44 TESTACEOUS MOLLUSCA. 



A. CoRRUGATUM. Sotv. Z. P. 1832. Sub-orbicular, whitish, 

 longitudinally striated and concentrically wrinkled ; epidermis 

 fuscous, anterior dorsal margin straight and inclined : within yel- 

 lowish. I . . 2^L. — Peru. 



A. AusTRALE. Sow. Z. P. 1832. neeve t. 47. f. 4.— C. I. 

 f. 4. Sub-orbicular, rounded, concentrically wrinkled, whitish 

 with at times pink rays. \. — New Holland. 



A. RupiUM. Sow. Z. P. 1832.— C. /. /. 10. Sub-oval or 

 sub-orbicular, rather irregular, white with sometimes a few rays near 

 the margin, radiatingly striated, concentrically wrinkled by inter- 

 rupted ribs but smooth at the umbones ; inside white, the lateral 

 teeth rather close, short, thick, and as well the anterior dorsal 

 margin, purple. ^-^ . . 1^^, — Pacific. 



A. Ljlve. Sow. Z. P. m3,2.— Reeve, t. AS. f. 6.— C. I. 

 f. 5. Ovate, white, smooth under a thin horn-coloured epidermis, 

 anteriorly shorter and rounded, posteriorly longer and sub-acumi- 

 nated : an obsolete anterior sulcus running from the umbo to the 

 ventral margin. Jq..1-2%. — W. Columbia. 



A. PuRPURAscENs. Sow. Z. P. 1832. {not Lam.) — Reeve 

 t. 48. f. .5. — C. I- f. 5. Oval, purplish, posteriorly rounded, an- 

 teriorly sub-acuminated, sub-truncated, anterior dorsal margin 

 straightish and crenulated, with acute concentric, very crowded, 

 thin, fulvous and crenulated ribs. 13. .1^0. — W. Columbia. 



A. FoRMOSUM. Sow. Z. P.' \8S2.— Reeve, t. 41./. 8.— 

 C. I.fi. 8. Oval, whitish with rosy rays, purple spots, and concen- 

 tric crowded ribs, which are wrinkled at each extremity : umbones 

 yellowish within. -^^..2. — W. Columbia. 



A. Pallidum. Sow. Z. P. IS32.— Reeve, t. 47. f. 3.— C. I. 

 f. 3. Oval, pale purplish, fulvous, darker at the umbones, a thin 

 rather irridescent epidern)is, with delicate concentric striae : ante- 

 riorly truncated, doi'sal margin rounded. Ya-.l^. — W. Columbia. 



A. RosEUM. Sow. Z. P. 1832.— Reeve, t. 47. f. l.— C. I. 

 f. 1. Sub-orbicular, under a brown glossy epidermis, rosy, con- 

 centrically ribbed, anteriorly sub-emarginated, the ribs crowded and 

 acute. l-iL..2J. 



A. Lenticulare. Sow. Z P. 1832. — C. 7. /. 1). White, 

 lenticular, smooth, with delicate radiating strise, which centrally and 

 posteriorly are decussated by other sub-concentric and flexuous 

 ones ; anterior margin sub-flexuous \ epidermis very thin and 

 yellowish. 4\..-^^. — W. Coiumbia. 



A. RuBROLiNEATUM. CoiiT. Jovv. A.N.S. PliU. 7- J>' 239. 

 t. \8. f. 11. Sub-triangular, moderately thick ; anterior side nar- 

 rowed, folded, truncated at its extremity ; beaks central : yellowish 

 with pale red rays: depressions pur))le: inside tinged with purple in 

 the middle, lateral teeth distinct. 1. — TJ. California. 



A. Decisum. Conr. Jour. A. N. S. Phil 7- p. 239. f. 19./. 2. 



