V U L U M . 



Plate VII. 



Species 30. (Fig. a, h, Mus. Cuming.) 



Ovi'LUM P.\TLiLUM. Ov. tesfd ovatn, ulrinque suhalatd, 

 ieniii, petlucido-albd, extreniifatihm caiiaViculato-ros- 

 trutis, lahro ienui, aperturd patuld, colitmelld niriiiqiie 

 conlorto-prodiictd, hand plicatd. 



The open Ovulum. Shell ovate, slightly winged at 

 each end, thin, transparent white, extremities canali- 

 culately beaked, lip thin, aperture wide open, colu- 

 mella slightly twistedly produced, not plaited. 



Bulla patula. Pennant, Brit. Zool. 4th edit. vol. iv. p. 117. 

 pi. 70. f. 8.5 a. 

 Folva patula, Fleming. 

 Ovulum patulian, Sowerby. 



Hab. Mediterranean. Southern and western shores of 

 England and Ireland. 



A very distinct form of the genus, in which the lip 

 seems scarcely to have arrived at maturity. 



Species 31. (Fig. a, b, Mus. Cuming.) 



OvuLCM OBTUSUM. Oo. tedd elongalo-ovatd^flavescentc- 

 albd, dorso modice gibboso, exlremitatibus calloso-atle- 

 nuatis, aperturd anyuntd, columella hand plicatd. 



The obtuse Ovulum. Shell elongately ovate, yellowish- 

 white, back moderately gibbous, extremities callously 

 attenuated, aperture narrow, columella not plaited. 



SowEUBY, Spes. Conch, pt. 1. p. 1. f 34. 

 Radius obtusHs, xVdaras. 



Jfnb. China Sea; Belcher. Mino-Sima, Japan (at the 

 depth of sixty-three fathoms) ; Adams. 



Rather more narrowly compressed than its nearest allied 

 species, 0. emarginatum, with the characters more obscurely 

 developed. 



Species 32. (Fig. a, b, Mus. Cuming.) 



Ovulum gibbosum. Ov. iestd oblo>igd,crassiusculd, pal- 

 lide strainined, ad latera spadiceo tinctd, dorso con- 

 spicui gibboso-costato, extremitatibiis obtusis, labro 

 calloso-incrassato, columella hand plicatd. 



The gibbous Ovulum. Shell oblong, rather thick, pale 

 straw-colour, stained at the sides with light fawn, 



back conspicuously gibbously ribbed, extremities ob- 

 tuse, lip callously thickened, columella not plaited. 



Bulla gibbosa, Linnseus, Syst. Nat. p. 1183. 

 Ovula gibbosa, Lamarck. 



Ilah. Brazil; Lamarck. Panama; Cuming. 



This well-known species is of a solid porcelain sub- 

 stance. 



Species 33. (Fig. a, b, Mus. Cuming.) 



Ovulum intermedium. Ov. testa clomjalo-ocatd, soli- 

 diusculd, rufescente-fiavd, dorso medio gibboso-liruto, 

 extremitatibus canaliculato-altenuntis, lubro incrassato, 

 columelld superne contorto-callosd, haud pAicatd. 



The intermediate Ovulum. Shell elongately ovate, 

 rather solid, reddish-yellow, back moderately gib- 

 bously ridged, extremities canalicnlately attenuated, 

 lip thickened, columella twistedly callous at the upper 

 part, not plaited. 



Sowerby, Spes. Conch, pt. i. p. 9. f. 32, 33. 



Hub. Brazil. 



This species, as its name indicates, is intermediate in 

 character between 0. obtusum and O. birostre. 



Species 34. (Fig. a, b, Mus. Cuming.) 



Ovulum em.^kginaTUM. Oo. testa obloiigd, crassiuscidd, 

 Jlavescente-albu , interdum aurunlio et pupurascente 

 tinctd, dorso medio conspicue gibboso-costato, extremi- 

 tatibus abbreriuto-emarginatis, callosi.s, labro calloso 

 incrassato, columdld superne conlorlo-cullosd, haud 

 plicatd. 



The emarginated Ovulum. Shell oblong, rather thick, 

 yellowish-white, sometimes tinged with orange and 

 pui-ple, back conspicuously gibbously ribbed, extre- 

 mities shortly emarginated, callous, lip callously 

 thickened, columella twistedly callous at the upper 

 part, not plaited. 



Sowerby, Spes. Couch, pt. i. p. 7. f. 54, 55. 



Hab. St. Elena, West Columbia ; Cuming. 



The peculiarity of this species, as distinguished from 0. 

 gibbosum, consists chiefly in the thickened callosities of the 

 shell being everywhere so prominently developed. 



March, 1865. 



