381 
Hamburg. Magalh. Sammelreise, p. 86 ) that it is identical with Troch. 
purpurea (Lesson), the locality being the Falkland Islands, not New 
Zealand. 
From off Moko Hinau, 5 fms (30/XII. 1914) there are two 
specimens which difFer from typical dunedinensis in having 12—14 
digits on the tentacles (against 8—10 in the typical form), in the 
calcareous ring having a somewhat different form (Fig. 59.b; to 
compare with Fig. 59.c.) and in the ciliated funnels being distinctly 
smaller (Fig. 60.b to compare with Fig. 60.c). The genital organs 
are in a very imperfect stage of development; it is therefore prob- 
able that the two specimens which measure ca. 50 mm (well ex- 
tended) are not yet fully grown, and thus would appear to reach 
a larger size than the typical dunedinensis, in which the genital 
organs are fully developed already at a length of ca. 25—30 mm. 
Very probably these specimens represent another species; but 
since it is, in any case, very closely related to dunedinensis, and 
as only two specimens are at hånd, I think it the better course, 
for the present, at least, to designate this form only as a variety 
of dunedinensis, naming it var. microurna n. var. 
25. Trochodota Dendyi n. sp. 
Plimmerton; sandy beach, at low water. 15/1. 1915. 3 specimens. 
Waikeke, Auckland Harbour. 3 specimens (from Mr. W. R. B. Oliver). 
Paterson Inlet, Stewart Island. VII — IX. 1899. 3 specimens (Dr. G. M. 
Thomson). 
The specimens from Plimmerton (the type) are 7— 8.5 cm long, 
by a diameter of ca. 3—4 mm in the anterior end, the posterior 
end being somewhat narrower. The specimens from Auckland Har¬ 
bour are very much larger, the longest ca. 18 cm, although in a 
rather contracted State; diameter in the anterior end 5 mm; the 
posterior end is somewhat thicker on account of the rectum being 
full of coarse sand. Those from Stewart Island are in a very poor 
condition, strongly contracted. The specimens from Plimmerton are 
white, those from Auckland Harbour with a faint purplish tint. 
Tentacles with 6 pairs of digits, increasing in length towards 
the end of the tentacle, the distal pair being distinctly the longest. 
Mouth not in the shape of a dorsoventral slit. No distinet yellow 
