154 KEW : THE FACULTY OF FOOD-FINDING IN GASTROPODS. 
means for taking shells, using meat, greased sheets of paper, boards, 
etc., as baits. Dr. Sterki has suggested that those who collect small 
shells (the small Hyadinias, Pupas, etc.) might usefully expose heads of 
sheep or other bones with open cavities as baits... Mr. Drummond, 
who was the first or one of the first to find Stexogyra goodallit in 
this country, used to obtain supplies of it from its original habitat 
by placing a few dead worms under a board on the surface of the 
tan of a pine-bed, and in this way numbers were induced to come 
together.” 
Marine gastropods, too, pi etc., often assemble in numbers 
round favourite food. As with slugs wii snails the extreme delicacy 
of their sense of smell praeis enables them to proceed towards 
it from all directions. As stated in Tryon’s Manual, the dog-whelks 
(Wassa) and sea-snails (Vatica) are able to perceive the presence of 
a decaying animal in the water from a great distance.* ‘This faculty 
in the common whelk (Buccinum undatum) is taken advantage of 
t 
According to Cérsted, great numbers of this mollusc and of the almond- 
whelk (/usus antiguus) are taken in the Kattegat in wicker baskets 
baited with dead cod-fish. The baskets are let down on a muddy 
bottom and are soon taken up half-filled with wanes.” On our own 
coasts various kinds of baited nets and baskets ly employed. 
The Grimsby whelk-fishermen, for instance, sink shallow hoa 
baited with fish-offal, in which, as Mr. Holdsworth states, ‘the 
whelks collect in large numbers, and are caught without any 
difficulty.” Another mode is to sink baskets, baited with pieces 
centre for the admission of the whelks.® Horse-flesh, also, is often 
used as a bait.?7 About Harwich trots or long-lines are employed, 
and when hauled up the snoods which are baited with shore-crabs, 
about twenty on each, are found covered with whelks.? These and 
other carnivorous molluscs are often taken in good numbers on 
long-lines baited for catching fish. Such lines, according to 
1 'V. Sterki, ‘Conchologists’ Exchange,’ i, (1887), 67. 
2 See Fleming’s ‘ British Animals,’ 1828, p. 266. 
3 G. W. Tryon, jun., ‘ Manual of # Conchlog; ii, ret 118. 
hall 
* A good many 
5 (Ersted, quoted by Jeffreys, * British Combe: iv. ns 289-290. 
* E. W. H. Holdsworth, ‘ Deep-Sea Fishing,’ 1874, p. 143, 
7 J. C. Wilcocks, ‘ The Sea-fisherman,’ ed. 3, 1875, p. 215. 
* E. W. H. Holdsworth, loc. cit., p. 142. 
scpetonicerrteer Ne 
Naturalist 
