GENERAL NOTES. 41 
beyond the apex of the galla. Labellum short, obtuse, with a 
short, undivided, and rounded basal appendage. Wing of the 
column broad, nearly square, produced downwards in a short, 
rounded lobe. 
NEW ZEALAND SYSTEMATISTS AND COLLECTORS.—A good 
deal of valuable assistance to those working at systematic 
zoology and botany can be rendered by persons who have not 
themselves sufficient time to devote to such work, but who are 
willing to undertake the task of collecting. It requires, besides, 
very slight scientific knowledge to commence the making of col- 
lections, and the acquisition of special knowledge and the taste 
for it grow by observation. Much good work has already been 
done in this direction by various members of the Dunedin 
Naturalists’ Field Club, and this is a line of usefulness which 
such clubs may well seek to follow out more fully. 
We shall therefore be glad if systematists working out any 
particular group of animals or plants, or who are willing to name 
collections for those who will forward them, will communicate 
the fact to our columns, as they may thus be enabled to obtain 
specimens from all parts of the Colony. The following gentle- 
men are desirous of obtaining specimens of the particular groups 
named, and we would ask our subscribers to aid them to the 
extent of their ability :— 
Prof. Hutton, Christchurch—Land Shells (preserved in spirit). 
Mr. F. F. Cheeseman, Auckland—Nudibranchiate Molluscs (preserved in 
spirit. Collectors are requested to note the colour, size, shape, &c., of the specimens | 
while they are still alive), 
Capt. Broun, Auckland —Coleoptera (see his article in the current number). 
Mr. Chas. Chilton, Christchurch—Crustacea. 
Mr. G, M. Thomson, Dunedin—-Lower Crustacea, Entomostraca, &c. 
We hope in future numbers to publish the names of other 
workers, and trust that members of Field Clubs and others will 
take the hint. 
—— 
RECENT PAPERS ON MOLLUSCA (By Prof. F. W. Hutton).— 
On a New Genius of Rissotne.—This paper describes a new genus, 
for which the name Dardamia is proposed, intermediate between 
Larleeia and Rzssoine, having the shell and simple opercular 
lobe of the former, combined with an operculum much like that 
of the latter. One species is described, D. oltvacea from 
Lyttelton. 
On the FHydrobiine of New Zealand—The different 
species of molluscs inhabiting the fresh and brackish waters of 
New Zealand, and belonging to this sub-family, are all shown to 
belong to the same genus Potamopyrgus. The eight species 
mentioned in Prof. Hutton’s “Manual of the New Zealand 
Mollusca,” are reduced to three—viz., P. cumingiana, P. corolla, 
and P. antipoda. A new species is also added—P. pupoides— 
from the brackish water of the Heathcote estuary. It is a very 
small species, with an oblong shell of only four whorls. The 
dentition, as well as the shells, of the different species are figured 
