purea vel nivea, postice crcrulea, ad umbones fusco maculata ; latere 

 antico brevi, sulcis rcgularibus concentricis cincto; umbonibus 

 sulcatis, prominentibus ; lunula cordiformi, subexcavata. 



Shell oval, thick, ventricose, shining, with the anterior side 

 short and round, and sulcated ; the umbones prominent and sul- 

 cated ; the lunule broad, heart-shaped, and hollow. 



Fig. 64 (Mr. Cuming's), from Brazil, purple; fig. 63 (Mr. 

 Cuming's), lied Sea, part purple, very oblique; fig. 65, 66, C. 

 nivea, Hanley, white, with bluish posterior side : all angularly 

 marked with brown at the umbones. 



38. CytheRjEA erycina (pi. exxx. f. 69). Venus crvcina, 

 Linn. 1131. Chemn, Conch, f. 337. 



Cyth. testa ovali, crassa, concentrice planulatim sulcata, medio 

 fusca, ad margines aurantia, prope marginem dorsalem fusco et albo 

 maculata, omnino fusco ct albo interruptim radiata ; latere antico 

 brevi ; lunula distincta, aurantia. 



Shell oval, thick, brown at the upper part, orange towards the 

 margin, with a band of white on each side of the lunule, and 

 dorsal margin crossed by zigzag markings of brown, radiated 

 with broad interrupted bands of brown and white, concentrically 

 ridged ; the ridges broad and flat. 



Philippines. Mus. Cuming. 



39. CYTHEEiEA MULTIRADIATA (pi. CXXX. f. 76), SotVer6f/,JUn. 



Cyth. testa C. erycina simili, sed costis obsoletis. 



Like C. erycina, but with the ribs, excepting on a small part of 

 the anterior, obsolete ; in the colouring there are also some linear 

 rays with undulating lines between. 



Bay of Manilla. Cuming. 



40. Cyther^ia costata (pi. exxx. f.70, 71), Chemn. f. 1975. 

 Wood, Suppl. pi. 7. f. 39. Hanley, Sp. of Shells, p. 106. Yar. 

 C. Pacifica, Dilhvyn, p. 175 ? 



Cyth. testa C. erycina simili, sed costis rotundatis, clevatis, 

 alba, lineis fuscis distanter radiata, vel fulva, fusco-nigrescente 

 radiatim fasciata. 



Like C. erycina, but with the ribs rounded and elevated ; white, 

 with interrupted linear brown rays, or of a dull greyish-brown, 

 with dark broad rays. 



Fig. 70, from Swan Eiver ; fig. 71, from Port Essington. Jukes. 



