154 Transactions. 
Remarks.—Tatea huonensis Ten.-Woods was stated by its author to have | 
an operculum “calcareous, with a vertical submarginal claw " (1). This 
very serious and misleading error was perpetuated by Tryon (2), but was 
f: Smi 
Zealand in 1917-18, and to whom I am greatly indebted for kindly 
assistance rendered at various times. : 
his species is not so elongate as is usual with other members of the 
genus. 
MaRaINELLA, Lamarck, 1799, Mem. Soc. N. Н. Paris, p. 70. 
Marginella cairoma n. sp. (Plate 7, figs. 4-5.) 
Colour pale cream-buff (Ridgway's colour standards) with a whitish narrow 
band above suture. On upper whorls there are ochraceous-orange bands, 
ones oblique and thicker than the upper ones. Top plait short and nearly 
transverse, the lower extending to basal margin. Inner lip thin and 
transparent. 
Diameter, 1:8 mm.; height, 4-9 mm. 
Animal unknown. 
type and paratypes in my collection, and paratypes also in the 
collection of the Australian Museum, Sydney. | 
Habitat.—Russell, Bay of: Islands (A. E. B.); near Taipa, Doubtless 
Bay (type, A. E. B.). 
Situation.—Under loose boulders embedded in sand, near low-water 
mark, 
emarks.—Three specimens were collected at Russell, and about twenty 
at Doubtless Bay, and all were alive. 
is species is allied to М. allporti Ten.-Woods, but the absence of 
tubercules in the outer lip, and its constant narrow form, separate it from 
that species, 
REFERENCES. 
1. Tux1son-Woons, J. E, 1875, Bythinia huonensis, Proc. Roy. Soc. Tasm., p. 71. 
2. Tryon, G. W., 1887. Tatea, Man ch., vol. 9, p. 323. 
- Sur, E. A., 1881. On the Fresh-water Shells cf Australia, Jour. Linn. Soc. Lond., 
vol. 16, No. 92, Zoology, p. 268-69. 
