APPENDIX. 34] 
p- 87, t.10, f.54 ... C. ornata, p. 37, t.12, f£.13 ... C. undulata, p. 37, 
t. 12, f. 24 ... C. gibbosa, p. 37, t. 12, f. 16 ... C. radiata, p. 37, 
1s EL lead We 
On Mesoprsma. Consult Reeye’s monograph in the ‘ Conchologia 
Iconica.’ 
Mesodesma Donacium, p. 38, t. 10, f. 56... M. complanatum, p. 38, 
t. 10, f. 55... M. Hrycineuwn, p. 38, t. 12, f. 26... M. Donacillum, 
p- 39, t. 11, f. 39... M. corneum, p. 39, t. 11, f. 40 ... M. glabellum, 
p: 99, t. 11, £6... M. Solenoide, p. 39, t. 10, £3 ... M. arctatum, 
prs,’ t: 95f. 55: 
MEsopEsMA PLANUM (t. 12, f. 19), Hanl. Z. P. 18438, p. 102.— 
Reeve, I. Mes. f. 16. Ovate-sublenticular, transverse, very compressed, 
inequilateral, rounded at each extremity, whitish under a horn-coloured 
epidermis, smooth; beaks acute, elevated; ventral edge arcuated ; 
cartilage-pit narrow. $...1. The teeth are obtuse; the lateral ones 
short and approximate. From the little convexity of the dorsal edges, 
the beaks appear extremely angulated. 
MesopESMA TRIQUETRUM (t. 12, f. 20), Hanl. Z. P. 1843, p. 101. 
—Reeve, I. Mes. f. 28. Obliquely triangular, very inequilateral, 
extremely thick, swollen, smoothish, dirty white; produced and 
somewhat acuminated and beaked in front; short and rounded 
behind; anterior edge sloping; ventral margin arcuated; anterior 
slope depressed; the cartilage-pit visible externally between the 
distant beaks; lateral teeth large and strong. %...1. Van Dieman’s 
Land. The cardinal tooth is bifid in the left valve. 
Erycina Cardioides, p. 40, t. 10, f. 57. 
Ungulina oblonga, p. 40, t. 10, f. 44. 
Solemya Australis, p. 41, t. 11, f. 25. 
Amphidesma solidum, p. 48, t. 12, f. 82... A. corrugatum, p. 44,~ 
. 12, f. 21 ... A. rupium, p. 44, t. 12, f. 50 ... A. lave, p. 44, t. 12, 
10 ... A. purpurascens, p. 44, t. 12, f. 45 ... A. formosum, p. 44, 
. 12, f. 48... A. pallidum, p. 44, t. 12, f. 44 ... A. roseum, p. 44, 
. 12, f. 35 ... A. lenticulare, p. 44, t. 12, f. 49 ... A. rubrolineatum, 
. 44, t. 12, f. 51... A. decisum, p. 44, t. 12, f. 52... A. pulehrum, 
p- 45, t. 12, f. 6 ... A. punctatum, p. 45, t. 12, f. 46. 
AMPHIDESMA PROXIMUM (t. 12, f. 5, as A. CORRUGATUM), Adams, 
Shells Pan. p. 2, from Ann. Lyc. N. York, vol. 5 (1852), p. 513.— 
Reeve, Ic. Amp. f.20. Transversely suborbicular, bluntly subangular 
in front, equilateral, thick, convex or subventricose, uniform white 
under a very thin somewhat olivaceous grey epidermis, smooth near 
the umbones, elsewhere with close concentric wrinkles and densely 
disposed indistinct radiating striole; ventral edge much arcuated ; 
dorsal slopes decided, the front area retuse, ligamental edge convex ; 
flexure slight; beaks acute, prominent, inclined; lunule small, 
es sera ert Fat ene 
