

342 TESTACEOUS MOLLUSCA. 



lanceolate ; inside ochraceous yellow. 2i. Mexico. The epidermis 

 is usually ochraceous in front. 



Amphidesma Zebtjense (t. 12, f. 7), Hani. Z. P. 1844. — Reeve, 

 I. Amp. f. 25. — Semele gratiosa, Adams, teste Reeve. Obliquely- 

 ovate, solid, very inequilateral, slightly convex, whitish, with pale 

 red rays, and short crowded concentric lamellae, whose intervals are 

 usually divided by a concentric raised stria ; anterior side short, 

 rounded ; hinder margin incurved ; ventral edge strongly arcuated ; 

 inside white, with two red rays at the umbones. If ...2. Philip- 

 pines. The colouring matter seems deposited on the lamella only. 

 The lunule is rather large for the genus. 



Amphidesma radiatum (t. 12, f. 8, as A. Australe), Say, J. Ac. 

 Philad. vol. 5 (1825), p. 220. — A. subtruncatum, Reeve fas of Sow.), 

 Ic. Amp. f 11. — Sow. Spec. Con. pt. 2, 1 Amp. f. 3. Transversely 

 suborbicular, subequilateral, bluntly subangulated and flexuous in 

 front, rounded behind, not solid, convex or subventricose, yellowish 

 white, with numerous narrow rays of ruddy flesh-colour on the disk, 

 and short waved lines of the same hue on the two slopes, rough with 

 concentric membranaceous wrinkles, and almost imperceptibly minute 

 radiating striolae ; slope of the dorsal edges decided, subequal ; inside 

 yellow. 1£. Jamaica. This shell was figured as Australe, having 

 been found so named in a collection arranged by Mr. Sowerby. It 

 does not agree, however, with the type, although not unlike the drawing 

 in the ' Conchological Illustrations' It agrees fairly with the descrip- 

 tion of A. Jayanum in Adams' 1 Jamaica Shells (Proc. Bost. ii. 1845). 



Amphidesma carnicolor (t. 12, f. 28), Hani. Z. P. 1844, p. 162. 

 — Reeve, I. Amp.f 6. Suborbicular, convex or subventricose, rather 

 thin, subequilateral, pink or flesh-coloured without, orange within, 

 concentrically lam ellated throughout; lamellae frequent, membrana- 

 ceous, serrated at the edge, their intervals set with most crowded 

 minute radiating wrinkles ; ventral edge rounded, entire ; both dorsal 

 edges short, straightish, and about equally sloping ; anterior slope 

 impressed. 1 ... 1 . Philippines. 



Amphidesma scabrum (t. 13, f. 9), Hani. Z. P. 1844, p. 17. — 

 Reeve, I. Amp.f. 33, probably. Obovate, convex, solid, subequilateral, 

 white, with chestnut-red linear rays, and short thin crowded lamellae, 

 whose intervals are most minutely striated lengthways ; anterior side 

 subangulated, hinder-side rounded ; ventral edge arcuated, rising in 

 front ; inside pale orange, stained with purplish red on the cartilage- 

 pit and beneath the lunule. 2...2£. Philippines. 



1 The unfinished part was only published in December, 1855. 

 The numerals upon the plates do not correspond with the references 

 in the text. 



