490 JOURNAL OF SCIENCE, 
L. lanceolata, L. procera, L. discolor, Polypodium billardieri, Aspidium 
capense, Grammitis australis, Hymenophyllum rarum, H. crispatum. 
(4) “Jungermannia reticulata,” by R. A. Bastow. 
The Superintendent and Inspector of Fisheries, Mr. Saville-Kent, 
F.L.S., F.Z.S., exhibited and made remarks upon the ova and living fry 
of the Cucumber Mutlet, Herring, or Grayling (Prototroctes marena). 
The eggs taken and artificially impregnated from fish caught in the 
Mersey, at Latrobe, were rapidly hatching out in his aquarium. A 
period of precisely three weeks had elapsed from the collection of the 
eggs and the appearance of the first fish, the “eyed” condition of the 
ova having been entered upon on the expiration of the first fortnight. 
The artificial impregnation or collection of the eggs of this fish not 
having been previously accomplished it was a point of interest to ascer- 
tain whether they were deposited by the parent among the gravel in 
the river bed, as is the case with the Salmon Trout, and European 
Grayling (Zhymallus), or whether, as obtains with another allied form, 
the European Cucumber Smelt (Osmerus). they are deposited upon and 
adhere to solid substances, such as submerged rocks or timber, as has 
been suspected by some authorities, The experiment made had resulted 
in determining that the eggs were non-adherent, and sunk to the bottom 
of the water immediately on exclusion. A remarkable feature of these 
eggs was their excessively small size, they not exceeding individually a 
millimetre in diameter, so that over 600 might be contained in a single 
even layer having the dimensions of one square inch. As compared 
with the eggs of the salmon and trout it had been observed that the 
developing embryo occupied a much larger portion of the cavity of the 
egg, the yolk sac being almost completely absorbed in the liberation of 
the young fish. There is in consequence no semi-inactive or “alevin” 
stage with this species as found in the trout and salmon, the fry on 
emergence being remarkably slender and buoyant, and swimming 
actively towards the surface of the water. A more exhaustive 
technical paper upon the development of this species was promised by 
Mr. Saville-Kent at a later date. The success he had obtained in the 
culture of the several hundred fry then in his possession made him 
altogether sanguine concerning future operations that would be 
undertaken of rearing them on an extensive scale for the re-stocking 
of our Sonthern rivers. 
Mr. Sprent laid on the table some copies of a geological map of 
Tasmania, prepared at the Crown Lands department. 
Hobart, May 12th, 1885.—James Barnard, Esq., Vice-President, 
in the chair. 
Hon. Members.—The Hon. William Macleay, F..L.8., M.L.C., 
&c., and Edward Pierson Ramsay, F.R.S.E., F.LS., &c., &c., Curator 
Australian Museum Sydney. 
The Chairman announced that since their last meeting they had 
received from the executors of the late Dr. Joseph Miltigan a legacy of 
£350, which was to be devoted to furthering the various objects of the 
society. Although it was nearly 30 years since Dr. Milligan quitted 
Tasmania for Europe, he had nevertheless taken a vivid interest in the 
affairs of the society, and this had culminated in his final act of 
bequeatbing such a handsome legacy to the institution he loved so well. 
