60 TESTACEOUS MOLLUSCA. 



smooth, pellucid, glossy, white with pink short broken zigzag lines ; 

 hinge with a single tooth. £.. 1-L. — Guinea. 



P. Pacifica. Conr. Jour. A.N.S. Phil 7. p. 241. t. 18./. 13. 

 Sub-oval, convex, anteriorly rather shorter, margin direct and slightly 

 arcuated ; generally purple, with darker zones and two pale anterior 

 rays, (sometimes white, pink, flesh or yellowish with purple rays,) 

 with very obscure radiating lines. -J. — JJ, Califoimia. 1 



PSAMMOTLEA. 



Transverse, ovate, or oblong-ovate ; slightly gaping at the sides / 

 a single primary tooth in each valve, {sometimes in one valve 

 only;) without the irregular plait of the Tellium. 



P. Violacea. Lam. 1. — Bl. t. 78. f. 2. Ovate-oblong, trans- 

 versely striated, rather ventricose, violet with or without paler or 

 even white rays. 1-J. — New Holland. Variety, with purple rays 

 on a white ground (P. Serotina. Lam. 5. — P. Viol. Sow. G.f. 

 2.— Reeve, t. 53./. 2.)—E. Indies. 



P. Zonalis. Lam. 2. — Del. t. 5. f. 9. Ovate oblong, sub- 

 equilateral, ventrally but little rounded, anteriorly sub-angulated, 

 posteriorly rounded, compressed, yellowish with indistinct livid bands 

 and rays, with striae of growth and anastomosing vertical lines. 1^. 



P. Pellucida. Lam. 4. — Del. t. 5. f. 10. Oval-oblong, de- 

 pressed thin whitish, pellucid ; the anterior side lanceolate, folded 

 and sub angulated : hinge with two teeth in one valve and none in 

 the other. 1-f. 



P. Candida. Lam. 6. — Grif. Cuv. t. 12. f. 10. Oval-oblong, 

 thin, pellucid ; with some radiating longitudinal and very fine trans- 

 verse striae ; the anterior side very short and angular ; the cardinal 

 tooth of each valve cleft. 2. — New Holland. 



P. Tarentina. Lam. 7. — Delt.b.f. 11. Roundish-ovate, 

 sub-depressed, rounded and shorter on the posterior side, whitish, 

 decussated by fine arched transverse and extremely fine vertical striae : 

 beaks yellow. 1. — Mediterranean. — Much resembling Tellina 

 Solidula. 



P. Donacina. Lam. 8. — Del. t. 5.f. 12. Ovate, sub-depressed, 

 anteriorly narrower shorter and sub-angulated, whitish with distant 

 purplish red rays and elegant fine transverse striae : inside rich 

 yellow. •§- . — Europe ? 



P. Rosea.— Solen R— Gmel. 3227.— D. p. 66. — Ch.f. 55.— 

 W. t. 3.y. 23. Oblong-elliptical, anteriorly longer, twice as broad 

 as long, under a green epidermis pink flesh colour within and with- 

 out, smooth, rounded at both ends, ventral edge nearly straight ; 

 hinge with a somewhat bifid tooth inserted into a cavity in the 

 opposite valve. 2. — Red Sea. 



1 See too the P. Laskeyi of Turton, (Tellina L. Mont. t. 28. 

 f. 3. — W. t. 4.f. 65.), which we have copied. 



