467 



MONOGRAPH OF THE GENUS 

 QVULUM. 



Char. Gen. Molluscum Tracheliopodum inarinuni. Testa con- 

 voluta, ovalis vel fusiformis, spira cselata ; apertura bicanalifera, 

 columella kevi. Operculum nullum. 



The spire is enclosed by the last whorl. The aperture has a 

 canal at each end. The columella is smooth. The mantle of the 

 animal covers a considerable portion of the shell. 



Ovulum Ovum (pi. xcix. f. 1, 2, 3), Bulla Ovum, Auctorum. 

 Ovula oviformis, Lam. Anim. s. vert. vii. p. 366. 



O. testa ovali, polita, alba ; canalibus brevibus, ad extremitates 

 emarginatis : apertura antice sub-aperta, sanguinea ; labio externo 

 intus crenulato, antice breviusculo, labio interno postice tumido, 

 antice subtortuoso, emarginato, ad canalem posticum angustato 

 sub-spirali, ad canalem anticum crasso rectiusculo. 



Oval, polished, white, with short ends ; the aperture widened 

 at the lower part, inside of a brownish red colour ; outer lip cre- 

 nulated within, shortened at the lower end; inner lip with a 

 rounded elevation on the upper part of the body, whorl, at the 

 posterior canal narrowed, and then sub-spiral ; at the anterior 

 canal thickened and rather straight. 



Found in the Indian Ocean, and in the Society and Philippine 

 Islands. 



2. Ovulum angulosum (pi. xcix. f. 4. 5), Lam. Anim. s. 

 vert. vii. p. 367. O. costellata, Lam. Ann. du Mus. xvi. p. 110. 

 Bulla imperialis, Billwyn. 



O. testa ventricosa, subangulata, lsevi, alba. ; dorso tumido, 

 anguloso ; obscure costellato ; canalibus brevibus, antica ad extre- 

 mitatem emarginata ; apertura angusta, intus violacea ; labio ex- 



