Fusus. 431 



F. TuRTONi, Bean. 



Oblong-subfusiforni, more produced above than below, simply 

 and flatly costellated ; nucleus large ; mouth rather shorter than 

 the spire; outer lip dilated ; a siphonal ridge. 



Plate CV, f. 3, 4, and CVI. f. 2, 3, 4. 



Fusus Turtoni, Bean, Mag. Nat. Hist. vol. vii. p. 493, f. 61. — Brit. Marine 

 Conch, p. 208.— Brown, Illust. Conch. G. B. p. 8, pi. 7. f. 1. 

 — King, Ann. Nat, Hist. vol. xviii. p. 245. — Howse, Ann. 

 Nat, Hist. vol. xix. p. 163, pi, 10, f. 6 to 10. — Reeve, 

 Conch. Icon, vol. iv. Fusus, pi. 20, f. 83. 



This rare and elegantly-formed species bears more resem- 

 blance to the Buccinum undatum than to its own congeners. 

 It is of a somewhat fusiform shape, that is produced above, 

 and abbreviated below, and beneath a transparent yellowish 

 horn-coloured epidermis is of a rather dull and squalid 

 white, that is apt to become liver-coloured toward the 

 apex. The principal whorls are encircled throughout with 

 somewhat depressed broadish cords, which grow fainter 

 posteriorly ; these are more or less interrupted by coarse 

 wrinkles of increase, but there is not the slightest appear- 

 ance of any longitudinal folds. A blunt-topped triple- 

 coiled apical nucleus terminates the spire, which comprises, 

 in addition, four or five other volutions, which are of mode- 

 rate height, tolerably fast longitudinal increase, more or 

 less ventricose in and beneath the middle, and more flatly 

 shelving and clearly tapering towards the broadish suture, 

 which latter is moderately slanting and strongly impressed. 

 About one- half of the dorsal length is filled by the body, 

 which is ventricose in the middle, subretuse above (more 

 especially when that part is bounded anteriorly by a riblet 

 that is more projecting than the rest), and of gradual and 

 not much rounded basal declination ; it tapers rather quickly 



