OVULUM INTERMEDIUM. Fig. 32 and 33. 



O testd ovato-oblongd, utrinqui subacuminatd ; dorso supra medium transversim subangulato ; labia columellari prop? extremv- 

 tatem supcriorem oblique uniplicato : labiiexterni margine interna edentulo : long. lfo, lat. \^, poll. 



Hab. . Mus. Mawe, nost. 



Desc. Shell ovate-oblong, somewhat acuminated at both ends, rather more so at the upper tban tbe lower ; back with a 

 transverse raised rounded angle rather above the middle ; aperture narrow at tbe upper end, broader at the lower ; columellar lip 

 with a single oblique plait close to the upper end : outer lip thickened, its inner edge smooth, without teeth : colour pale fulvous. 



I have named this intermedium from the circumstance of the principal characters of two other species, namely the O. gibbo um 

 and O. birostre being combined in it. J have seen only two specimens of this, one of which is in Mrs. Mawe's, the other in my 

 own Collection. 



OVULUM BIROSTRE. Fig. 41, 42, 44 and 45. 

 U. testa oblongd, ad utramque extremilatem rostratd, medio subventricosd, lavissimd, albkante ; aperturd superne angustd, 

 lineari, infra subeffusd ; labio externo subtus rotundalo-angulato ; columella supernd oblique uniplicatd ; long. lyV> 

 lat. T V, poll. 



Ovula birostris, Lam., Anim. sans vert. VII. 370. Bulla birostris, nonnull. 



Hab. ad littora Insularum Oceani Pacifici. Mus. nost., &c. 



Desc. Shell oblong, slightly ventricose in the middle, long-pointed at both extremities, very smooth, light coloured; 

 upper end of the aperture narrow, linear ; lower end rather effuse ; lower part of the outer lip somewhat angular, angle rounded : 

 a single oblique fold at the upper end of the columella : outer lip more thickened in the middle than at the extremities. 



Rather larger than Ovulum Spelta, from which it differs principally in having both extremities produced in a lengthened 

 point; how far this character may be regarded as constituting a sufficient specific distinction, it is difficult to decide, particularly 

 as there are specimens of intermediate character. I have thought it desirable to consider the short beaked specimens as a variety 

 of the present. Collections in general contain* so few specimens of this interesting genus, that I am obliged almost exclusively to 

 form all my conclusions from the study of my own. 



* Very few collections contain more than seven or eight species, and Lamarck describes only twelve, whereas I possess about twenty-three, 

 and have here described twenty-seven. 



OVULUM LONGIROSTRATUM. Fig. 46 to 48. 



O. testd oblongd, tenui, albkante, utrinque longirostratd; dorso sub-gibboso ; aperturd angustd, prope basin paululiim expansd ; 

 labii externi margine exteriore subincrassato ; long. 2 T \, lat. T \, poll. 



Hab. in Mari Adriatico. Mus. Goodall. 



Desc. Shell oblong, slender, whitish, with a slight flesh-coloured tint; the back is rather tumid, and both the terminal 

 canals are very much elongated and sharply acuminated, like the long beak of some small birds ; aperture narrow, slightlv widened 

 near the base ; outer lip with its outer margin rather thickened,; inner margin smooth. 



A most interesting, delicate and slender species, of which I have only seen one specimen, brought from the Adriatic by the 

 Rev. Dr. Goodall. 



OVULUM VOLVA. Fig. 56 and 57. 



O. testa ovali, utrinque longirostratd, dorso transverse striato ; labio externo incrassato, margine rotundato, intils eremtlato; 

 canalibus subflexuosis, elongatis; long. 4, lat. 1, poll. 



Ovula Volva, Lam., Anim. sans vert. VII., 370. Bulla Volva, Linn, et nonnull. 



Hab. in Oceano Sinensi, Javanico, &c. 



Desc. Body of the shell oval; back transversely striated; outer lip considerably thickened, not so perfectly involute as in 

 some other species, its edge rounded, slightly and irregularly crenated within ; both the canals much prolonged, and somewhat 

 flexuous, the upper longer than the lower. The outside of the body of this shell, when in good condition, is covered with transverse 

 impressed strise, these diverge as they approach the lip and become oblique towards the canals on which they gradually increase so 

 much in breadth as rather to form the spaces between oblique raised lines than to deserve the appellation of impressed stris. 



Not only singular but elegant in form ; when in fine condition it is of a delicate flesh-colour, darker within, and the outside 



