954 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 
in the middle near the right side, renal opening in the anterior angle, 
both orifices of a lighter colour. Anus below and a little in front of 
the respiratory orifice, near the foot margin. Foot with lateral grooves 
of yellowish-white colour; sole broad, smooth, with a lighter median 
XII. XIV. XVII. 

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fr ef ecto , > 
i ; 
h i hd 
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XIII. XV, XVI. 
Athoracophorus Dendyi, n.sp. 
XII. The animal; spirit specimen: nat. size. XIII. Transverse section of body. 
XIV. Genitalia: nat. size. XV. Genitalia, anterior portion magnified. 
XVI. Central tooth of radula, x 720. XVII. Sixth lateral tooth of 
radula, x 720. 
[For lettering, see ante, p. 250. ] 
band. Distinct grooves between sole and back, showing distinctly the 
continuance of the dorsal oblique grooves. A. thread-like line runs 
the whole length between sole and lateral groove. (Spirit specimen.) 
The dimensions of a good-sized example are :— 
. Length over back from head to tail, 50 mm. 
. Length of sole, 40 mm. 
. Width of back, 23 mm. 
. Breadth of sole, 11 mm. 
- Breadth of groove between sole and back, 4mm. 
. Distance of anus from right tentacle, 12 mm. 
. Distance of anus from pulmonary orifice, 9mm. 
. Distance of anus from foot margin, 2°5 mm. 
. Distance of pulmonary orifice from head, 18 mm. 
The reproductive organs (Figs. XIV, XV), which open close behind 
the right tentacle, are very much on the same plan as those of A. papil- 
latus, but the following characters may be considered as of specific 
distinction. The free and rather large cylindrical oviduct is greatly 
dilated, and has the receptaculum seminis inserted at its posterior part. 
The penis is about the same shape as in A. papillatus, but somewhat 
longer and distally convolute. The hermaphrodite gland is larger and 
its duct longer than in 4. papillatus. The interior wall of the penis 
is densely covered with oval papille, which sometimes terminate in 
a small sharp point. 
The digestive system does not show any marked difference from that 
of A. papillatus; there is no diverticulum on the crop, and the jaw 1s 
COOnnNOD aR COW 
eS OE ———— 
