same. 

 Turbo ei-oh'tus, Linna;us, Gmebn's edit. ]). 3007. 



Turbo torculnris, Born. 

 Hab. Martinique, Guinea ; Kiener. 



The chief pecidiarity of this remarkal)le species consists 

 in the whorls being rudely excavated, and imbricated 

 across tlie hollow at frequent intervals with thin lamelli- 

 form septa. Specimens, however, are more commonly 

 seen without the septa; not merely worn, but in which 

 they apparently never existed. 



The shell in the Linneean collection, numbered to refer 

 to the ' Systema,' is a worn T. bicinyulata, and to that 

 species the present has been assigned by Dilhvyn. I 

 believe, however, that Linnaius's description refers to the 

 shell under consideration, and the figure of Bonaui, to 

 which he refers, goes far to support that opinion. 



Species 23. (Mus. Cuming.) 



Tdrritella cingulata. Turr. tedd ptjramidali-turritd, 

 criissd, subpotiderosd, atifractibus ad septemdecim, pla- 

 tinlatis, spiru/i/er foriiter tricostatis, costis planatis, 

 gniKuso-crciwHs ; fernigiiieo-idbidd, codin custaneo- 

 mgris. 



The girdled Turritella. Shell pyramidally turreted, 

 thick, rather ponderous, whorls about seventeen in 

 number, rather flattened, spirally strongly thrcc- 

 ribbed, ribs flattened and granosely crenatcil ; rusty 

 white, ribs chestnut-black. 



Sowerhv, Taakcrvillc Catalogue, App. p. xiii. 

 Tiirrildlii Irii-iiriiirda, King. 



IM. Valparaiso (in coarse gravel at the depth of six 

 fathoms) ; Cuming. 

 Mr. Cuming speaks of this very characteristic species as 

 being very abundant at Valparaiso, having fretpiently 

 brought up two bushels of living specimens at a time, 

 mingled with coarse gravel. 



Species 24. (Mus. Cuming.) 



Turritella flammulata. Turr. tedd acuminato-tur- 

 ritd, ai/fractibus octodecim, perpaucis primis bicostaiis, 

 cceteris rot/mdatis, w-p/pm-rodatis, codis mediaim lati- 

 tisculis, ceeieris idri,i^/"<- ,/rin/,i/!,d angudioribus ; ful- 

 vescente-albd, rosm Imrld, piiriiureo-fnsco punctata et 

 marmoratd, bad. rosed. 



The flamed Turritella. Shell acuminately turreted, 

 whorls eighteen in number, the few first two-ribbed, 

 the rest rounded, seven-ribbed, middle ribs rather 

 broad, the remainder on either side gradually narrower; 

 fulvous-white, stained with rose, dotted and marbled 

 with pm-ple-brown, base rose. 



Kiener, Icon. coq. viv. p. 7. pi- 5. f. 1. 

 Le Ligar, Adanson. 

 Turritella Ligar, Deshayes. 



Hab. Muscat, Ked Sea. 



The shell here represented from the above-mentioned 



locality is, no doubt, Le Ligar of Adanson, a name which 



cannot correctly be adopted in the Latin. It will be 



observed that both the sculpture and colouring of the 



species are peculiar. 



Species 25. (Mus. Belcher.) 



Turritella cerea. Turr. testa elongato-turritd, crassi- 

 usculd, nnfractibus octodecim ad viginti, superne subde- 

 clivibus, iti/er/ie tumidiuscidis, spiraliter sexearinatis, 

 carinis augustis, acutis, aperturam versus evanidis ; 

 fulvescente-albd, avfructuum parte snperiori fulvo-ru- 

 fescente tinctd. 



The waxen Turritella. Shell elongately turreted, 

 rather thick, whorls eighteen to twenty in number, 

 somewhat inclined round the upper part, rather 

 swollen round the lower, spu-ally six-keeled, keels 

 narrow, sharj), fading towards the aperture; fulvous 

 white, upper portion of the whorls tinged with 

 fulvous-red. 



May, IS-i'J. 



