6 
Ischnochiton luteoroseus Sut er. 
North Island: 11a, 3 small sps. — 11b, 4 sps., 1. 6.5. — 
Auckland Island: 37a, 3 sps., 1. 7. — 42, 1 sp., 1. 8. 
Ischnochiton campbelli (Filhol) {=pavkevi Suter). 
Auckland Island: 37, 1 sp., 1. 12.5. — 40, many sps., 1. 17. 
— 41, Figure 8 Island, the coast, under stones, at low water, 1 
sp., 1. 10. — Campbell Island: 44, many sps., 1. 19. — 45, 1 sp., 
1. 13.5. 
Callochiton empleuvus (Hutton). 
Campbell Island: 45, 6 sps., 1. 9. They are probably not full- 
grown, since there are 6 — 7 pits on the sides of the lateral areas. 
Suter has not stated the number of slits in the terminal valve, 
because of the scarceness of his material. They amount to 14. 
In the anterior valve there were about 23 irregularly disposed ones. 
Miss Mestayer (1921) examined a specimen from Foveaux Strait 
and found 11 slits in the posterior valve and 14 in the anterior. 
Callochiton movtenseni n. sp. 
(Text-figs. 1, 2). 
Shell ovate, dark-brown, shining, smooth, bluntly keeled dor- 
sally, slightly convex at the lateral slopes. Anterior valve a little 
broader than the posterior one, with a few concentric growth-lines 
(in the one specimen with 4 concentric regularly distant sulci), 
otherwise smooth and showing only microscopic radiating striae 
and impressed dots which are densest towards the margin. Inter- 
mediate valves beaked, with elevated lateral areas, totally smooth 
except for lines of growth (and occasional impressed dots towards 
the margins, and furrows: 4 concentric ones in one specimen), mi- 
croscopically striated longitudinally. Posterior valve with a pre- 
median mucro; its central area separated, by means of straight 
lines, from the posterior elevated area, which has a straight or 
slightly concave slope. All valves porous, the pores appearing as 
microscopical regular dots all over the surface. Eyes in a small 
number, occupying a median ray on the lateral areas, most obvious 
in their upper parts. Girdle narrow, rusty brown, lighter at the 
margin, with close elongate scales and fringed with short acicular 
