5-' 



removed from the edge. Umbels axillary with about eighl flowers, peduncle 

 flattened. Calyx tube obconical, stalklet 4 to 6 lines long. Buds longer and 

 larger than those of E. Icevopinea ; operculum hemispherical, shortly acuminate. 

 Anthers reniform, connected above by a prominent connective, valves opening 

 by longitudinal slits. Ovary flat-roofed. 



Fruit.— Hemispherical ; rim truncate of rounded, occa- 

 sionally slightly domed, rarely countersunk 

 like E. pilularis, which they closely resemble 

 in shape in some forms; valves slightly 

 exserted ; 4 to 6 lines in diameter. 



Habitat. — Originally described from material obtained from 

 Barber's Creek, mostly in the gullies. It, however, 

 extends south as far as Monga, N.S.W. 



REMARKS.- -The- fruits and timber are characteristic of this species, and show it to differ distinctly from 

 E. Mm I! nana. A. W. Howitt. It is one of the few " Stringvbarks " that has a " sapwood " — a good specific 

 difference. From its specific name it may be thought that the optical character is the only feature that 

 differentiates this tree from its congener, E. Icevopinea, R.T.B., but such is not the case, and its specific rank, as 

 shown by the above description, is founded on well-defined morphological and other features, as well as on its 

 chemical constituents. 



ESSENTIAL OIL. — Leaves and terminal branchlets for distillation were 

 obtained from Barber's Creek, N.S.W. , in July, 180,8. The yield of oil was 

 0-85 per cent. The crude oil was red in colour, and had a turpentine-like odour. 

 The presence of volatile aldehydes was not at all pronounced, as it was difficult 

 to even detect them by the odour. Phellandrene was quite absent, and cineol 

 almost entirely so, as it could only be detected in the portion boiling at the 

 most favourable temperature. The oil consisted very largely of a highly 

 dextro-rotatory pinene, and a fair amount of esters. The oil of this specie> 

 produces a very good turpentine, quite equal to the commercial article. 



The crude oil had specific gravity at 15° C. = 0-8778; refractive index 

 at 20° = 1-4684, and was insoluble in 10 volumes 80 per cent, alcohol. The 

 saponification number for the esters and free acid was 22-9. 



On rectification about 1 per cent, distilled below 156° C. (corr.\ Between 

 156-162 , 62 per cent, distilled, and between 162-172°, 25 per cent, came over. 

 These fractions gave the following results : — 



First fraction, sp. gr. at 15 C. = 0-8691 ; rotation a„ + 34-40°. 

 Second ,, „ ,, =0-8759; ,, +32-46°. 



Material of this species for distillation was also obtained in August, 1898, 

 from Currawang Creek, near Braidwood, N.S.W., many miles from the first 

 locality. The oil differed in no respects from the first sample. The yield of oil 

 was 0-83 per cent. The crude oil had sp. gr. at 15° = 0-8758. On redistillation 

 63 per cent, came over between 156-162°, and 25 per cent, between 162-172°. 

 The specific gravity of the first fraction was o-86o, and of the second 0-8725. The 

 rotation of the first fraction was a p + 32-83°, and of the second <7„ + 31-7°. 



The principal ester in the oil of this species is geranvl-acetate, and in a 

 >ample of the oil distilled from material collected at Tallong, N.S.W. . in 

 October, 191 1, half the total esters in the oil was saponified in the cold with two 

 hours' contact. 



The oils from Barber's Creek and Currawang Creek were mixed and 

 preserved in the dark, and in October, 1919, twenty-one years afterwards, the 

 sample was analysed. Very little alteration had taken place in the oil during 



