SCAPHANDER. 537 



— Reeve, Conch. S^'st. vol. ii. pi. 153, f. .5. — Cuvier, Regne 

 Anim. (ed. Croch.) Moll. pi. 36, f. 3. — Wood, Crag Moll, 

 vol. i. p. 173, pi. 21, f. 8. 



Bulla ohlonrja, ^c. Martini, Conch. Cab. vol. i. p. 283, pi. 21, f. 194, 195. 



Bullcea Kgnaria, Gray, Annals Philos. 1 825, p. 408, 



Bulla {Scaphajtder) liffnarius, A. Adams, Sow. Thesaur. Conch, vol. ii. p. 574, 



pi. 121, f. 47. 



The name of this early-observed species is derived from 

 the peculiarity of its colouring, which bears some likeness 

 to the parallel fibres of a pale tinted wood. The shell has 

 a narrow ovate-oblong figure, being taper and much con- 

 tracted above, and dilated below ; it is loosely coiled, and 

 rather depressed ; but the lower medial surface is mode- 

 rately ventricose and well rounded ; the area above it is 

 almost imperceptibly and diffusely retuse. It is moderately 

 strong, not pellucid, and of a rather pale orange tawny hue 

 (rendered more intense by the glossy epidermidal skin), 

 and is spirally adorned throughout by white or pallid 

 deeply and rather broadly incised striae, that are rather 

 remote upon the whole, but set at irregular distances, the 

 intervals being shorter towards the two extremities ; these 

 lines exhibit a somewhat dotted appearance beneath the 

 lens ; sometimes, too, the wrinkles of growth are strongly 

 marked. There is no vestige of a spire, for the crown is 

 obliquely truncated, and is indented, though not umbilicated. 

 The aperture is capacious, filling more than half the ventral 

 area ; it is of a porcelain white, and dev^oid of sculpture ; 

 it occupies the full length of the shell, and is of a curved 

 and produced pear-shape, being narrow and somewhat 

 square-topped above, broadly yet not bluntly rounded and 

 greatly expanded below. The acute edge of the outer lip, 

 which rises iu a straightish or slightly retuse line a little 

 above the level of the crown (which latter is encircled by 

 a narrow fillet of white) inclines a little inward above, 



VOL. HI. 3 z 



