TRIBE PECTINIDES. 289 
P. Pururprrnarum. Hanley, in Sow. Th. 1, p. 436, t. 90, f. 9,11, 
13, 14. Solid, lineated with red or black on a white ground. Folds 
large, numerous, rarely forked, angular; somewhat imbricated at the 
angles. Var. Devoid of ridges. 2. Philippines. 
P. Dusia. Hanley, in Sow. Th. 1, p. 437, t. 91, f.19. Thin, folia- 
ceous, depressed, roundish, pinkish brown, with a few scattered brown 
spots; armed with radiating rows of occasionally upturned vaulted 
scales ; folds short, irregular, interrupted. 14. Philippines. 
SPONDYLUS. 
Inequivalve, attached, auriculated, irregularly foliaceous, longi- 
tudinally ribbed, generally spinous. Beak of the lower valve usually 
produced ; its flat triangular hinge-area cleft by a linear furrow, in 
which are imbedded the remains of the earlier cartilage; the latter is 
internal, and seated in a pit between the massive teeth of each valve. 
8S. Gaprrorvs, Lin. 1136 (partly).—Lam. 1—Ch. 7, f.459; & 9, 
f. 984, 5.—E. t. 190, f. 1—Phil. Sic. 1, p. 81.—Chenu, Il. C. 
Spond. t. 2.—Sow. Th. 1, p. 418, t. 87, f. 29; pl. 88, f. 41.—(Kn. 5, 
t. 13, f. 1)—Var. 8. Acuteatus, Phil. Sic. Purplish crimson, more 
rarely white, with only the beaks and margin tinged with that colour, 
Radiating costelle numerous, little elevated, close-set, of moderate 
breadth, usually alternately larger and smaller (yet none peculiarly 
large or prominent), thickly set with very strong lingulate spines of 
moderate length; their intervals not excavated or concave, but 
roughened, by about 5 very narrow and most minutely squami- 
ferous elevated radiating limes. 4. Mediterranean. 
S. Americanus.—S. Gaprropus, Ch. 7, f. 465 (named S. Domint- 
cENsIs by Bolten)—W. t. 9, f. 1—S. G. var. D. p. 209.—S, A. 
Lam, 2.—E. t. 195, f. 1, 2.—Sow. Conch. Man. Front.—Reeve, C.S. 
t. 116, f. 1—Chenu, Il. C. Spond. t.53; t. 3, f. 31—Sow. Th. 1, 
p. 418, t. 88, f.42; t. 89, f. 64.— Young, S. ARAcHNorpEvs, Lam. 3. 
—(Kn. 5, t. 9, f. 1). Large; both general surface and raised pro- 
cesses scarlet near the beaks, and white towards the margin; rayed 
with very numerous rather depressed narrow ribs and costell, of 
which about the 6 principal are armed with close-set very elongated 
spathulate laminz, which only in finely developed specimens haye 
a slight tendency to foliation at their apices, The costelle are 
aculeated with flat slender spines, several rows of which mtervene 
between the lamine. 6. America, The S, Avicutartis of Lamarck 
(No. 10), his S. Lonersprna (No. 8), and the S. StRriato-sprnosus of 
Chenu (Il. Con. Sp. t. 23, f. 1) are, in all probability, varieties of this 
shell. 
U 
