RIC INULA. 



Plate II. 



Species 6. (Mus. Cuming.) 



RiCINULA MUTICA. Ricin. tesfd ovato-glohosa, crassisimii, 

 basi subattenuald, spird brevmimd, obtusd ; transvenim 

 indso-striatd, muticd, colmnelld subexcavatd, Itevigaid, 

 labro intus corispicue dentato ; fmco-nigricante, aper- 

 turd albd, aut paUide violitceo-albd. 



The smooth Ricinula. Shell ovately globose, very 

 thick, a little attenuated at the base, spire very short, 

 obtuse ; transversely deeply striated, smooth, colu- 

 mella slightly excavated, smooth, lip conspicuously 

 toothed within ; brownish black, apertiu-e white, or 

 pale violet-tinged wliite. 



Lamarck, Anim. sans vert. (Deshayes edit.) vol. x. p. 51. 



Testa junior, Ricinula pisolina, Lamarck. 



Sab. Mozambique (on coral reefs at low water) ; Hennah. 



A very distinctly charaterized species, and one that is 

 rarely met with ; the R. pisolina of Lamarck is referred to 

 the young state, on the testimony of M. Kiener. 



Species 7. (Mus. Cuming.) 



Ricinula poephyrostoma. Ricin. tesid oblongo-ovatd, 

 utrinque attenuatd, spird subprominente, acuta; longi- 

 tudinaliter concentrice costatd, (ransversim peculiariter 

 liratd, liris nmnerosis angmlk, confirtls, inter castas 

 profundi excavatis, aperturd utrinque deniicnlatd ; 

 livido-olivaced, liris cinereo-albicantibus, aperturd vivide 

 pnrpureo-laccd. 



The purple-mouth Ricinula. Shell oblong-ovate, at- 

 tenuated at both ends, spu-e rather prominent, sharp ; 

 longitudinally concentrically ribbed, transversely pecu- 

 liarly ridged, ridges numerous, narrow, close-set, 

 deeply excavated between the ribs, aperture denticu- 

 lated on both sides ; livid olive colour, ridges ashy- 

 white, aperture deep purple-lake. 



Reeve, Pro. Zool. Soc, 1846. 



Hab. Marquesas Islands (on the reefs at low water); 

 Rohr. 



An interesting new species distinguished by the erect 

 character of the transverse ridges, especially across the 

 interstices between the ribs, which, however, become some- 

 what obsolete with age ; the rich purple-lake colouring of 

 the aperture is also worthy of notice. 



Species 8. (Mus. Ciuning.) 

 Ricinula mendicaria. Ricin. testa ovatd. medio obesd. 



Htrinqve subattenuald, anfractiius basi subindistincte 

 Uratis, sujienie vel lavigatls, vet loiigitudinalitrr obso- 

 kte nodoso-costatis, colmnelld superne excavatd, labro 

 intus medio denticulato ; plerumque atro luteoque alter- 

 natini transcersim conspicue taniatd, interdum atrd, 

 tmnia luted imicd angustd cinctd, aperturd cinnamo- 

 meo-purpured. 



The patch-work Ricinula. Shell ovate, stout in the 

 middle, attenuated at each end, whorls rather indis- 

 tinctly ridged at the base, either smooth or longitu- 

 dinally obsoletely nodoscly ribbed above, columella 

 excavated at the upper pai't, lip denticulated within 

 in the middle ; generally alternately filleted with black 

 and yellow, sometimes black, encircled by a single 

 narrow yellow fillet, apertm-c cinnamon-purple. 

 Culumbella mendicaria, Lamarck. 



Hab. Philippine Islands ; Cmning. Zanzibar (for the dark 

 single-zoned variety) ; Thorne. 



The well-known Columbella mendicaria of Lamarck, which 

 has been akeady discarded fi-om that genus by Mr. Sow- 

 erby, in his recent admu-able monograph in the ' Thesau- 

 rus ConchyUorum ', belongs to that interesting group of 

 species, distinguished by M. Kiener under the characteristic 

 title of " Les Pourpres semi-ricinules ", and which I pro- 

 pose to include under the Lamarckian head of Ricinula. 



Species 9. (Fig. a and b Mus. Ciuning.) 



Ricinula clathrata. Ricin. testa rotnndato-ovatd, 

 spird breviusculd ; longitudinaliter crebrivaricosd, vari- 

 cibus costis spiniferis decussatis, spinh squam(pformibm, 

 prominentibus, inarginem versus longioribus, interstitiu 

 striatis, striis minutissime squamatis; columella superne 

 suhexcavatd, infra plicato-rugosd ; extus ferrugineo- 

 fuscd et albd, intus cmruleo-xMaced. 



The latticed Ricinula. Shell rotimdately ovate, spire 

 rather short ; longitudinally closely varicose, varices 

 crossed with spiniferous ribs, spines scale-like, pro- 

 minent, longer towards the margin, interstices striated, 

 striae veiy minutely scaled ; columella a little exca- 

 vated at the upper part, pUcately wrinkled beneath ; 

 exterior white and rusty brown, interior blueish 

 violet. 



Lamarck, Anim. sans vert. (Deshayes' edit.) vol. x. p. 49. 



Kab. Elizabeth Island (on the reefs at low water) ; Cuming 

 Testa junior Ricinula miticula, Lamarck. 



August, 1846. 



