NOTES AND EXHIBITS. 159 



imbedding histological material in paraffin. The imbedding 

 vessels are set in trays, and surrounded with oil-jackets. Closed 

 vessels for melting paraffin serve to keep the latter free from 

 dust. In three trays, there is provision for imbedding 36 speci- 

 mens in separate vessels. 



Dr. Chapman communicated a note on the origin of the pre- 

 cipitate in precipitin-reactions from the globulin-fraction of the 

 antiserum. Experiments showed that the main weight of tlie 

 precipitate was due to denatured globulin. 



Mr. A. A. Hamilton exhibited, from the National Herbarium, 

 specimens of {\) Olearia mi/rsiiioides F.v.M., (/Js^er myrsinoides 

 Labill); Mt. Victoria (Fairy Bower) [A. A. Hamilton; November, 

 1913]. A form of this species, which owes its altered facies to 

 environment The examples commonly found on the Blue 

 Mountains, grow on the poor, rocky hillsides, and exhibit the 

 xerophytic characters of low straggling growth (1-2 ft.), sclero- 

 phyllous leaves, etc. The specimens exhibited were taken from 

 a luxuriant bush growing in a rich deposit of vegetable detritus 

 in the midst of forest-vegetation, and near a watercourse, 5 feet 

 in height, and with leaves 3 inches long, and nearly 2 inches 

 wide, on petioles of J inch. The ordinary mountain-form, of 

 which a specimen was shown for comparison, has leaves from ^-1 

 inch long, and k inch wide, with a short petiole. The original 

 species (-^. myrsinoides Labill.) has sessile leaves, rarely above 

 h inch. There are examples of the form, under review, in the 

 National Herbarium from Mt. Victoria (J. H. Maiden; Decem- 

 ber, 1896) ; between Lawson and Wentworth Falls (Captain 

 Murray; October, 1899); Jenolan Caves(W. F. Blakely; January, 

 19U0). — {2} Lepidosper ma Jle.vuosf uaJi.Br.; Leura(A. A. Hamilton; 

 April, 1914); showing a transition in the inflorescence from a single 

 spikelet to a branching panicle. This, and the following species 

 have not been recorded from the Blue Mountains previously. — 

 (3) Lepidospenna Jili/orme Labill.; Leura(A.A. Hamilton; April, 

 1914); the specimens have, in nearly every case, one spikelet 

 only. Labillardiere's figure (PI. Nov. HolL, i., t.l5) shows a 

 spike with fourspikelets. —{-i) Acacia Jioribuiida Willd.; Meadow 



