MOLLUSCA. 69 



from such an indifferent shell, that it was almost by accident I discovered it was 

 to apply to my specimens. I have therefore been under the necessity of record- 

 ing a new description. 



287. Corbula modesta, Hinds, 1. c. p. 57, (Plate XX. fig. 9.) Testa ovato-trigona, com- 

 planata, pallida, radiata., profunde sulcata, antice rotundata, postice ad extremitatem truncata, ab 

 umbonibus angulata ; valvarum marginibus ventralibus inclausis; umbonibus parvis, subsequalibus, 

 roseis; intus rosea. 



Inhab. Straits of Macassar; from seven fathoms, coarse sand. 



288. Corbula solidula, Hinds, 1. c. p. 58. Testa, parva, ovata, subtrigona, solidula, eleva- 

 tiuscula, sequilaterali, sulcata, antice rotundata, postice angulata ; valvarum marginibus ventralibus 

 inclausis, gibbosis ; umbonibus rectis lsevigatis. 



Inhab. Straits of Macassar; from seven fathoms, coarse sand. 



289. Corbula marmorata, Hinds, 1. c. p. 58, (Plate XX. fig. 13.) Testa parva, oblonga, soli- 

 dula, laevigata., marmorata, antice rotundata, postice subangulata ; valvarum marginibus ventralibus 

 inclausis ; umbonibus obliquis, anticis ; ante umbones sanguineo maculata.. 



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



290. Corbula eburnea, Hinds, 1. c. p. 58, (Plate XX. fig. 14.) Testa parva., ovata, subtrigona, 

 eburnea, solidula, complanata, laevigata, obsolete sulcata ; margine ventrali gibbosa. ; umbonibus 

 parvis, subrectis, nitidis ; intus cornea. 



Inhab. North coast of New Guinea. From seven to sixty fathoms, coarse 

 sand and mud. 



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

 more triangular shape, polished, ivory-like, flattened valves, and the slightly sul- 

 cate sculpture. 



291. Corbula Icevis, Hinds, 1. c. p. 59, (Plate XX. fig. 15.) Testa ovali, aaquilaterali, pallida, 

 tenui, laevigata, complanata; valvae dextras margine ventrali acuta, producta; umbonibus rectis, 

 suberosis. 



Inhab. Hong-Kong, China. 



Both valves are flattened towards their ventral margins in a very charac- 

 teristic manner. 



Ne^ira. Gray. 

 Necera, Gray, 1834; Cuspidaria, Nardo, 1839. 

 292. NEiERA elegans, Hinds, Proceed. Zool. Soc. 1843, p. 76, (Plate XX. fig. 18.) Testa 



