APPENDIX. 357 



Artemis hepatica (as Cytherea h. p. 101), 1. 13, f. 33 ... A. lucinalis 

 (as Cytherea I. p. 101), 1. 13, f. 30 ... A. lunaris (as Cytherea I. p. 101), 

 t. 13, f. 31 ... A. ponderosa, p. 106, t. 15, f. 38 ... A. bilunulata, 

 p. 107, t. 15, f. 44 ... A. Africana, p. 107, t. 15, f. 40. 



Artemis subquadrata (t. 15, f. 39), Hani. Z. P. 1845, p. 11.— 

 Reeve, I. Art./. 15.— Sow. Th. 2, p. 661, t. 141,/. 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. If. W. Columbia. 



Artemis simplex (t. 15, f. 41), Hani. Z. P. 1845, p. 11. — Reeve, 

 I. Art./. 59.— Sow. Th. 2, p. 657, 1. 140,/. 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 ; lunule sunken, not large ; no 

 impressed ligamental area. If. Panama. The greatest length is 

 from the beaks to the opposite margin. 



Artemis sculpta (t. 15, f. 42), Hani. Z. P. 1845, p. 12. — Reeve, 

 I. Art. f. 52. — Sow. Th. 2, p. 659, t. 141, / 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 striae ; 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 area; beaks not prominent. If. ..2. Australia? 



Artemis scalaris (t. 15, f. 43). — Cytherea s. Menke, N. Hoi. — 

 A. s. Sow. Th. 2, p. 674, t. 144, /. 78. — Reeve, I. Art. /. 11.— 

 Dosinia 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 

 lyree, 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. 2f. 

 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 Deshaves ; V. callosa is distinct from 



