SUTER: NEW ZEALAND ATHORACOPHORID®. 247 
Sect. I. arHoracoPHorvs, s.s. 



















1, ATHORACOPHORUS BITENTACULATUS (Quoy & Gaimard). 
Limax bitentaculatus, Quoy & Gaim.: Voy. Astrolabe, Zool. vol. ii 
(1832), p. 149; Atlas, Moll. pl. xiii, figs. 1-3. 
Janella maculata, Collinge, Proc. Zool. Soc., 1894, p- 527. 
For all other references, see Journ. de Conch., vol xli (1893), p. 234. 
Among some specimens of A thoracophorus, which I sent to Mr. Collinge 
s A. bitentaculatus, he found two differing from the rest in being much 
Jatter, of dirty yellow ground-colour and with numerous black spots 
id dashes, and these he described as a new species, Janella maculata, 
giving a good account and figures of its anatomy. There is, however, 
ot the least doubt but that the specimens I collected in the Forty 
Mile Bush, and of which I sent some to Mr. Collinge, consisted of 
A. litentaculatus and A. antipodarum, at that time considered to be 
one species. Collinge, however, has shown that the two are quite 
distinct, and herein lies the great merit of his investigation. It is 
ce | 
Vr Rey 
iy geet 


Athoracophorus bitentaculatus (Quoy & Gaim.). 
I. Central tooth of radula. II. Sixth lateral tooth of radula. 
Both x 720. 
evident that the specimens referred by him to Janella maculata are in 
act Athoracophorus bitentaculatus (Quoy & Gaim.). The authors 
istinctly mention! that their species has brown spots: ‘ La couleur 
e ce mollusque est d’un jaunatre sale tacheté de brun clair.” 
I have dissected a number of what I consider to be typical 
A. bitentaculatus, and found them to agree with Collinge’s new 
pecies. 
The mantle-area is not defined, and is bordered, in front only, by 
i lateral groove, which runs down to the anal orifice ; sometimes a fine 
me is found outside the pulmonary orifice parallel to the median 
orsal groove, but there is no posterior limitation. In front of the 
ulmonary orifice is a small triangular area of lighter colour, with the 
enal orifice, in the median dorsal groove; this was taken for the anal 
pening by Knight, and for a mucous pore by Captain Hutton. The 
utilow and distribution of the renal secretion over the whole back of 
le slug were well described by Knight.” 


1 Voy. Astrolabe, Zool. vol. 11, p. 148. 
? Trans. Linn. Soc., vol. xxul, p. 381. 
