60 TESTACEOUS MOLLUSCA. 
smooth, pellucid, glossy, pehite with pink short broken zigzag lines ; 
hinge with a single tooth. 2..14.—Guinea. 
P. Pacrrica. Conr. ave A.N.S. Phil. 7. p. 241, t. 18. f. 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. +.—U. Californias 
PSAMMOTAA. 
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 Telline. 
P. Viotacea. Lam. 1.—Bl. t. 78.f. 2. Ovate-oblong, trans- 
versely striated, rather ventricose, violet with or without paler or 
even white rays. 17.—New Holland. Variety, with purple rays 
on a white ground (P. Serotina. Lam.5.—P. Viout. Sow. Gf. 
2.—Reeve. t. 53. f. 2.)—H. Indies. 
P. Zonauis. 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 striee of growth and anastomosing vertical lines. 13. 
P. Pentiucipa. 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. 14. 
P. Canpipa. Lam. 6.—Grif. Cuv. t.12. f.10. Oval-oblong, 
thin, pellucid ; with some radiating longitudinal and very fine trans- 
verse strize ; the anterior side very short and angular ; the cardinal 
tooth of each valve cleft. 2,—Nemw Holland. 
P. TarentTinaA. Lam. 7.—Del. t. 5. f. 11. Roundish-ovate, 
sub-depressed, rounded and shorter on the posterior side, whitish, 
decussated by fine arched transverse and extremely fine vertical striee: 
beaks yellow. 1.—Mediterranean.—Much resembling Tellina 
Solidula. 
P. Donactna. 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 strize: inside rich 
yellow. $.—Hurope? 
P. Rosra.—Soren R.—Gmel. 3227.—D. p. 66.—Ch. f. 55.— 
W. t. 3. f. 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. 


1See too the P. Laskey of Turton, (Tetuina L. Mont. t. 28. 
f. 3.—W. t. 4. f. 65.), which we have copied. 
