nearly spherical, ami 23 mm. in diameter. Leiicli, a German, i.s 

 quoted by Jeffreys us saying that a pair of these slugs have been 

 known to lay 776 eggs. Some of them were dried eight times succes- 

 sively in a furnace and yet produced young. A number of this species 

 l)laced in captivity early in November have been active all winter, 

 although the storeroom in which I have kei)t them is often veiy cold, 

 and their eggs have continued to be deposited apparently without inter- 

 mission. As an instance of this hardiness of the moUusk, I may men- 

 tion that one morning in January when the temperature of the room 

 was 34^^ Far., or only two degrees above freezing point, I found a pair i/i 

 coitu on the under surface of the glass cover of the box. On very cold 

 days they remain contracted on the earth under a piece of basswood 

 log, while the native species kept with them — L. campestyis, under the 

 same circumstances, cling to the log itself. L. agrestis attains a length 

 of 55 mm. when fully extended, and is subject to great variation in 

 color. Flesh tints prevail in the young, but in about fifty per cent, of 

 the specimens observed they become in time replaced on the back and 

 sides by dark blotches, more or less numerous, resulting sometimes in 

 producing examples of a deep brown coloi-. The rudimentary shell 

 may be found beneath tlie posterior ])art of the mant'e. 



Limax cawpestris, Binney. — This is the si)ecies commonly met with 

 in moist places in woods or open fields or along the banks of rivers — 

 everywhere except on sandy soil. It is less than half the size of L. 

 agrestis — 27 mm. being about the average length — and is not so com- 

 mon in gardens as that species. I have found the two together only in 

 one station, near JNIcKay's Cay, New Edinburgh. At any period of 

 their growth, even when of the same size, the two species are easil}^ dis- 

 tinguishable by the usually lighter color, and greater opacity and ap- 

 parent solidity of the foreigner. The foot of the native specips also 

 presents a more marked contrast between its centre and sides. While 

 the mollusk is at rest the centre of the foot is bluish and semi-trans- 

 parent, but when it begins to move, the muscles contracting form an 

 opaque spot which advances towards the head and is quickly followed 

 by another and another, presenting the api)earance of a miniature 

 torrent rushing with great rapidity from t!ie posterior to the anterior 

 end of the foot. 



