22 Proceedings of the 



the structure of the electrical organs themselves, in which he had hitherto 

 failed in detecting lozenge-shaped plates or octahedral cells, but could 

 make out only a fine fibrous meshwork, permeated by a gelatinous granu- 

 lar substance, as had been previously stated by Geoffroy. The presumed 

 inner electrical organs he found, as Pacini had described, to be merely 

 fibrous membranes, with subjacent fatty deposits. 



V. Dr Lowe exhibited some interesting specimens sent home by the 

 Rev. Mr Waddell. Among these was a lizard, evidently belonging to the 

 Monitor class of lizards. It was about a foot in length, and beautifully 

 banded and spotted, bearing a close resemblance to the figure given in the 

 ninth volume of Cuvier's Animal Kingdom as Monitor pulcher of Leach, 

 but differing from that species by the rings on the tail being continued to 

 the extremity. Two large myriapods, — one, which appeared to be Julus 

 maximus, was about seven inches long, having fifty-four rings. It was 

 a male, the very remarkable organs of reproduction being very conspi- 

 cuous on the sixth ring. The last ring but one was prolonged so as to 

 almost form a tail. On each leg, except on the first three or four pairs 

 and on the last seven or eight, was a remarkable gland-like body, situate 

 on the joint immediately before the claw. These were probably analo- 

 gous to the bodies observed in the foot of flies, and for the same purpose, 

 viz., to assist in walking. The other Julus was evidently a female, as 

 shown more particularly by the fringes on the sixth ring. This specimen 

 measured no less than nine inches, and had sixty-six scales or rings. Al- 

 though a difference of sex might account for some variety of appearance, 

 Dr Lowe had no doubt that this specimen belonged to a distinct species. In 

 particular, he pointed out the beautiful sculpture to be observed upon its 

 surface, and the greater length of the antennae. The penultimate segment 

 also was not in any degree prolonged, and the legs were provided with two 

 instead of one of the gland-like bodies already mentioned. Lastly, Dr Lowe 

 showed two cockroaches of an unusual appearance, and some spiders, the 

 whole of which had been sent by Mr Waddell, to* whom the Society had al- 

 ready been so much indebted for various objects of the highest interest. 



VI. Analysis of the Morayshire Slag, exhibited by William Rhind, Esq. , 

 at last Meeting. By M. Forster Heddle, M.D, 



The author stated that the extreme brittleness of this substance, the 

 n amber of vesicular cavities, the pavonine lustre of its fracture, and the 

 separation of minute specks of metallic iron, showed that it was indubitably 

 a slag. In the qualitative analysis he obtained silica, alumina, lime, 

 oxides of iron and manganese, magnesia, potash, soda, and a trace of phos- 

 phoric acid. The quantity of silica is 24*045, of alumina 14*410, of lime 

 2 - 184 ; the proportions of magnesia, potash, and soda being small, he did 

 not determine, and the large excess obtained in the analysis, when the iron 

 was calculated as peroxide, showed that a considerable portion of it (about 



