22 ZOOLOGY OF THE VOYAGE OF H.M.S. SAMARANG. 



Differing from 0. margarita and O.pundatum in form, being more cylindrical and very 

 narrow at the anterior extremity. 



8. Ovulum formostim. PI. VI. Fig. 6 a, b. Ovul. testa elongata, in medio sub-angulata, violacea, 

 ad extremitates fusca, lineis puncturatis cincta, ; canalibus brevibus, valide ernarginatis ; apertura angusta ; 

 labio externo in medio sub-angulato, denticulato, ad extremitates brevi, postice ad marginem externum 

 dentato ; labio interno lsevi, longitudinaliter sulcato, postice tumido, ad canalem angusto, rectiusculo, antice 

 ad canalem rectiusculo. 



Hab. East coast of Borneo. 



Of an elongated angular form, and of a remarkably bright violet colour, with yellow tips ; 

 the spiral striae are regular and beautifully punctured. The extremities rather produced, the 

 outer lip short at the ends and denticulated, the denticulations reaching the outer margin at 

 the posterior extremity. 



9. Ovulum concinnum. PI. VI. Fig. 8 a, b, c. Ovul. testa, parva, ventricosa, angulata, alba vel 

 rosea, minutissime striata ; dorso tumido, anguloso ; canalibus brevibus obtusis, integris ; apertura angusta ; 

 labio externo intus denticulato, in medio anguloso, labio interno postice tumorem angulosum crenulatum 

 ferente, interne longitudinaliter sulcato, antice angustato, ad canalem posticum recedente, ad canalem anticum 

 prominente, angustato sub-uniplicato. 



Hab. Isle of Capul, Philippines. 



A miniature resemblance of 0. angulosum ; more angular, minutely striated with a 

 groove along the inner lip, with an elevated, angular tumidity on the body whorl near the 

 angle. It is white, or pale rose. 



10. Ovulum sub-keflexum. PL VI. Fig. 10 a t b~ Ovul. testa oblonga, albida, laevigata, sub-rostrata, ; 

 dorso in medio sub-angulato ; extremitatibus sub-recurvis ; apertura angustata ; canalibus sub-emarginatis ; 

 labio externo lsevi, rotundato, supra medium sub-angulato, antice sub-angulatim arcuato ; labio interno 

 postice tumido, ad canalem producto, recedente, intus longitudinaliter depresso, antice ad canalem producto. 



Hab. Coast of Bilaton. 



An oblong, smooth, white shell, with the extremities rather produced, blunt and turned 

 upwards. The outer lip is smooth, round, and flexuous. 



11. Ovulum sracile. P. VI. Fig. 11 a, b, c. Ovul. testa elongata, fusiformi, minutissime striata, 

 ad extremitates attenuata, recurva ; labio externo lsevi, sub-angulatim arcuato ; labio interno lsevi, in medio 

 sub-ventricoso, ad extremitates attenuato, acuminato ; colore pallide fulvo, dorso prope marginem longi- 

 tudinaliter rubro-fasciato. 



Hab. East coast of Borneo. 



Fusiform, striated, more gradually ventricose in the centre, and less attenuated at the 

 canals than either 0. longirostrum or 0. recurvum. At the back, near the margin, is an 

 irregular longitudinal band of dull red, interrupted in the centre. 



