OO EE O_O 
SUTER: NEW ZEALAND ATHORACOPHORID™. 251 
The reproductive organs are distinguished from those of the two 
foregoing species as follows:—The penis (Fig. IIL) is about as long as 
in A. bitentaculata ; its anterior portion is rather wide, but at about the 
middle it suddenly contracts, the slender second half being convolute 
with the retractor muscle. The size of the hermaphrodite eland 
which is about twice that of those in the other two species, is especially 
noteworthy. The interior wall of the penis is covered with thorn- 
shaped papilla (Figs. 1V, V), very much like those described and figured 
by Bergh from Zriboniophorus Schuettei* I found similar papillee 
present in the penis of Athoracophorus bitentaculatus. 
Radula.—The rhachidian tooth (Fig. VI) is unsymmetrical, pointed 
in front, with six, sometimes seven, cusps, of which the median is the 
largest. The lateral teeth (Fig. VII) have eight cusps, the inner one 
being the largest. There is a considerable difference between the 
dentition of this species and that of 4. bitentaculatus, the figures of 
two teeth (Figs. I, IL) being given here for comparison. The jaw 
(Fig. VIII) is much the same as in the two species already enumerated, 
and there seems to be no chance of relying on it as a means for distin- 
guishing the species, as often may be done in Swccinea. 
The digestive system (Fig. LX.) does not differ much from that of the 
two other species. The crop is wide and long, extending to the liver, 
with no trace of a diverticulum; the stomach lies between the folds of 
the liver and the intestine, and forms a long anterior loop, returning 
to the liver, whence the rectum emerges. | 
Hab.—Pelorus Valley, Marlborough, South Island. 
Sect. II. psrupANEITEA, Cockerell. 
Cockerell, Proc. Zool. Soc., 1891, p. 217. 
“Small slugs of New Zealand and the Auckland Is., resembling 
Athoracophorus, but showing a decided tendency towards the formation 
of a mantle-area like that of Aneitea. The Janella papillata of 
Hutton may be taken as the type.’’— Cockerell. 
These slugs are not always small. Back usually finely granulate 
with larger raised tubercles or papillae between the oblique grooves. 
Mantle-area distinct, triangular or quandrangular, enclosing the 
respiratory orifice. Anus below the latter and near the foot margin. 
4, ATHORACOPHORUS PAPILLATUS (Hutton). 
Janella papillata, Hutton: Trans. New Zealand Inst., vol. xi (1879), 
p. 382. 
Athoracophorus verrucosus, Mts.: Simroth, Nova Acta Acad. Ces. 
Leop. Carol., Bd. liv, p. 77, pl. iv, figs. 11-14. 
For further references see Journ. de Conch., vol. xli, p. 239. 
After carefully comparing Dr. Simroth’s description and figures 
with my specimens, I am convinced that A. verrucosus 1s identical with 

' Verhand, k. k. zool. bot. Ges. Wien, Bd. xx (1870), p. $53, pl. xiii, figs. 2-9. 
