NOTES AND EXHIBITS. 119 



237) as a tree attaining 20-30 feet, and Mr. J. H. Maiden (Forest 

 Flora of N. S. Wales, ii., 53) says:— "I have seen it up to 

 perhaps 40 ft. in height with a trunk of 12 in." On the dry 

 ridges in the higher parts of the Blue Mountains, it seldom 

 reaches a height of more than 6-8 feet, the example exhibited 

 having matured its fruit when only 1 foot high, — Panax sam- 

 bucifolius Sieb., showing leaf-variation. The leaves are from 

 2 inches to above 1 foot long, simply pinnate, bipinnate to pin- 

 natisect, with 3, 5, 7, 9, 11, 13, 15, 17, or more leaflets. The 

 leaflets are linear, lanceolate, oval, elliptical to rotundate; sessile, 

 or with petioles varying from 1 line to 1 inch long; their apices 

 obtuse, acute, or acuminate, and their margins entire, shortly 

 toothed, deeply toothed, serrate, or lobed. Measurements: 4^ 

 inchs X 2|, 3 X IJ, 3 X 1, 3 X ^, 2 X J, 1^ X 1|, IJ^ x 1, 1x1 line, 

 f X I inch, -J X I inch. 



Dr. H. G. Chapman showed three sections of the small intes- 

 tine, demonstrating the internal marginal layer of the circular 

 muscle fibres; (l)a section of the ileum of the cat, (2) a section 

 of the jejunum of the cat, and (3) a section of the jejunum of 

 man. He had also observed this layer in the intestine of the 

 Echidna. He showed also a section of the fundus of the dog's 

 stomach, demonstrating the resistance of the oxyntic cells to 

 digestive action by the gastric ferments. 



Dr. J. R. Dixon exhibited, under the microscope, transverse 

 sections of the decalcified lower jaw-bone of a dog, prepared by 

 the pyridin-silver-nitrate method. By this method, an elective 

 staining of the sheath, which lines the canaliculi, resulted. This 

 staining showed that the sheath lined also the lacunar spaces and 

 the Haversian canals. The slide further demonstrated not only 

 the free communication, by means of the canaliculi, between 

 the elements of any one Haversian system, but that equally free 

 communication existed between adjacent Haversian systems. 



