86 Transactions British Mycological Society. 
cannibalistic propensities and its preference for fungus food is 
very marked. 
7. Limax cinereo-niger is mainly mycophagous, its habitat 
being woods and forests where fungi abound. Stahl records that 
the food of this species was apparently solely fungi, as the 
excrementious matter was composed of partially digested 
hyphae and undigested spores (Taylor, p. 57). Prof. Buller 
(1909, p. 226) refers to the experiments by Voglino upon the 
dispersal of spores of Hymenomycetes by slugs and the con- 
clusions may be that they do not materially exert much influence 
in that direction. 
8. Limax arborum feeds exclusively on lichens. In three 
instances, however, it slightly tasted fungi (see table). I have 
kept this species for some months in captivity, when it refused 
food of any kind beyond what could be obtained from the dead 
wood in the cage. Its habitat being arboreal, it probably has 
changed its diet from fungi to lichens (see Taylor, p. 93). 
9. Milax sowerbyi is not at all partial to fungi and has only 
eaten this food under compulsion. 
10. Agriolimax agrestis, the common field slug, is exceedingly 
partial to chlorophyllaceous food, as all farmers and gardeners 
can testify, it being very destructive. Its olfactory sense for 
chlorophyll is very marked, for it quickly finds young seedling 
plants, which it greedily devours. Still, at the same time, it 
will readily devour certain fungi, earthworms and insects, and 
as a feeder is very similar in its propensities to Arion ater. Its 
habitat is variable and its food is just as varied. Taylor (p. 108) 
says that it is not usually a fungus eater, but at times feeds 
upon various kinds, both poisonous and edible, such as Amanita 
muscaria, Boletus edulis, etc. 
It is very evident, therefore, that some species have a marked 
taste for chlorophyll food although no slug actually favours it 
entirely. On the other hand, Avion subfuscus, A. intermedius, 
Limax maximus and L. cinereo-niger are decidedly mycophagous, 
but will eat chlorophyllaceous food under compulsion. Slugs in 
comparison eat very much more food than snails; obviously the 
reason being to repair the great waste from the excessive 
muscular action required in moving to and fro to cover and 
safety. It is seldom that we find a large fungus that has not 
been attacked by a slug and also it is seldom one finds more 
than one animal on the fungus, but it rarely happens as at 
5 a.m. on an October morning (22. x. 16) with the sun rising 
and light fleecy clouds in the sky, and with the sheep tracks 
showing a heavy dew, that Puff-balls, Liberty Caps and Mush- 
rooms in abundance were to be seen quite clean and not touched 
by a single slug. 
