182 Transactions. 
Hutton (1893), Matapiro ; Harris (1897), McLean’s station, Napier; Hutton 
(MS.) (1904), Ngaruroro Station and Motunau; Park (1910), MeLean's 
station, Napier; Speight (1913), Motunau; Suter (1921), Shrimpton's, 
Ngaruroro River; Marshall and Murdoch (1920), Nukumaru, Wanganui 
district. 
Most of these refer to the same place. ^ Shrimpton's " was a station 
on the Kikowhero Creek, which is a tributary coming in on the north side 
of the Ngaruroro River, and forming the eastern boundary of the Matapiro 
Plain. MeLean's was a station on the south side of the Ngaruroro River, 
opposite Shrimpton's. (Rep. Geol. Explor., x, xii, xviii.) 
The statement that this species is “found also in the Pareora system " 
refers, no doubt, to the specimen recorded from Motunau. I have not 
seen the specimen, so cannot confirm the identification. In any case, the 
Motunau beds are now recognized as belonging to a much higher horizon 
than the Pareora. The Blue Clays of the Ngaruroro River, the type 
locality of this fossil, are equivalent to the Nukumaru stage of the Wanga- 
nuian, so the record of S. frazeri by Marshall and Murdoch from Nukumaru 
is most interesting. Unfortunately, the specimen was broken to pieces in 
transmission from Mr. Suter. 
The identification of S. frazeri in the Wangaloa beds (Marshall, 1917, 
p. 451) is surely a mistake. 
Four excellent specimens were collected by Dr. Uttley and the writer 
in a sandy pocket of the clays not far below the Scinde Island’ limestone at 
Maraekakaho, Ngaruroro River. 
, 
Struthiolaria sp. Zittel. 
1864. Struthiolaria sp. Zittel, Reise der ** Novara," Geol. Theil 1 Band, 2 Abt., 
Palaontologie von Neu Seeland, p. 35, pl. xv, fig. 3. 
In the Geological Survey collection from locality 126, Awatere Valley, 
are fragments which should probably be placed here; but their condition 
is no better than Zittel's material, so no good purpose would be served by 
attempting specific description. 
A similar shell, but with sharper spines, occurs at Kaawa Creek, but 
here again only fragments are available. In both cases there is a strong 
callus on the inner lip, recalling that of S. spinosa, but the spire is flatter 
than in the Pareora shell, and the keel is weaker. 
(b.) Struthiolaria callosa Group. 
Struthiolaria callosa n. sp. (Plate 14, figs. 7, 8, 9.) 
Shell large, ovate, with gradate spire, about same height as aperture; 
whorls five, angled about middle with wide slightly-inclined shoulder, 
body-whorl bicarinate ; sculpture, fine regular spiral threads on upper 
whorls, becoming obsolete on lower, the shoulder-angle furnished with about 
8 distant strong tubercles, lower keel also has tubercles but smaller and 
more numerous; suture slightly undulating, filled with layer of enamel 
which towards aperture reaches to tubercles above; aperture inclined, 
ovate; outer lip reflexed, moderately thickened, wedge-shaped, sinuous, 
projecting slightly at shoulder but more so at lower keel, bent then in wide 
inus to anterior canal; columella concave, bent to right below 
and ending in rounded beak; inner lip with enormous callus-pad reaching 
suture above, ending below about middle of base with rounded knob which 
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