MANGELU. 479 



part a pale band revolves above the middle of the body- 

 whorl, and is continued below the middle of the smaller 

 volutions, whose two edges are both tinged with the 

 darker hue ; a second pallid zone, likewise, is occasionally 

 present towards the anterior extremity of the shell : some- 

 times the whiteness is confined to the central portion of 

 the ribs alone. These last are less prominent and less 

 flexuous than in the first variety, and often become 

 partially obsolete on the lower half of the body-whorl. 

 The base of the pillar has often a livid or chocolate cast.* 



The animal is of a general white or yellowish- white hue, 

 speckled with flaky yellowish dots. The tentacula are 

 rather short, clavate at their tips, thickened by the con- 

 nate eye-pedicles for nearly two-thirds of their lengths, 

 with the part on which the eyes are borne rather promi- 

 nent and bulging. Their bases diverge at an obtuse 

 angle. The foot is truncate, and subauriculated in front, 

 obtuse and emarginate behind. The siphonal tube had 

 often, in the examples we have examined, a very dark 

 margin. There is no trace of an operculum. We have 

 observed considerable variations in the soft parts of this 



* Montagu's specimen of his obscure M. proximus (Test. Brit. Suppl. p. 118, 

 pi. 30, f. 8, from which Turt. Conch. Diction, p. 93; Dillw. Recent Shells, 

 vol. ii. p. 744; Wood, Index Testae, pi. 27, f. 31 ; Fusus proximus, Fleming, 

 Brit. Anim. p. 349 ; Brit. Marine Conch, p. 202 ; Brown, Illust. Conch. G. B. 

 p. 7, pi. 5, f. 34) is only the young of this species. His observation, that tlie lip 

 is remarkably broad and reflected, is not, however, applicable to this species. The 

 description is very brief, and runs as follows : — 



" Shell thick, white, with six strongly costated spires ; apex moderately 

 pointed : aperture ovate oblong ; outer lip remarkably broad, and reflexed ; the 

 canal short and remarkably spreading at the end. Length nearly half an inch. 

 Found by Mr. Laskey on Tyningham sands, near Dunbar, and is extremely 

 rare." 



Montagu further remarks, that it looks very like cosiatus, but has eleven narrow 

 ribs on the body-whorl. Of our British shells the M. striolata, perhaps, ap- 

 proaches the nearest to these characters, but we suspect that Montagu drew up 

 this description from a foreign shell. 



