28 
further spiral ridge. Colour grayish-white. Aperture square, with 
a short canal, notched in the end. Dimensions: H. 3.9, br. 1.1 
mm. — Locality: North Island, 16, 1 empiy shell. 
This species recalls in its sculpture (especially in the existence 
of a basal riblet) C. marginata Suter, which differs, however, in 
being larger and having only 8 whorls with 2 series of gemmulae, 
as well as C. styliformis Suter, which has only 15 axial costae 
on the last whorl. 
Seila dissimilis S u t e r. 
(PI. I, fig. 18). 
Campbell Island: 45, 10 empty shells, h. 3.8, br. 1.1, whorls 
8. — Sut er has described and figured (1908) the species from 
a not full-grown specimen. I give a figure from an adult one. 
The colour is pale-brown (apex lighter), costae and canal whitish. 
To Suter’s description of the sculpture may be added that the 
basal spiral ridge appears on the 3—4 lower whorls as a weak 
thread immediately above the suture. 
Seila terebelloides (Hutton). 
North Island: 11a, 3 sps., h. 9.5. 
Fam. Triphoridae. 
Triphora infelix Webster. 
North Island: 10, 1 sp., h. 8.4. 
Triphora lutea Suter. 
North Island: 16, 2 sps., h. 3. 
Triphora trihulationis Medley. 
To this species I refer a specimen from St. 2 (10 miles olf 
Cape Maria v. Diemen, 50 fms, hard bottom). Its colour is yel- 
lowish with rusty bands. The only difference from the type, as it 
is described and figured by Medley (1909, p. 440, pi. XL, figs. 
53, 54), seems to be its nearly perpendicular canal and the almost 
simple (not beaded) upper basal riblet. The apex was broken, the 
remaining whorls were 9. Dimensions: M. 4, br. 1.2 mm. — The 
type comes from Mope Island, North Queensland. 
