70 The Shell-Collector’s Handbook. 
/ 
less, the periphery is angulated, the under side is remark- 
ably gibbous, the mouth is very large, squarish, and 
scarcely oblique; the outer lip is expanded (‘so as to make 
it trumpet-shaped ’—Gould), and the umbilicus is abruptly 
contracted, small and deep. Body dark grey, often with 
a slight orange tint, closely and minutely speckled with 
flake-white; mantle thick, lining the mouth of the shell; 
head large and tumid; mouth furnished with broad 
lobular lips; tentacles cylindrical and extensile, widely 
diverging, broad and triangular at the base. The sheath, 
or outer part, is gelatinous, and the core, or inner part, is 
of a much darker colour, and apparently greater con- 
sistence ; tips rounded; eyes sessile on the inner base of 
the tentacles; foot oblong, squarish in front and bluntly 
pointed behind; verge curved on the left hand, or um- 
bilical side of the shell.”—(Dr. Gwyn Jeffreys, Ann. and 
Mag. Nat. Hist., November, 1869.) 
Hatitat.—In the canals round Manchester. Introduced 
from America in cotton bales. 
