114 Transactions. 
spines, os on upper keel of biangulate body-whorl, lower keel of 
€: a row of similar but smaller nodules. There is a tendency for 
on V WE liue below this second keel to be m рд spinose. Spiral 
above it ; ei eke concave between the two keels, dnd contracted 
and slightly convex below them. Suture wavy, indistinct. Aperture sub- 
vertical, triangulate, fasciole prominent. Outer lip thin, not callous, wit. 
only short, linear, and distant lirae. Inner lip rather strongly callous, 
spreading a little beyond columella and over parietal wall, limited by groove 
which also truncates basal spirals. : 
Height (estimated), 43 mm. ; width, 23 mm. (holotype). 
Holotype (almost perfect) and two paratypes (imperfect) from Ard- 
gowan in author's collection. 
Remarks. — Closely allied to Siphonalia nodosa acuticostata Sut., for 
which it was at first taken. Suter’s description and figure of the latter 
do not enable it to be separated from this variety at all easily, but Mr. 
Marwick assures the writer that specific differences may be noted in actual 
specimens. 8. nodosa acuticostata Sut. has stronger lirae inside the aperture 
and a more concave base; its axials carry simple angles at the periphery. 
Mr. Marwick finds this species also at White Rock River, Pareora ; while 
the author has recorded it from Dowling Bay in this paper, and has speci- 
mens from Awamoa and Target Gully. 
List oF PAPERS CITED. 
BanrRUM, J. A., 1919. А Fossiliferous Bed at Kawa Creek, Trans. N.Z. Inst., vol. 51. 
рр. 
Bram, W. N., 1879. Building Materials of Otago, pp. 103, 110, 112, 115 
Graner, L. L, 1921. An Account of the Geology of the Green Island Coalfield, Trans. 
. Inst., vol. 53, pp. 156-74. 
MARSHALL, P., 1914. Quart. Jour. Geol. Soc., Dec., 191 
—— 1916. The Younger Limestones of New Zealand, Trans. N.Z. Inst, vol. 48, 
pP. 
— е The Wangalia Beds, Trans. N.Z. Inst., vol. 49, pp. 450-60. 
1919. = of the Hampden tone and Classification of the Oamaru System, 
ns. N.Z. Inst., vol. 51, pp. 226— 
Мазан, 1 T. ети a RDOCH, е 1920. Tertiary Rocks near Wanganui, Trans. N. 7. 
nst., vol. 52, pp. 11 
Moreay, z^ à 1919. The Уен Ў and Phosphate Deposits of New Zealand, pt. 1, 
Park, J., 1904. On the Geology of the North Head, dicun and its A" to 
the Geological ч of Dunedin, Trans. N.Z. I vol. 36, pp. 
—— 1918. The Geology of the Oamaru District, N.Z. Geol. ‘Bare: Balk No. 20 (n.s.). 
SPEIGHT, R., 1917. qe e Stratigraphy of the Tertiary Beds of the Trelissick or Castle 
rans. N.Z vol. 49, —b56. 
"THOMSON, J. A., 1918. On the Age of the Wakouaiti Sandstone, Trans. N.Z. Inst» 
vol. 50, pp. 196-97. 
—À 1920. The Notocene Geology of "us ШУ Waipara and Weka Pass District, 
Trans. N.Z. Inst., vol. 52, pp. 3 
Urtiey, С. H, 1920. Remarks on Bulletin. No, 20 (New n of the New Zealand 
Geo ological Survey, Trans. N.Z. Inst., vol. 52, pp. 169-8 
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