290 TESTACEOUS MOLLUSCA. 
S. Canpipus. Lam. 4.—Chenu, Il. C. Spond. t. 24, f. 4—Sow. 
Thes. Conch. 1, p. 429, t. 84, f. 8, 4, 5. Rather small, white or 
tinged with red, subfasciated at the beaks with smoke-coloured semi- 
zones; surface not ribbed; but roughened by very numerous elevated 
strie, which are subimbricated by crowded simple scales of an 
abbreviated lingulate form; interstices adorned with close-set ele- 
vated striule, which are minutely and obsoletely squamiferous. 
Var. ‘The scales larger, less numerous, and more erect; the inter- 
stices very finely striated. 23. Lord Hood's I. 
S. Fottaceus, Ch. 7, p. 85, f. 472, 3.—S. Cosratus, Lam. 6.— 
Chenu, Il. C. Spon. t. 22.—S. SpatHutiFervs, FM. t. 191, f. 7.—Reeve, 
C. 8. t.119, f. 9.—{Kn. 1, t. 9, f. 2)—S. Perrositenum, Sow. Th. 1, 
419, Spon. f. 6, 8, 9, 10, 49. Solid, in the more characteristic 
examples purplish red, with the foliations tinged with that hue, and 
the armed ribs white. Surface usually shagreened; the ribs strong 
and prominent, the 5 or 6 principal of them foliated with large, 
coarse and distant laminz, which, although only of moderate length 
and broadly palmated in the more typical specimens, appear some- 
times (in large shells chiefly) to be simply spathulate from being 
much elongated, but almost always evince a disposition to branch 
out at their apices. The unarmed interstitial coste are rarely more 
than two in number, since, upon the appearance of a third, one of 
the grooves becomes filled up near the margin with white laminze 
forming an incipient rib. Var. Of an uniform orange tint; the 
unarmed costie almost obsolete. Var. (Cosratus, Lam.). The aculea- 
tion composed of very large distant strong and elongated spines; 
the ribs subbifid. Var.? Of an uniform pink; aculeation as m the 
preceding, but the unarmed ribs narrower and squamiferous. The 
minute shagreening, which even pervades the ribs in very perfect 
examples, in the stunted palmiferous ones becomes almost obsolete. 
There are neither interstitial raised stri@ nor fine costella. 6. 
Mauritius. 
S. Vaniecatus, Ch. 7, f. 464.—Lam. 7.—Chenu, Il. C. Spon. 
t. 10, f. 1, 83.—Sow. Th. 1, p. 425, t. 85, f.14, 15. Small, solid, 
white, with very fine zigzag lines of rufeus chocolate diffused over 
the surface. Ribs, in the more typical examples, coarse, rather far 
apart, and by no means numerous; (about) the 8 principal of them 
guarded with strong and rather distant spathulate spines; the 
intermediate ones unarmed. Var. The aculeations simply spinous: 
only 4 or 5 principal ribs: colouring as in type, except that the 
surface is more or less tinged with orange near the beaks. Var. 
The aculeations elongated and simply spathulate; principal ribs 
about 5 in number; white, tinged with chocolate in the intervals of 
the ribs. 24. Amboyna. 
