Zoological Society. 231 



lidd, radiatd, pro/unde sulcata, antice rotundatd, postice ad extre- 

 mittttem truncatu, ab u7nbonibus angulatd ; valvarum marginibus 

 ventruUbus inclausis ; umbonibus imrvls, siibcequalibus, roseis ; 

 intus rosed. Long. 7 ; lat. 3| ; alt. 5 lin. 



Hub. Straits of Macassar ; from seven fathoms, coarse sand. Ticao, 

 Philippine Islands ; from eight fathoms, sandy mud. The Macassar 

 specimens are of a dwarf size. 



Cab. Belcher et Cuming. 



CoKBULA soLiDULA. Cofb. tcstd pcirvd, ovtttd, subtrigoud, soliduld, 

 elevatmsculd, cBquilaterali, sulcatd ; antice i^ottindatd, postice an- 

 gulatd ; valvarum marginibus ventralibus inclausis, gibbosis ; um- 

 bonibus rectis, Itevigatis. Long. 2 ; lat. 1 ; alt. l^lin. 



Hub. Straits of Macassar ; from seven fathoms, coarse sand. Bais, 

 island of Negros, Philippines. 



Cab. Belcher et Cuming. 



CoRBULA MARMORATA. Corb. tcstd parvd, oblongd, soliduld, Icevi- 

 gatd, marmoratd, antice rotundatd, postice subangulatd ; valvarum 

 marginibus ventralibus inclausis ; umbonibus obliquis, anticis ; ante 

 umbones sanguineo maculatd. Long. 2 ; lat. 1 ; alt. 1^ lin. 



Hab. West coast of Veragua; from twenty-six fathoms, mud. 



Cab. Belcher. 



CoRBULA EBURNEA. Corb. tcstd parvd, ovatd, suhtrigond, eburned, 

 soliduld, complanatd, Icevigatd, obsolete sulcatd ; margine ventrali 

 gibbosd ; umbonibus parvis, subrectis, nitidis ; intiis corned. Long. 

 2; lat. 1 ; alt. 1^- lin. 

 Hab. North coast of New Guinea ; Camaguing and Bohul, Phi- 

 lippine Islands : from seven to sixty fathoms, coarse sand and mud. 

 Cab. Belcher et Cuming. 



This shell closely approaches C. solidula, but is distinguished by 

 its somewhat more triangular shape, polished, ivory-like, flattened 

 valves, and the slightly sulcate sculpture. 



CoRBULA MONiLis. Corb . testd minutd, globosd, pallidd, striulatd ; 

 valvis valde incequalibus, dextrd multb maximd, postice elongatd, 

 margine ventrali acutd, jyroductd; umbonibus rectis, IcBvigatis. 

 Long. 1 ; lat. ^ ; alt. ^ lin. 

 Hab. Sual, Luzon, Philippine Islands ; from five to seven fathoms, 

 sandy mud. 

 Cab. Cuming. 



A small globose species remarkable for the inequality of the valves, 

 the left being sunk into the right. The latter valve is also distin- 

 guished by the posterior nasute elongation. 



CoRBULA FASCiATA. Corb. tcstd ovatd, subtrigond, Itevigatd, pallidd, 

 atro-fusco trifasciatd, antice productd, rotundatd, postice elongatd, 

 ab umbonibus arcuate angulatd ; valvarum marginibus ve7itralibus 

 acutis, convexis, dextrce productd; umbonibus rectis, suberosis. 

 Long. 6| ; lat. 2^ ; alt. 4 Hn. 

 Var. Testd pallidd, postice subproductiori. 



Hab. St. Juan, province of Illocos, and Agoo, province of Panga- 

 sinan, Luzon, Philippine Islands. 

 Cab. Cuming. 



