354 TESTACEOUS MOLLUSCA. 



Philippi's ' Abbildungen,' Chenu's II. Conch, and Dunker's Guinea 

 Shells. 



Cytherea petechialis, p. 96, t. 15, f. 9 ... C. wipudica, p. 96, t. 11, 

 f. 10 ... C. meretrix, p. 96, t. 15, f . 8 ... C. graphica, p. 96, t. 15, 

 f. 11 ... C. zonaria, p. 96, t. 15, f. 10 ... C. purpurata, p. 97, t. 15, 

 f. 30 ... C. nivea, p. 97, t. 11, f. 34 ... C. lilacina, p. 98, 1. 15, f. 12 

 ... C. impar, p. 98, t. 11, f. 7 ... C.florida, p. 98, t. 13, f. 22 ... 

 C. nitidula, p. 98, t. 13, f. 19 ... C. citrina, p. 99, t 13, f. 23 ... 

 C. albina, p. 99, t. 13, f. 20 ... C. Mactroides, p. 99, t. 13, f. 17 ... 

 C. trigonella, p. 99, t. 13, f. 18 ... C. sulcatina, p. 99, t. 9, f. 13 ... 

 C. Hebrcea, p. 99, t. 13, f. 21 ... C. tigrina, p. 100, t. 15, f. 13 ... 

 C. Venetiana, p. 100, t. 13, f. 34 ... C. Guineensis, p. 100, t. 15, 

 f. 23 ... C. trimaculata, p. 101, t. 10, f. 5 ... G. abbreviata, p. 103, 

 t 13, f. 29 ... C. bicolor, p. 104, t. 15, f. 16 ... C. lubrica, p. 104, 

 t. 9, f. 10 ... C. rosea, p. 104, t. 9, f. 11 ... C. tortuosa, p. 104, t. 15, 

 f. 22 ... G. squalida, p. 104, t. 13, f. 40 ... C. hieroglyphica, p. 104, 

 t. 15, f. 29 ... G. pannosa, p. 105, t. 15, f. 14 ... C. unicolor, p. 105, 

 t. 15, f. 28 ... C. argentina, p. 105, t. 15, f. 15 ... C. convexa, p. 105, 

 t, 15, f. 34 ... G. floridella, p. 105, t. 15, f. 17 ... C. plamdata, p. 105, 

 t. 13, f. 25 ... C. Crassatelloides, p. 106, t. 15, f. 32 ... C. plicatina, 

 p. 108, t. 13, f. 32 ... C. effossa, p. 109, t. 15, f. 18 ... C. excavata, 

 p. 109, t. 15, f. 19. 



Cytherea cor (t. 15, f. 7), Hard. Z. P. 1844, p. 110.— C. Tel- 

 linoidea, Sow. Th. 2, p. 634, t. 136,/. 191. — Dione c. Desk. Verier, 

 p. 71. Cordate- trigonal, white within and without, but little convex, 

 with very crowded slender regularly disposed concentric striae ; the 

 front side longer, and somewhat wedge-shaped ; ligamental margin 

 much sloping, slightly convex ; ventral edge entire, subarcuated ; 

 beaks acute; lunule oblong, impressed. f...l. Africa. Epidermis 

 white and velvety. 



Cytherea aurantia (t. 15, f. 20). — C. aurantiaca, Sow. G. — 

 Reeve, C. S. t. 69, /. 3.— C. aurantia, Sow. Th. 2, p. 628, t. 132, 

 /. 97. — Dione a. Desh. Vener. p. 56. Ovate-subcordiform, inequi- 

 lateral, solid, ventricose, smooth, under a tawny orange horny epider- 

 mis of an orange-tinted flesh-colour, with the beaks white ; ventral 

 edge arcuated, entire; extremities rounded, the front one usually 

 attenuated when mature ; hinder dorsal edge not incurved ; lunule 

 not sunken, elongated ; umbones prominent ; ligament large and 

 projecting; inside white, with a purple spot on the front dorsal edge. 

 4. Mexico. 



Cytherea ovum (t. 15, f. 21), Hani. Z. P. 1845, p. 21.— Sow. 

 Th. 2, p. 621, t. 129, /. 45. — Meretrix o. Desh. Vener. p. 34. 

 Ovate, very solid, equilateral, ventricose, glossy, smooth, whitish, 

 under a tawny epidermis ; ventral edge entire, arcuated ; both dorsal 



