N ASSA. 



Plate XXIIl. 



Species 151. (Mus. Cuming.) 



Nassa pellucida. Nass. k'sld semiorbiculari, plaiio-de- 

 pi-essd, pelluciio-alhd, riifu sparsivi punctata; spirit 

 retiisissimd ; aperturd ovatd, columella ban coutortd, 

 lahro umplici. 



The pellucid Nassa. Shell semiorbicular, flatly de- 

 pressed, transparent white, sparingly dotted with red; 

 spire very blunt; aperture ovate, columella twisted 

 at the base, lip simple. 



Cyclope pellncida, Eisso, Hist. nat. de I'Europe mcrid. p. 

 271. no. 719. 

 Cyclope Bonoviana, Eisso. 



Eab. Mediterranean. 



This may be only a small subtransparent variety of N. 

 Neritea. 



Species 152. (Mus. Cuming.) 



Nassa Mangelioides. Nass. testa ovatd, solirld, dorso 

 suljffiMosd, sordide ciiiered ; spird hrevi, acuta; au- 

 fractibus siiperne tiiberculatis, tubercuUs hie illic in 

 castas elongatis, interstitiis cancellatis ; aperturd mi- 

 nima, colnmelld subexcavatd, callo amplo incrassato late 

 repando labro juncto. 



The Man'gelia-like Nassa. Shell ovate, solid, rather 

 gibbous at the back, duU ash ; spire short, sharp ; 

 whorls tuberculated at the upper part, tubercles here 

 and there prolonged into ribs, interstices cauoellated; 

 aperture very small, columella rather excavated, with 

 a large thickened broadly spread callosity joined with 

 the lip. 



Hub. ? 



A very characteristic species, resembling certain species 

 of Maiif/elia, save in the wide-spread callosity which sur- 

 rounds the aperture. 



Species 153. (Pig. 153 and 156, Mus. Cuming.) 



Nassa Neritea. Nass. testa semiorbiculari, supra con- 

 vexd, fuloescente, purpureo-fusco minute reticulato-len- 

 tiginosd ; spird retiisissimd, infra concavo-depressd, cal- 

 losd, luted ; aperturd minima, columelld basi coutortd, 

 labro iucrassato. 



The Nekitos Nassa. Shell semiorbicular, convex above, 

 fulvous, minutely net-freckled with purple-brown ; 

 spii-e very blunt, concavely depressed beneath, cal- 



lous, yellow ; aperture very small ; columella twisted 



at the base, lip thickened. 

 Buccinum Neriteum, LumaiMS, Syst. Nat. (12th edit.) p. 



1201. 



Nassa Neritoides, Eno. Meth. 



Nana Nerita, Schumacher. 



Cijclope Neritea, Eisso. 

 Hab. Mediterranean. 



This well-known and very singular species is still with- 

 out any allied forms. 



Species 15'i. (Mus. Cuming.) 

 Nassa orbiculata. Nass. testd orbiculatd, crassissimd, 



dorso subyibbosd, lavi, olivaced ; spird brevi; aperturd 



m.inimd, columelld excavatd, callo luteo perainplo usque 



ad apicem crasse repando. 

 The orbicular Nassa. Shell orbicular, very thick, 



rather gibbous at the back, smooth, olive ; spire short ; 



aperture very small, columella excavated, with a very 



large yellow callosity, tliickly spread as far as the 



apex. 

 A. Adams, Pro. Zool. Soc. March 1851. 

 Rab. ? 



A truly remarkable species, one-half of the shell being 

 enveloped by the overflowing deposit of enamel forming 

 the callosity. 



Species 155. (Mus. Cuming.) 



Nassa cancellata. Nass. testd ovato-conicd,fuscescente, 

 tenui, subpellucidd, fusco liic illic variegatd; spird 

 acuta ; anfractibus longitudinaliter costatd, costisjlex- 

 iiosis, ad suturas subnodosis, interstitiis concinne cancel- 

 latis ; columelld excavatd, callo subincrassato repando, 

 labro crasse calloso. 



The cancellated Nassa. Shell ovately conical, light 

 brown, tliin, semitransparent, here and there varie- 

 gated with brown ; spire sharp ; whorls longitudinally 

 ribbed, ribs fiexuous, rather nodose at the sutures, 

 interstices neatly cancellated; columella excavated, with 

 a rather thick spread callosity, lip thickly callous. 



A. Adams, Pro. Zool. Soc. March 1851. 



Hab. Island of Masbate, Philippines (under stones) ; Cu- 

 ming. 



Allied in form to N. Mangelioides, but thinner and more 

 ventricose. 



December, 1853. 



