352 MOLLUSCA. MURICIDiE. Fdsus. 



Murex Bamf. Don. Brit. Shells, t. clxix. f. i. Mmt. Test. Brit. Sup. 



117 Sandy bays. 



Length about f ths of an inch, breadth upwards of |th ; white, or rufous ; 

 whorls rounded, with numerous transverse plaits, which, in young shells, are 

 raised and sharp, especially at the separating line ; in some cases there are 

 indistinct spiral ridges ; outer lip rounded, inner lip concave ; base attenuat- 

 ed ; canal slightly turned to the left. 



EXTINCT SPECIES. 



1 . F. longcevus. — Ventricose, smooth, spire turrited, with a few large knobs 

 upon the upper part of the latter whorls ; beak as long as the spire, slightly 

 curved near the end — (Murex longaevus, Brander, f. 40, 70. and 93.) Sower. 

 Min. Conch, t. Ixiii — In London Clay. 



2. F. Ufasciatus Elongated, rugosely reticulated ; whorls keel-formed ; 



base produced Sower. Min. Conch, t. ccxxviii — In London Clay. 



3. F. acuminatus. — Elongated, acicular, obscurely costated, and longitudi- 

 nally striated ; whorls tumid, with eight or ten elevated striae — (jNIurex por- 

 rectus, Brander, f. 86.) Sower. Min. Conch, t. cclxxiv. f. 1, 2, 3 — London 

 Clay. 



4. F. asper. — Elongated, costated ; whorls tumid ; costae decussated by 

 four or five elevated, rather acutely knotted, striae or ridges. — Sower. INIin. 

 Conch, t. cclxxiv. f. 4-7- — London Clay. 



5. F porrectus. — Elongated, subcancellated, with many prominent costae ; 

 volutions tumid, with about eight elevated striae upon each — (M. porrectus, 

 Brander, f. 35.) Sower. Min. Conch, t. cclxxiv. f. 8, 9.— London Clay. 



6. F. lulhiformis Ovate, ventricose, nearly smooth ; spire mucronated ; 



beak obscurely striated, j gently curved. — (Murex bulbus, f. 54. and ]M. Py- 

 rus, f. 52, 53. Brander.^ Sower. Min. Conch, t. ccxci. f. 1-6 — London Clay. 



7. Y.ficulneus. — Ovato-fusiform, turgid, costated ; whorls subspinose above; 

 base striated ; back twisted ; pUlar uniplicated. — (INfurex herzedus, Brander, 

 f. 51.) — Sower. Min. Conch, t. ccxci. f. 7- — London Clay. 



8. F. erraras.— Oblong-ovate, conical at both ends, transversely striated; 

 whorls bicarinated ; upper carina largest. — (Strombus errans, Brander, £ 42.) 

 — Sower. Min. Conch, t. cccc— London Clay. 



9. F. regularis Rather elongated with many longitudinal undulations, 



crossed by strong elevated striae; whorls convex, the last contracted to- 

 wards the beak, open, rather slender ; aperture obovate — (M. antiquus, 

 Brander, f. 74.)— Sower. Mm. Conch, t. clxxxra. f. 2, and t. ccccxxii. f. 1 — 

 London Clay. 



10. F. complanatus Ovato-fusiform; pointed, costated, and transversely 



striated ; superior edges of the whorls elevated, and pressed upon the spire ; 

 striae contiguous ; pillar curved — Sower. Min. Conch, t. ccccxxiii, f. 2, 3. — 

 London Clay. 



11. F. Lima Ovato-fusiform, pointed, carinated; upper edges of the 



whorls elevated, and pressed upon the spire ; cai-mae many, acute, the cen- 

 tral ones decussated by small sharp costae ; lines of growth acute. — Sower. 

 Min. Conch, t. ccccxxiii. f. 4. — London Clay. 



12. Y. c(miferus. — Elongated, with many longitudinal undulations; cros- 

 sed by numerous unequal elevated striae ; whorls few, inversely conical, their 

 upper parts depressed, and nearly smooth ; beak open, rather short, aperture 

 ovate — Sower. Min. Conch, t. clxxxvii. f. l.mm.London Clay. 



