7 
ones. Interiør of the valves crimson; anterior valve with 16 slits, 
posterior one with 12, median valves with 4 or 5; teeth solid, 
propped outside, eaves porous, sutural plates united, sinus shallow, 
broad. — Giil cordon extending from the anterior corners of the 
foot to near the foot end. 
Locality: Campbell Island, 45, 2 sps., max. 1. 13, br. 8.5 mm. 
Fig. 1. Callochiton inorlenseni Fig. 2. Right half of an intermediate 
11 . sp X 4. valve of Callochiton inortenseni 
n. sp. X 10. 
Compared with C. steinenii from South Georgia, which has a 
similar colour, the present species shows much smaller and denser 
girdle-scales, as well as completely smooth, not granulose, and di- 
stinctly microscopically striated valves; in the latter respect it differs 
also from C. platessa, in which a tendency to granulation of the 
lateral and central areas appears. The number of slits of the 
intermediate valves (in C. steinenii 2, in C. platessa 3) is another 
point of distinction. 
Callochiton sulculatus Suter. 
North Island: 11a, 1 sp., 1. 10. — Colour coralline red, lateral 
areas white clouded; 6th and 7th valve of a whitish colour (except 
the red apices) which occupies also the adjacent part of the girdle. 
In its sculpture the present specimen shows the peculiarity of having 
the sulci of the lateral areas most distinet on plate 6 and 7, 2 and 1. 
