APPENDIX. 357 
Artemis hepatica (as Cytherea h. p. 101), t. 13, f. 33 ... A. lucinalis 
(as Cytherea l. p. 101), t. 13, f. 30... A. lunaris (as Cytherea Ll. p. 101), 
t. 13, f. 31 ... A. ponderosa, p. 106, t. 15, f. 88 ... A. bilunulata, 
p- 107, t. 15, f. 44... A. Africana, p. 107, t. 15, f. 40. 
ARTEMIS SUBQUADRATA (t. 15, f. 39), Hanl. Z. P. 1845, p. 11.— 
Reeve, I. Art. f.15.—Sow. Th. 2, p. 661, t. 141, f. 27. Suborbicular- 
subquadrate, broader than long, compressed, a little pellucid, very 
inequilateral, whitish both within and without, concentrically sub- 
striated ; ventral edge arcuated in front; convex and rising behind ; 
dorsal edge straightish and decidedly sloping in front, convex and 
not sloping behind; anterior end very broad, posterior end narrow ; 
lunule large, nearly obsolete. 13. W. Columbia. 
ARTEMIS SIMPLEX (t. 15, f. 41), Hanl. Z. P. 1845, p. 11.—Reeve, 
I. Art. f.59.—Sow. Th. 2, p. 657, t. 140, f. 6. Orbicular-subtrigonal, 
rounded at both ends, solid, subinequilateral, glossy, ivory-white, 
ventricose, with concentric subimbricated moderately distant sulci; 
ventral edge arcuated; both dorsal edges abruptly sloping, the front 
one arcuated, the hinder one retuse; Iunule sunken, not large; no 
impressed ligamental area. 13. Panama. The greatest length is 
from the beaks to the opposite margin. 
ARTEMIS scuLpTa (t. 15, f. 42), Hanl. Z. P. 1845, p. 12.—Reeve, 
I. Art. f. 52.— Sow. Th. 2, p. 659, t. 141, f. 15. Orbicular-sub- 
quadrate, more or less ventricose, rather strong and glossy, of a 
dirty white or very pale ochre, with very crowded concentric sulci, 
which are subimbricated in the middle and lamellar at the extremities, 
where they are crossed by radiating strie ; ventral edge subarcuated ; 
dorsal edge rather convex and hardly sloping in front, retuse and 
slightly sloping behind ; lunule sunken, ovate-heart-shaped ;_ no liga- 
mental arca; beaks not prominent. 14...2. Australia? 
ARTEMIS SCALARIS (t. 15, f. 43).—CyrHEerEa s. Menke, N. Hol.— 
A. s; Sow. Th. 2, p. 674, t. 144, f. 78.— Reeve, I. Art. f. 11.— 
Dosinta s. Desh. Vener. p. 22.  Suborbicular, usually transverse, at 
most subventricose, moderately strong, glossy, livid rufous, often with 
2 or 3 rays and a few concentric rings of white, always whitish at 
the hinder dorsal corner; with numerous closely arranged concentric 
lyre, which are depressed and more or less shelving in the middle, 
but narrower and sublamellar at the sides; anterior extremity angu- 
lated above, rounded below, ligamental edge convex, not much 
sloping, dorsal area planulate or slightly shelving; lunule profound, 
not large; beaks much inclined, tipped with rusty orange. 23. 
Australia. 
On Venus (p. 109). Venus pectinula (p. 115) proves to be identical 
with the V. ovata of the following page; V. lagopus (p. 115) and 
V. gallinula are identical, teste Deshayes; V. callosa is distinct from 

