APPENDTX. 341 



p,37, 1. 10, f. 54 ... C. ornata, p. 87, 1. 12, f. 13 ... C. undulata, p. 37, 

 t. 12, f. 24 ... C. gibbosa, p. 37, t. 13, f. 16 ... C. radiata, p. 37, 

 t. 11, f. 15. 



On Mesodesma. Consult Reeve's monograph in the ' Conchologia 

 Iconica.' 



Mesodesma Donacium, p. 38, 1. 10, f. 56 ... M. complanatum, p. 38, 

 t. 10, f. 55 ... M. Erycinceum, p. 38, t. 12, f. 26 ... M. Donacillum, 

 p. 39, t. 11, f. 39 ... M. corneitm, p. 39, t. 11, f. 40 ... M. glabellum, 

 p. 39, t. 11, f. 6 ... M. Solenoide, p. 39, t. 10, f. 3 ... M. arctatum, 

 p. 39, t. 9, f. 55. 



Mesodesma planum (t. 12, f. 19), Hani Z. P. 1843, 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. £...l. The teeth are obtuse; the lateral ones 

 short and approximate. From the little convexity of the dorsal edges, 

 the beaks appear extremely angulated. 



Mesodesma triquetrum (t. 12, f. 20), Hani. 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, f.,.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. 43, t. 12, f. 32 ... A. corrugatum, p. 44, 

 t. 12, f. 21 ... A. rupium, p. 44, t. 12, f. 50 ... A. lave, p. 44, t. 12, 

 f. 10 ... A. purpurascens, p. 44, t. 12, f. 45 ... A.formosum, p. 44, 

 t. 12, f. 48 ... A. pallidum, p. 44, t. 12, f. 44 ... A. roseum, p. 44, 

 t. 12, f. 35 ... A. lenticulare, p. 44, t. 12, f. 49 ... A. rubrolineatum , 

 p. 44, t. 12, f. 51 ... A. decisum, p. 44, t. 12, f. 52 ... A. pulchrum, 

 p. 45, t. 12, f. 6 ... A '.. punctatum, p. 45, t. 12, f. 4.6. 



Amphidesma proximum (t. 12, f. 5, as A. corrugatum), Adams, 

 Shells Pan. p. 2, from Ann. Lye. 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 striolae ; ventral edge much arcuated ; 

 dorsal slopes decided, the front area retuse, ligamental edge convex ; 

 flexure slight; beaks acute, prominent, inclined; lunule small, 



