292 TESTACEOUS MOLLUSCA. 



about three interstitial elevated striae. Var. f S. Spatagoides, 

 Ch. 7, p. 67, /. 474, 5.— (Kn. 6, t. 9,/. 2.)— S. Croceus, E. t. 191, 

 /. 4 ? — S. Ducalis, Chenu, II. C. Spon. t. 8, /. 2. Purplish brown 

 with elongated and rather distant white laminae ; the lineation only 

 commenchig at the margin. 3. Philippines. The lineated style of 

 painting, rather than the sculpture, appears to be the permanent 

 characteristic, for the lamina, in some individuals, become almost 

 obsolete. 



S. Microlepos. Sow. (as of Lam. 16) Th. 1, p. 422, t. 88,/. 46. 

 Small, scarlet, not variegated, armed with radiating costellae and 

 several intervening minutely, imbricated raised striae ; the half dozen 

 principal riblets notched by imbricated rudimentary scales, which 

 near the margin become strap-shaped and truncated. If. China. 

 Lamarck's species, for which Knorr, vi. t. 12, /. 3, was doubtfully 

 cited, is ill-defined. 



S. Croceus. Ch. l,p. 77, t. 46, f. 463.— Lam. 17.— Sow. Th. 1, 

 p. 419, t. 87,/. 31.— (Seba, t. 88,/. 1.) Small, solid, of an uniform 

 reddish orange ; the 4 or 5 principal ribs armed with a few distant 

 strong simple spines ; their intervals roughened by more or less 

 squamiferous raised radiating striae. 2. W. Indies. 



S. Aurantius. — S. G^ederopus, &c. Ch. 7, p. 79, /. 466, 7. — 

 S. A. Lam. 18.— E. t. 191, /. 3.— Sow. G.— Reeve, C. S. t. 118.— 

 Chenu, II. C. Spon. t. 23,/. 2, 3, 4.— Sow. Th. I, p. 428, Spon.f 1, 

 2, 55. Of an uniform orange, or with the spines and margin of 

 that hue, and the ground white with chocolate-coloured spots near 

 the beaks : rayed with numerous narrow little elevated ribs (none 

 peculiarly prominent), that are armed with elongated moderately 

 distant spines : interstices smooth, slightly concave, not sculptured. 



4. Sechelle Islands. The S. Albus of Chenu (Con. II. Sp. t. 28, 

 /. 5) may possibly prove a colourless variety. 



S. Radians. Lam. 19. — Chenu, II. C. Sp)on. t. 28,/. 2, 3, 4. — 



5. Nicobaricus, Sow. (as of Ch. 7, / 469, 70) Th. l,p. 428,'*. 88, 

 /. 48. Small, white, with radiating rows of blackish chocolate-coloured 



spots ; surface bristling with most numerous radiating rows of very 

 delicate crowded spathulate spines (or elongated concave scales), which 

 are not seated upon ribs, but upon slightly elevated striae. Var. 

 Spots scarlet with dark centres : striae further apart and armed with 

 most slender lamellar spines : interstices delicately shagreened. 1£. 

 Philippines. Not improbably the young of the next species. 



S. Zonalis. Sow. (as of Lam. 20) Th. \,p. 429, Spon.f. 12, 18, 

 27, 60. Usually white, with chocolate-coloured spots near the 

 beaks, and the laminae of a lilac colour: rayed with extremely 

 numerous ribs, which are depressed, of nearly equal breadth (those 

 towards the centre being rather the larger), and most thickly set 



