KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 52. N:o I6. 91 
rounded and rather uniformly spread verrucae. On the under side three portions 
appear, the median one being the sole, and showing a close transversal rugation, the 
lateral ones being the equally broad hyponota, which are warty like the upper part 
of the body. The foot sole is shorter than the notum, becomes narrow towards both 
ends, which are rounded, and is separated all round from the hyponotum by a rather 
shallow furrow. In the latter there appear the following openings (fig. 45): in the 
foremost end close to the right of the mouth the male genital orifice; far back on 
the right side (in the first fifth of the body length) a group of openings, namely the 
female genital orifice as a small rounded pore below, above it the cloaca, or the 
joined anal and nephridial openings (a), as a lengthened slit, and lastly, just in the 
bottom of the mantle furrow, the minute inspiratory orifice (s). — The colour of the 
animal was a uniform light brown, except for the blackish, medially lighter, sole. 
Fig. 47. Radula of Atopos australis (?). X 145. 
Anatomy of Atopos australis. 
The figure 46 gives a scheme of the inner organization, which in all essential 
respects agrees with the description by SImRoTtTH 1891. The alimentary canal begins 
with a lengthened muscular pharynx without jaws, which receives on both sides the 
ducts from the triangular salivary glands. In the immediate continuation of the 
pharynx follows a cylindric radular sac (r. s.), which is exteriorly not markedly set 
off from the former. In front of the radular sac, on its upper side, a very narrow, 
thin-walled oesophagus emerges; it passes through the nervous centrum, stretches 
backwards on the right body side and opens in its median line into the spacious 
liver (!.), which extends backwards as a narrowly conical, slightly lobed, whitish gray 
sac. Close to the junction of the oesophagus with the liver emanates the intestine, 
which describes a curve towards the dorsal side between the liver and the herm- 
aphrodite gland (g.) and then leads directly to the anus. 
The radula (fig. 47) is rather narrow with only 19—22 teeth in the oblique 
rows on each side of the naked rhachis. The teeth are uniformly hook-shaped with 
one large cusp only, as in Testacella, but the outermost laterals are smaller than the 
