RICINULA.— Plate II. 



Variety /3. (Fig. 9. «.) 



Testa pana, spinis brevioribiis ; albMa, intus vivide pur- 



pureo-lacca. 

 Shell small, with the spines rather short ; white, interior 



rich purple-lake. 

 Hah. Island of Annaa (on the reefs at low water) ; Cuming. 

 The very beautiful and characteristic variety of this 

 species, represented at fig. 9 a, does not appear to have 

 been hitherto noticed. 



Species 10. (Mus. Cuming.) 



RiciNULA jioBUS. Ricin. testa ovatd, crassd, obesd, spird 

 breviusculd, transversim costatd, costis tuberculatis, lira 

 angustd, interstitiis utrinque minutissime squamatis, m- 

 terveniente ; carulescente-albd, tuberculis plerumque 

 anthracirds, aperturd vivide violaced. 



The mulbeery Ricinula. Shell ovate, thick, stout, 

 spire rather short, transversely ribbed, ribs tubercu- 

 lated, and a narrow ridge running between them with 

 the interstices very minutely scaled ; blueish white, 

 tubercles generally coal-black, aperture rich violet. 



Lamakck, Anim. sans vert. (Deshayes' edit.); vol. x. p. 51. 

 Purpura sph(eridia, Duclos. 



Hah. Lord Hood's Island (on the reefs at low water) ; 

 Cuming. 

 The Ricinula mortis is sometimes entirely white, though 



of much more common occurrence with the tubercles black. 



The R. aspera.wUch M. Kiener has confounded with this 



species, is distinct, as M. Deshayes affirms, but it requires 



an acute eye to detect the difference. 



Species 11. (Mus. Cuming.) 



Ricinula tubebctjlata. Ricin. testa oblongo-ovatd, spird 

 breviusculd; transversim seriatim tuberculatd, tuber- 

 culis suhquadratis, interstitiis subtiliter inciso-striatis ; 

 caruleo-albd, tuberculis anthracirds, interdum omnino 

 anthraclnd, aperturd violaceo-nigricante, denticulis 

 albis. 



The tubercled Ricinula. Shell oblong-ovate, spire 

 rather short ; encircled with rows of tubercles, tuber- 

 cles somewhat square, interstices finely deeply stri- 

 ated ; blueish-white, tubercles coal-black, sometimes 

 altogether coal-black, aperture violet-black, teeth 

 wliite. 



De Blainville, Nouv. Ann. du Mus. pi. 9. f. 3. 

 Eadem. Purpura marr/inalba, De Blainville. 

 Purpura granulata, Duclos. 



Hob. Lord Hood and Elizabeth Islands (on the reefs at 

 low water) ; Cuming. 

 The leading feature of distmction between this and the 



preceding species, is, that in the former the interstices be- 



tween the tubercles are simply engraved with striae, whilst 

 ill the latter, they are characterized by a distinct ridge, 

 the hollow on either side of which is crossed at frequent 

 intervals by minute scales; the tubercles are also uniformly 

 larger and more obtuse. 



Species 12, (Mus. Cuming.) 



Ricinula chrysostoma. Ricin. testd oblongd, spird nunc ^ 

 abbreviatd ; transversim undique inciso-striatd, strds 

 subdistantibus, longitudinaliter varicosd, varicibus squa- . 

 mis vet obtusis vel spiniferis et erect is or nails ; ferru- . 

 gineo-fuscd, striis sattiratioribus, zoids albi,s interrupts 

 interdum. cinctd, aperturd violaced inierdmn anrantid. 

 The golden-mouth Ricinula. Shell oblong, spire some- 

 times acuminated, sometimes abbreviated; transversely 

 deeply striated throughout, strife rather distant, lon- 

 gitudinally varicose, varices ornamented with scales 

 which are either obtuse or spiniferous ; rusty brown, 

 strife darker, sometimes encu'cled with interrupted 

 white zones, apertiu-e violet, sometimes orange. 

 Deshayes, Magasin de Zool., 1844. Moll. pi. 86. 

 Ifab. Islands of Bohol and Ticao, Philippines (on the 

 reefs at low water) ; Cuming. 

 An extremely variable species in form, sculpture, and 

 colom' ; the shell is sometimes elongated, sometimes short, 

 and the squamate varices above described in the typical 

 specimens become modified into mere noduled ridges. The 

 colour of the apertm-e varies from purple-violet to bright 

 golden-yellow, as in the specimen described and figured by 

 M. Deshayes. 



Species 13. (Mus. Cuming.) 



Ricinula aspera. Ricin. testd obtuse ovatd, spird brevi ; 

 transversim et longitudinaliter forticostatd, lira vnicd 

 obesd, vel duabus angvstis utrinqne minutissime squa- 

 matis, inter castas cingulatd ; albidd, costarum longi- 

 tudinalium latere sinistro fusco-nigricante, aperturd 

 vivide violaced. 



The rough Ricinula. Shell obtusely ovate, spire short ; 

 transversely and longitiidinally strongly ribbed, en- 

 circled between the ribs with a single stout ridge or 

 two naiTow ones ; whitish, left side of the longitudi- 

 nal ribs brownish-black, aperture bright pm-ple. 



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



Hab. Island of Masbate, Philippines (on the reefs at low 

 water); Cuming. 

 The sculpture of this shell is very similar to that of the 



R. morus, and M. Kieuer has published it as a variety 



of that species ; I am, however, inclined to think with M. 



Deshayes that it is distinct, there is a peculiarity in the 



form, painting, and general aspect, by wliich it miiy always 



be recognised. 



