354 TESTACEOUS MOLLUSCA. 
Philippi’s ‘ Abbildungen,’ Chenu’s Il. Conch. and Dunker’s Guinea 
Shells. 
rae petechialis, p. 96, tt, £. One impudica, p. 96, t. 11, 
£0: x -Comeretria, p. 96.4%. 407 1388 ae graphica, p. 96, t. 15, 
f. 11... C. zonaria, p. 96, t. 15, f. NOM a purpurata, p. 97, t. 15, 
f. 30 ... C. nivea, p. 97, t. 11, f. 34 ... C. lilacina, p. 98, t. 15, f. 12 
Clonpar, p. 98,411, 1. 1)..2Cifonida, Probyte lis, £122 eer 
C. nitidula, p.98,\t. 13;:4..19 ... C. cttrina, ip. 99, 18, fe23e0¢ 
C. albina, p. 99, t. 18, f. 20... C. Mactroides, p. 99, t. 18, f. 17 ... 
Cu trigonellay px 99, t- 18; £.: 18). .0C. suleatina;p.99; t.09; f. Udiscc 
C. Hebrea, p. 99, t. 18, f. 21. oa tigrina, p. 100, t. 15, f. 138. 
C. Venetiana, p. 100, t. 13, f. 34 . C. Guineensis, p. 100, t. 1 
f. 23... C. trimaculata, p. 101, t. 10, f. 5... C. abbreviata, p. 108, 
£13, .4539\2.(C. bicolor, pi 04, 4, 25,4. 16 ... C. lubrica, p. 104, 
t. 9, f. LO. ie? rosea, p. 104, t. 9, f. 11 ... C. tortwosa, p. 104, t. 15, 
$22 60 LC. squalid, p: 104, & 13,.f Pe a Pe p- 104, 
£,11.5; _ 29 ... C. pannosa, p. 105, t. 15, f. Fe . C. unicolor, p. 105, 
fo, f. 28 Gh argentina, p. 105, t. 15, f. 15... C. conveaa, p. 105, 
tf. 34 iG floridella, p. 105, t.15, f. hye ei i ic se p- 105, 
tS Ok OL eins wae p. 106; t. ite f. 32 ... C. plicatina, 
p. 108, t. 13, f. 32... C. effossa, p. 109, t. 15, f. 18 ... C. excavata, 
prL09, ts 16,.£5.19: 
CYTHEREA ©oR (t. 15, f. 7), Hanl. Z. P. 1844, p. 110.—C. Trt- 
LINOIDEA, Sow. Th. 2, p. 634, t. 186, f. 191.—Diong c. Desh. Vener. 
p. 71. Cordate-trigonal, white within and without, but little convex, 
with very crowded slender regularly disposed concentric striz; the 
front side longer, and somewhat wedge-shaped; ligamental margin 
much sloping, slightly convex; ventral edge entire, subarcuated ; 
beaks acute; lunule oblong, impressed. 4...1. Africa. Hpidermis 
white and velvety. 
CYTHEREA AURANTIA (t. 15, f. 20)—C. aurantiaca, Sow. G.— 
Reeve, C. S. t. 69, f. 3.—C. aurantia, Sow. Th. 2, p. 628, t. 132, 
f.97.—Dionet 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), Hanl. Z. P. 1845, p. 21.— Sow. 
Th. 2, p. 621, t. 129, f. 45.— Mererrix o. Desh. Vener. p. 34. 
Ovate, very solid, equilateral, ventricose, glossy, smooth, whitish, 
under a tawny epidermis; ventral edge entire, arcuated ; both dorsal 
