SLUGS. 87 
Dr. Ball observes, “I first became aware of 
this Testacella preymg on worms by putting 
some of them in spirits, when they disgorged 
more of these animals than I thought they could 
possibly have contained: each worm was cut, 
but not divided, at regular intervals. I after- 
wards caught them in the act of swallowing 
worms four and five times their own length.” 
Testacella, and the other predaceous pulmo- 
niferee (Daudebardia, Glandina, and Cylindrella), 
do not possess horny jaws. The lingual ribbon 
is very large and wide, composed of about fifty 
transverse rows, which are oblique, and descend 
towards the middle ; the teeth are conical, regu- 
SSX SQA ; Mie: is LZ 
SOW 
SS DOOLLF 
Fig. 15.—Part of the lingual ribbon of T. haliotidea. 
V el 
a 
larly curved, barbed at the point, and having a 
projection on the middle of the posterior side, 
from which the remainder thickens; the teeth 
diminish in size towards the centre; there are 
51 in each row. 
The animal, while engaged in laying its eggs, 
about ten in number, draws the head and tenta- 
cles in; the reproductive orifice is situated on 
