294 TESTACEOUS MOLLUSCA. 
examples, are, on the principal rows, slightly broader at their termi- 
nation, and disposed to foliation: interstices minutely shagreened. 
Var. The lamine orange. Var. The lamine short and frondose. 
5. W. Columbia. A kind of black lineated spotting, which, in certain 
individuals, flanks the downward course of the ribs, is generally per- 
ceptible at their commencement. 
S. Crztarus. Sow. Th. 1, p. 429 (for 8. AcuLEatus, Brod. Z. P. 
1833), t. 89, f. 52. Small, very delicate and fragile; white, with a 
very few small blackish chocolate-coloured speckless adjacent to the 
beaks, whence diverge numerous moderately distant raised strie, that 
are armed with excessively slender and elongated lamellar curved 
spines. 1}. Lord Hood's I. Evidently immature; possibly the 
young of AURANTIUS. 
S. Tenurspinosus. Sow. Th. 1, p. 421, t. 87, f. 87. Small, white, 
more or less tinged with orange, and speckled with crimson at the 
beaks ; surface everywhere scabrous, crowded with radiating costelle, 
which are thickly set with peculiarly elongated slender spines and 
spinous spatule. 13. Philippines. Very closely allied to Lonat- 
TUDINALIS, but with a more delicate aculeation. 
S. Limpatus. Sow. Z. P) 1847;°Th. 1, p. 427, €. 88, f- 51. 
Large, solid, ranging from orange to purplish crimson in the same 
specimen ; radiated with numerous little elevated ribs, none of which 
are preeminently (or at regular intervals) of peculiar magnitude : 
ribs closely foliated with tolerably equal rows of broad scales; inter- 
stices shagreened; inner margin purple. 4. Persian Gulf. 
S. Cuminen. Sow. Th. 1, p. 425, t. 89, f. 62. Of an uniform 
purplish red; with about 6 rather distant and not much elevated 
ribs, which are foliated with extremely thin and flat flexuous lamine, 
whose edges are so curled as to resemble the common Fucus 
(Digitatus) of our shores. These are broader at their apices than at 
their bases, and those near the margin are remarkably elongated. 
The intervals between the ribs are filled with very numerous raised 
strize (or delicately narrow costellze), which are more or less echinated 
by most minute spines. 23. Java. The beak of the only known 
specimen of this exquisitely beautiful shell (which is about 2 inches in 
length) does not vary in colouring from the prevailing hue. 
S. Srnensis. Sow. Th. 1, p. 427, t. 87, f. 82, 3. Small, uniformly 
pale, and of a yellowish pinkish or lurid flesh-colour; surface towards 
the beaks covered with very numerous raised squamiferous strive, 
towards the margin with large more or less crowded laminz, which 
are almost always broadest and rounded at their apices and very 
seldom are elongated or disposed to palmation. These lamine, 
although arranged in radiating rows of rather unequal size, can 
scarcely be said to be seated upon ribs, the latter being so depressed 
