252 TESTACEOUS MOLLUSCA. 
P. Carnea Gmel. 3365.—D. p. 326. partly—W., t. 12. f. 6.— 
P. Firasetitum var. Lam. 2.—Kn. 2. t. 23. f. 1.—Schrot. 3. t. 9. 
f.7. Subtriangular, not rounded at the margin, reddish rust or 
flesh coloured, with longitudinal nearly or quite unarmed ribs, and 
the sides nearly straight. 
P. Ricwwa Dilw. p. 327.—W. t. 12. f. 7.—E. t=. 199. fi 4.— 
P. Semrnupa. Lam. 3.—Knorr. 2. t. 26. f. 1.—Seba. 3.t. 91. f. 3 
—P. Nosius. Ch. f. 775. Greyish-fulvous, rather short, about ten 
or twelve rows of narrow distant strongly raised radiating sulci 
armed with numerous semitubular narrow scales: ventral side de- 
void of sulci and scales, the edge incurved near the beaks then 
swelling out and running nearly in a straight direction to the broad 
anterior base, which is but little rounded at either extremity ;fdorsal 
or hinge margin the shorter, but elongated and incurved. 6 Cu- 
racoa, 
C. Aneustana. Lam. 4. Narrow, wedge-shaped, horn co- 
loured, the dorsal margin larger than the posterior: radiating sulci 
fine and only armed with white vaulted scales towards the margin, 
where the shell becomes brownish. Mediterranean. 
P. Nosiris. Lin. 1160.—Lin. Mus. Ulr. 144.—Ch. f. 776.— 
E. t. 200. f. 1.—Lam. 5. var.—D. p. 327.—W. t. 12. f. 8.—P. 
Mouricata. Poli. (not Lin, nor Lam.) t. 34. f. 1.—Phil. p. 75. 
Elongated triangular, greyish orange, entirely covered with nume- 
rous radiating raised sulci, which become obsolete near the broader 
end, and are armed with crowded thin semitubvlar scales which be- 
come erect as they recede from the beaks, and finally recurved: hinge 
margin incurved, very long, angulated at its base, the anterior basal 
line running obliquely but with more or less convexity to meet the 
rounded extremity of the ventral edge, the latter nearly straight. 
12. Mediterranean. 
P. Sevamosa Gmel 3365.—Lam. 6,—D. p. 829.—W. t. 13. f. 
13.—List.t. 374. f. 215.—Ch. 787. and (young) f. 784.—E. t. 200 
f. 2.—Very large, elongated, reddish salmon coloured, very ventri- 
cose inthe middle, with obsolete radiating sulci but never ribbed, 
when perfect covered at the extremity with crowded concentric rows 
of very fragile slightly raised scalloped imbricated scales, but the 
shell usually (except when young or at the last layers of growth) 
has the surface nearly worn smooth, preserving the vestiges of its 
former scales by the scalloped concentric subimbricated lines; 
hinge margin incurved and (in the adult) much shorter than the 
convex posterior ventral ; anterior ventral base rounded at both 
sides. Upto 2 feet. Australia. 
P. Mareinata. Lam. 7.—Phil. p. 75.—P. Buttata. Gmel. 
3367.—W. t. 13. f. 20.— Gualt. t. 79. f. C. Thin, fragile, pellucid, 
whitish, longitudinally sulcated, and armed at the furthest extremity 
from the beaks with four transverse rows of spines. 53.—#. 
Indies. 
