186 Transactions. 
Localities.—1040, greensand below Wairarapa limestone, at Twaite’s 
cutting, five miles south of Martinborough (holotype); coast half-mile east 
of Ruamahanga River mouth, Palliser Bay (Dr. J. A. Thomson). : 
Remarks.—This shell is intermediate in appearance between S. canali- 
culaía and S. tricarinata ; itis higher in the spire than either, more slender 
than the former, with rounded ribs and wider interstices; it may be dis- 
tinguished from the latter by its 5 regular, strong, rounded ribs on body- 
whorl,.and only 4 cords on the base. 
Hutton collected this species from “east coast, Wellington," but did 
not separate it from 8. canaliculata. The figure so labelled in Hector's 
Outline must have been drawn from a specimen of S. acuminata, for it shows 
the high spire. 
Struthiolaria monilifera Suter. (Plate 13, fig. 7.) 
1873. Struthiolaria cingulata Zittel var. B Hutton, Cat. Tert. Moll., p. 11 
1886. Struthiolaria cingulata Hector, Outline of N.Z. Geol., p. 51, fig. 9, 
(not of Zittel). 7 
1914. Struthiolaria cingulata subsp. monilifera Suter, N.Z. Geol. Surv. Pal. Bull. 
No. 2, p. 18, pl. 1, fig. 10. 
As has been stated above (p. 179), S. cingulata belongs to the S. papulosa 
group, but S. monilifera has the characteristic outline, aperture, and 
typical arrangement of cinguli shown by the S. vermis group; it must 
therefore be granted at least specific distinction from S. cingulata. These 
features, together with the strong spirals on the base, show that the closest 
relationship is to S. acuminata. e mistake of coupling S. monilifera 
with S. cingulata was caused by Hutton's wrongful identification of a shell 
from Patea as the latter species. This shell, also an undoubted member 
of the vermis group, was Hutton's plesiotype of 8. cingulata, and was 
figured by Suter (1914). It is here described and named as a new species, 
S. rugosa (see p. 189). i 
No good specimens of S. cingulata were available for the figure of this 
species in Hector's Outline, so one was drawn from Hutton's variety 
i.e., S. monilifera. 
"No. 17 
Struthiolaria tricarinata Lesson. (Plate 15, figs. 6, 7.) 
1830. Struthiolaria tricarinata Lesson, Ann. Sci. Nat., ser. 2, vol. 16, p. 256. 
1880. Struthiolaria vermis tricarinata Lesson: Hutton, Man. N.Z. Moll., p. 68. 
1913. Struthiolaria vermis tricarinata Lesson: Suter, Man. N.Z. Moll., p. 276. 
The strong spiral cinguli of this shell show that it is a more primitive 
form than S. vermis, and on that account it is deemed advisable to grant 
it full specific recognition. No doubt intermediate forms occur, but the 
extremes are well separated. 
On the base are about 7 fine spiral lines, showing an advance from 
S. acuminata, which has only 4 strong cords. 
e specimen here figured is in the Dominion Museum collection, and 
comes from Farewell Spit, Nelson. 
Fossil Locality.—Languard Bluff, Wanganui (R. Murdoch). 
Suter (1913) wrongly quotes in his synonymy of S. tricarinata Gray’s 
record of S. scutulata Martyn, in Dieffenbach's New Zealand. Gray merely 
lists S. scutulata as recorded from New Zealand by Martyn, the author of 
the species. The mistake originated in Martyn's statement that B. seutu- 
latum was a New Zealand shell. In the same synonymy (Suter, 1913) 
Hutton’s use of S. scutulata as of Deshayes is given as.being intended for 
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