1306 
29 
VOLUTA, Linn. Delam. 
Gen. Cuar. Univalve, ovate, subventricose ; apex 
papillary; base emarginate; columella pli- 
cated, inferior plice largest and longest. 
VOLUTA luctator. 
TAB. CXV.--- Fig. 1. 
Spec. Cuar. Shell ovate-acute, crowned with tu- 
bercular spines, terminating longitudinal ribs, 
transversely striated or sulcated; whorls con- 
cave above, with a rugged edge; outer lip 
plain within; mouth oblong. 
Syn. Strombusluctator. Brand. Hant. 64. 
Voluta musicalis. Lamarck. Env. de Paris 26. 
a 
“. 
Tue spire is a short cone with rather concave sides ; one 
row of short thick spines winds up it, diminishing rapidly 
towards the apex; from the bases of these spines proceed 
undulations or ribs which extend to the beak, and are 
crossed by numerous linear sulci or plaits, deepest about 
the lower part; the whole surface above and a small 
space below the spines is free from transverse strie, but 
the whole is longitudinally striated. The last whorl is 
about three times the length of the spire, angular above 
and but slightly ventricose; its upper edge is rugged with 
obscure tubercles, and sometimes an angular depression. 
Aperture oblong, lips nearly parallel and smooth: on the 
columella are three or four plaits. 
VOL. 11, XX! 
