40 
Localities: Auckland Island: 41 (Masked Island), 1 shell, h. 8. 
— 42, 1 living and 3 dead sps. (h. 13.5, dead, 12.4 living). — 
43, 2 living and 3 dead sps. 
In general appearance this species comes nearest to T. pusillus 
Sut er, which is, however, much smaller and has fewer costae and 
cords. Compared with T. aucklandicus, with which it shares the 
smooth protoconch (consisting, however, of 1 whorl in T. auck- 
landicus) the new species has a more distinet and elaborate sculp- 
ture, a longer canal, more convex whorls and a whitish (not dark- 
brown) colour. 
The radula (text-fig. 5) has a similar shape as in T. aucklandicus 
figured by Sut er (1915, pi. 19, fig. 4); its breadth is 0.06 mm. 
Fam. Thaisidae. 
Haustrum (Thais) haustrum (Martyn). 
North Island: 15, 1 sp., h. 38. — 19, 10 sps., h. 50. 
Neothais succineta (Martyn). 
North Island: 17, 6 sps., h. 45. — 19, 1 sp., h. 41. — 28, 
3 sps., h. 33. 
Neothais lacunosa Bruguiére (fstriata Martyn). 
North Island: 14, 1 sp., h. 21. — Auckland Island: 37, 3 sps., 
h. 38. — 41, (Masked Island), 10 sps., h. 28. — South Island: 
30, 1 sp., h. 24. — Stewart Island: 31, many sps., h. 35. — 
Campbell Island: 44, 1 sp., h. 35. 
Lepsiella (Thais) scobina (Quoy & Gaimard). 
North Island: 12, 4 sps., h. 20. — 14, 4 sps., h. 15 (var. al- 
bomarginata Deshayes). — 15, 1 sp., h. 23.5. — 17, 1 sp., h. 
15. — 19, 3 sps., h. 22. — South Island: 30, 12 sps., h. 17. — 
Stewart Island: 36, 1 sp., h. 16. — Auckland Island: 40, 1 sp., 
h. 15. 
