TRIBE PECT1N1DES. 291 



S. Regius. Lin. Sys.—Ch. l,f. 471.— Lam. 9.—W. t. 9, Sp.f. 2. 

 — Sow. Th. I, j). 424, t. 87,/. 30. Regular, oval, scarcely attached, 

 reddish brown (more rarely of an uniform white) between the ribs 

 and upon the points of the spines : with about 6 principal ribs, each 

 armed with 5 or 6 long straight spines, that are slightly flattened 

 at their termination ; their intervals adorned with numerous sharply 

 imbricated smooth costellae : cardinal area small. 4. Sooloo Isles. 



S. Coccineus. Sow. (as of Lam. 11) Th. 1, p. 430, Sp.f. 24, 47. 

 Purple, radiatingly variegated with red near the umbones ; with 

 numerous subequal scarcely elevated ribs, that are armed with 

 crowded unequal short strong spines. 2. W. Indies ? 



S. Crassisquama. Lam. 12. — Chenu, 11. C. Spond. t. 11./. 3. — 

 S. Pictorum, Sow. (as of Ch. 7, t. 69, /. e) Th. 1 , p. 422, partly, 

 t. 86, /. 28. Large, solid, of an uniform orange or scarlet hue ; 

 rayed with extremely numerous ribs and costellae, none of which are 

 peculiarly elevated, but all thickly crowded with strong scaly spines, 

 the costellae being similarly armed with the broader ribs. 5. 

 1 China;' ' W. Columbia.' 



S. Spathuliferus. Lam. 13 (not synonyms). — Chenu, II. C. 

 Spon. t. 8, /. 1 to 4.— Sow. Th. 1, p. 421, Spon.f. 26, 6}.—(Kn. 6, 

 t. 9, /. 1 ?) Ranging in tint from saffron to crimson, seldom 

 variegated, except at the beaks, which are usually white with 

 splotches of the ground-colour; ribs depressed, differing little in 

 size, about 6 or 7 of the broader of them (separated widely by about 

 4 or 5 costellae) armed with large and rather distant elongated 

 spathulate laminae, which, when finely developed, are somewhat 

 disposed to foliation at their apices. Interstitial costellae rough 

 with squamular spines ; the surface elsewhere crowded with ex- 

 tremely small and minutely squamiferous radiating elevated striae. 

 Var. The laminae yellow or white. 2f . W. Indies. The S. Vio- 

 lascens of Lamarck (No. 21) is referred by Sowerby to this shell. 



S. Ducalis. Ch. 7, /. 477, %.—Lam. 14.— E. t. 191, /. 6.— 

 Chenu, II. C. Spon. t. 8, /. 3.— Sow . Th. 1, p. 426, t. 85,/. 16. Solid, 

 white, closely lineated with smoky chocolate colour between the ribs ; 

 rayed with tolerably numerous and moderately elevated broad costae, 

 that are closely set with more or less flexuous white laminae, which are 

 usually more or less erect, and are generally broadest at their apices ; 



1 The S. Imperialis, Chenu, II. Con. Sp. t. 26,/ 2. — Sow. Th. 1, 

 p. 424, t. 88,/. 43, 4, only differs from Regius in being more de- 

 pressed, havhig its principal spines less erect, and in exhibiting only 

 3 interstitial costellae bristling with upcurved spinelets : ribs white, 

 ground-colour brownish pink. 3. China. 



