158 Mr. G. B. Sowerby on the 



tusely mucronated ; columella with a single fold at the upper end ; lower 

 part, commencing near the middle, depressed, with a slight groove ; 

 margin of the outer lip thickened, nearly straight, somewhat angular 

 near the lower part. 



The only specimens of this species I have seen were in Mr. G. Hum- 

 phrey's collection ; I am unacquainted with their locality. 



OvuLUM Spelta, 

 Lam., Anim. sans vert. VII. 370. 

 O. testd oblongd, medio subventricosd, utrinqus acuminatd; apertiird 

 superne lineari, suhths suheffusd ; labia externa subtiis rottmdato-an- 

 gulato ; columella superne oblique uniplicald ; long, -/g, lat. -j^g-, poll. 

 Bulla Spelta, nonnull. 



Hab. ad iittora Insularum Oceani Pacifici. G. Humphrey. Mus. 

 nost., &c. 



Desc. Shell oblong, slightly ventricose, pointed at both extremities, 

 rather more at the upper than at the lower ; aperture linear and narrow 

 at the upper, and rather effuse at the lower, extremity ; lower end of the 

 outer lip rather angular, angle rounded ; columella with an oblique plait 

 at the upper end. 



There is no reason to doubt the shell here given being the Ovula 

 Spelta of Lamarck, and I believe also the Bulla Spelta, Linn. 



It is related to O. birostre, and comes between that species and my 

 0. obtusum. Lamarck states it to be a Mediterranean species ; my spe- 

 cimens are from the South Seas and Friendly Islands, according to two 

 tickets in the hand-writing of Mr. G. Humphrey. 



Martini's (tom. I. f. 215.) and Gualtieri's (t. 15, f. 4.) figures are not 

 sufficiently good to be referred to as certainly belonging to this species. 



OvULUM INTERMEDIUM. 



0. testd ovato-oblongd, utrinqnc subacuminatd ; dorso supra medium 

 transversim subangulato ; labia columellari prope extremitatem supe- 

 riarem oblique uniplicato ; labii externi margine interna edentulo; 

 long. 1^*^, lat. ii, pall. 

 Hab. . Mus. Mawe, nost. 



Desc. Shell ovate-oblong, somewhat acuminated at both ends, rather 



