Zoological Society. 229 



sand. Straits of Macassar ; Lagulhas Bank, Cape of Good Hope : 

 from seventy fathoms, on a gravelly bottom. 

 Cab. Belcher et Cuming. 



CoRBULA cuNEATA. Covh. testd ovato-trigond, aquilaterali, soUdd, 

 complanatd, sulcatd, antice rotundatd, postice angulatd ; valvis 

 subcequalibus , marginibus ventralibus gibbosis inclausis ; umbonibus 

 rectis ; intks 'purpurascente . Long. 7 ; lat. 3 ; alt. 5 lin. 



Hab. Catbalonga, Philippine Islands ; from ten fathoms, soft mud. 

 Lagulhas Bank, Cape of Good Hope ; from seventy fathoms. 



Cab. Belcher et Cuming. 



CoRBULA PALLIDA. Covb. tsstd ovutd, tcnui, elevatiusculd, sulcatd^ 

 antice rotundatd, postice ab umbonibus ad marginem posticam an- 

 gulatd, valvcB dextne margine ventrali acuta, inflewd ; umbonibus 

 Icevigatis, rectis ; intiis prope cardinem rosed. Long. 7^ ; lat. 3 ; 

 alt. 5 lin. 



Hab. } 



Cab. Cuming. 



CoRBULA siMiLis. Corb. testd ovatd, solidd, sulcatd, antice ele* 

 vatiusculd, rotundatd, postice ad marginem posticam oblique trun- 

 catd, ab umbonibus angulatd ; valvis inaqualibus, dextrd margine 

 ventrali subacutd, productd ; umbonibus subobliquis ; intiis rosed, 

 dente valvce sinistra bifido. Long. 6 ; lat. 8 ; alt. 4 lin. 



Hab. Island of Corregidor, Bay of Manila; in seven fathoms, 

 coarse sand. 



Cab. Cuming. 



CoRBULA scAPHoiDES. Corb. tcstd oblongd, ordinate sulcatd, in- 

 terstitiis Iccvissime striatis, antice rotundatd, postice elongatd, ad 

 extremitatem oblique truncatd, ab umbonibus subcarinatd ; valvce 

 dextrce margine ventrali acuta, productd; umbonibus rectis. Long. 

 6 ; lat. ^ ; alt. 3^ lin. 



Hab. Singapore ; from seven fathoms, sandy mud. Bais, island 

 of Negros, Philippines. 



Cab. Cuming. 



CoRBULA FRAGiLis. Corb. tcstd ovtttd, tcnui, albidd, striatd, striis 

 transversis minutissime reticulata, antice subproductd, rotundatd, 

 postice elongatd, ab umbonibus subrotundatd ; valvce dextree mar- 

 gine ventrali acuta, productd ; umbonibus rectis, lavigatis, aquali- 

 bus. Long. 7 ; lat. 3 ; alt. 4 lin. 



Hab. West coast of Veragua ; from eighteen fathoms, mud. 



Cab. Belcher. 



CoRBULA ALBUGiNOSA. Corb. testd rctuso-ovatd, tenui, antic^ ro- 

 tundatd, fostice subelongatd, rotundatd ; valvis valde disparibus, 

 dextrd longitrorsum striatd, pallida, margine ventrali productd, 

 acuta, sinistrd Icevigatd, lineis elevatis radiantibus, epidermide 

 fused indutd ; umbonibus albidis, nitidis, incequalibus . Long. 4^ ; 

 lat. 2 ; alt. 3^ hn. 



Hab. Nevir Guinea ; Straits of Macassar : from seven to twenty- 

 two fathoms, mud and coarse sand. 



Cab. Belcher. 



