L^DA.— Plate V. 



umhonali lata, ad terminum ohVtque Iruncato, 

 margine dorsali arcuato. depresso, ared latd, planu- 

 latd ; umbonihus rotundis. 



The nasal L^eda. Shell pyriform, ventricose, white, 

 rostrated, smooth ; anterior side inflated, rather 

 lengthened, dorsal margin arched, sloped, ventral 

 convex ; posterior side narrow, rostrated, acumi- 

 nated, umbonal rib wide, obliquely truncated at 

 the end, dorsal margin arched, depressed, area 

 wide, flattened, umboes rounded. 



SdWERBT. Con. Illustr. 



Hab. East Indies. 



Species 29. (Mus. Brit.j 



L.aEDA EBUENEA. Lced. testd stibatfenuatd, jiyriformi ; 

 epidermide jmllidd indutd, Kris conceniricis creber- 

 rimis sculptd ; latere antico suhohlique producto, 

 injlato ; latere postico acumiiiato, breviusculo, 

 leviter bicostato, margine dorsali dejyresso, ared 

 laevigaid : umbonibtts rotundis. 



The ivory L^da. Shell slightly attenuated, pyriform, 

 covered with a pale epidermis, sculptured with 

 very close concentiic ridges ; anterior side rather 

 obliquely produced, inflated ; posterior side 

 acuminated, rather short, slightly bicostated, 

 dorsal margin depressed, area smooth ; umboes 

 rounded. 



SowEUBY. Proc. Zool. Soc. 1832, p. 198. 



Xucula lyrata. Hanley. 



Hah. Bay of Panama. 



Species 30. (Fig. a, b, Mus. Brit.) 



L^DA ventricosa. Lced. testd solidd, fulvd, ventrieosd, 

 ovatd, Kris numerosis concentricis aqualibus 

 sculptd ; latere antico lata, tumido ; latere postico 

 breviusculo, svhrostrato ; areis dorsalibus co/npla- 

 natis, vix definitis; umbonibus subacuminatis. 



The VENTRICOSE L^DA. Shell solid, fulvous, ventri- 

 cose, ovate, sculptured with numerous equal con- 

 centric ridges ; anterior side wide, tumid ; pos- 

 terior side rather short, subrostrated, dorsal areas 

 flattened, scarcely defined ; umboes subacumi- 

 nated. 



Hinds. Proc. Zool. Soc, 1843, p. 100. 



One of the most solid and ventricose shells of the 



pyriform group. 



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



LiEDA FASTiDiosA. Lced. testd parvd, pyriformi, stra- 

 mined, Icevigatd, nitenti ; latere antico breviitsculo, 

 rotundato ; latere postico attenuato, acuminato, 

 ared dorsali depressd, co7nplanatd, latiiisculd. 



The fastidious Ljeda. Shell small, pyriform, straw- 

 coloured, smooth, shining ; anterior side rather 

 shorter, rounded ; jiosterior side attenuated, 

 acuminated, dorsal area depressed, flattened, 

 rather wide. 



A. Adams. Proc. Zool. Snf., ]8")G. p. 49. 



I/ab. New Zealand. 



A bright little species, smooth like Lccda fulgida, 

 but more attenuated and sharply pointed posteriorly. 



