214 
FASCICULI MALATENSES 
The Sarasins in their well-known work on the land mollusca of the Celebes 
state that they did not meet with material such as described by Simroth, viz., 
fragments of fungi and flesh, ‘ substances which in the case of a robber slug 
like Atopos we should be very surprised to find.’ In spite of this statement 1 
think Dr. Simroth is correct as to the nature of the food. In A, sarasini^ 
Cllge., I had no difficulty in making out the contents, or In the above 
mentioned specimen of A. maximus. 
Our knowledge of the habits of this interesting genus are peculiarly 
meagre. From the nature of the teeth of the radula one might suppose that 
the members of the genus lived, like the Testacellidae, beneath the surface, 
frequenting the burrows of earthworms, but from the preponderance of vegetable 
matter in the contents of the mid-gut gland, and from the fact that they have, 
I believe in all cases, been found among decaying vegetable matter, it would 
seem to point to the fact that they do not live beneath the surface to the same 
extent, If at all. 
The Generative Organs (PI. XIII, figs. 21, 22). 
In general form the generative organs resemble those of A. sarasini^ 
Cllge., the female organs I was able to trace in some detail, but those of the 
male still remain a puzzle. Commencing as a simple wide tube the vagina 
receives, at its distal end, the duct of the receptaculum seminis, which latter 
body is a small spherical sac. Beyond this point the lumen of the tube widens 
and the wall thickens, here being thrown into a U-shaped fold, continuing as 
a much narrower tube it suddenly becomes thrown into a series of closely 
packed coils, which are partly imbedded in the large albumen gland. Passing 
from the end of the common duct is a short, fairly wide tube, which is con- 
nected with a large glandular body ; clearly the homologue of the much smaller 
gland, which in A. sarasini I have termed the ovary. The penis is very like 
that In A. sarasini only longer and slightly different externally. The duct lies 
quite close to the wall of the sheath of the penis. I succeeded in tracing it 
to about the lower third of the right Simroth gland, where it seemed to 
terminate on the wall. Both the Simroth glands were well developed and 
exhibit the usual characters. 
The Pedal Gland (PI. XI H, fig. 23). 
This is a large muscular looking organ, measuring 43 mm. in length, and 
3 mm. in breadth anteriorly, and 5 mm. posteriorly. 
‘ The Patani Malays confuse the slugs of this genus with the two species 
of Eoperipatus that were found in the Siamese Malay States by the “Skeat” 
Expedition, calling both ulat chalawa^ though certain of the slugs are also 
