MOLLUSCA.—HEDLEY. 15 
A haul of the dredge in one fathom, Carnley Harbour, taken June 28th, 1912, by 
Mr. E. R. Waite yielded— 
Thoristella aucklandica Smith. 
Photinula capillacea Phil. var. minor Smith. 
Lissarca aucklandica Smith. 
Leptomya perconfusa Iredale. 
The Subantarctic Islands differ in their marine fauna from Antarctica almost as 
much as they do from such temperate zones as those of New Zealand or Tasmania. 
That Macquarie Island should have almost the warmest climate of its latitude is 
apparently effected by an extension of the Notonectian current* already reported by 
Du Petit-Thouars as far south as 45° 16’. 
Macquarie Island, the most southern land on which vegetation flourishes, was for 
the conchologist undiscovered territory when Mr. Augustus Hamilton landed there 
for a few days in 1894. He obtained a new land shell among decaying leaves, and 
remarked on the contrast between the scarlet Gaimardia and the green Ulva to which 
it was attached.} A series from his collection was submitted by Mr. Suter to Mr. i. A. 
Smith, of the British Museum, who published an account of several of them.t Mr. 
Hamilton’s excellent work, supplemented by further material which Dr. D. Colquhoun 
obtained, has served to represent the Macquarie Island fauna in Mr. Suter’s Manual 
of the New Zealand Mollusca by the following 17 species :— 
Plaxiphora superba Pilsbry. 
Acmea cantharus Reeve. 
Nacella fuegiensis Reeve. 
Nacella illuminata Gould. 
Cantharidus pruinus perobtusus Pilsbry. 
Levilitorina hamiltont Smith. 
Lavilitorina caliginosa Gould. 
Siphonaria lateralis Gould. 
Laoma hamiltom Suter. 
Athoracophorus martensi Suter. 
Philobrya meleagrina Bernard. 
Modiolarca pusilla Gould. 
Modiolarca smithi Suter. 
Modiolarca trapezina Lamarck. 
Lasea miliaris Philippi. 
Cyamium oblongum Smith. 
Saxicava arctica Linne. 
* Hedley.—Proc. Linn. Soc. N.S. Wales, xxxv., 1910, p. 9. 
+ Hamilton.—Trans. New Z. Inst. xxvii., 1894 (1895), p. 577. { Smith.—Proc. Malac. Soe. iii., 1898, pp. 20-25. 
