L /E D A. 



Species 32. (Fig. a, h, Mus. Brit.) 



L.EDA Elkxensis. Lcvd. testd breviusculd, subovatd, 

 suhconcentrice crehre lirafd ; latere antico subacu- 

 minatim roiundato, margine dorsali elevato ; mar- 

 gine ventrali utrinque sursum acclivi, medio con- 

 vexo ; latere postico costd umhonali subarcuatd 

 marginato, rostralo, acuminato ; areis dorsaUbtts 

 latis, definitis. 



The Saint Elena L.eda. Shell rather short, sub- 

 ovate, subconcentrically closely lirateJ ; anterior 

 side siibacuminately rounded, dorsal margin ele- 

 vated, ventral margin sloped upwards at both 

 ends, convex in the middle ; posterior side edged 

 with an umbonal curved rib, beakcil, acuminated ; 

 dorsal areas wide, defined. 



SowERBY. Proc. Zool. Soc, ISo?, p. 108. 



Hub. St. Elena. Panama. 



Species 33. (Mus. Brit.) 



L^DA Mauriti.uia. Lced. testd hrevi, arcuald, albidd, 

 laid, ventricosd, tenuiter concentrici striata, latere 

 antico inflato ; latere postico rostrato, costd 

 rostrali arcuald, elevatd, margine ventrali convexd, 

 ared dorsali depressd, lata, complanatd, dejinitd. 



The JIauuitius L^da. Shell short, arched, whitish, 

 broad, ventricose, finely concentrically striated ; 

 anterior side inflated ; posterior side beaked, ros- 

 tral beak arched, elevated, ventral margin convex, 

 dorsal area depressed, broad, flattened, defined. 



SowERBY. Conch. Illustr. Kucida, f. 17. 



Sab. Ceylon, China, Mauritius. 



i .MAIDEN L-IDA. Shell small, shurt, elevated, oval 

 subtrigonal, white, concentrically finely striain 

 anterior side inflated, rounded, dorsal nun-j 

 sloped, posterior side short, narrow, acumin; 

 ted rostrated; beak smooth; umboes elevatr 

 rounded 



ui.-;. Proc. Zool. Soc, 18'13, p. 100. 



Species 35. (Fig. a, b, Mas. Brit.) 



L.rDA cfXEATA. L(rd. tcsld siditrigonA, brevi. altd, 

 epidermide /icsco-viridi induld, conceiitrice tenuiter 

 striata ; latere antico rotunde subacuminato ; latere 

 postico late angulato, rostrato ; rostro Icevigatu 

 arcuatim producto, ared dorsali depressd, latd, com- 

 ])lanald, definitd, margine ventrali acclivi ; umbu- 

 nibus elevaiis, angulatis. 



The cuneate L .bda. Shell subtrigonal, short, elevated, 

 covered with a brownish-green epidermis, concen- 

 trically finely striated ; anterior side roundly sub- 

 acuminated ; posterior side widely angulated, ros- 

 trated, beak smooth, produced with a curve, dorsal 

 area depressed, wide, flattened, defined ; ventral 

 margin sloped, umboes elevated, angulated. 



SowERuY. Proc. Zool. Soc, 183-2, p. 198. 



La'da inornata, A. Adams. 



Hab. Valparaiso, New Guinea. 



The posterior side form.s a liroad angle like that of 

 Ilipjjopus marulatus. 



Species 3-1. (Mus. Brit.) 

 L.EnA PUELLATA. Ost. tcstd parvd, brevi, elevatd, ovato- 

 suUrigond, athd, concentrice tenuiter striatd; 

 latere antico injlato, rotundo, viargine dorsali 

 declivi ; latere postico brevi, angusto, acuminata, \ 

 rostrato ; rostro laivigato ; umbonibus elevatis, \ 

 rotundis. 1 



Species 3G. (Fig. a, b, Mus. Brit.) 



L^DA ORXATA. Lced. testd acutd, subovatd, albidd, coH- 

 centrice striatd; latere antico ventricoso, pored 

 angustd sulcoque approximato radiato; latere postico 

 angusto, acuminato, producto, acute rostrato, mar- 

 gine dorsali valde depresso, arctiato, ared com- 

 planatd : umbonibus elevatis, acutis. 



September, 1871. 



