Notices of Memoirs — Carboniferous Life-zones. 519 



secondary wood there is a fairly complete and narrow ring of 

 centripetally developed xylem. In the pith there are" numerous 

 secretory canals and nests of dark-coloured sclerous cells. No 

 definite traces of primary xylem like that of Lyginodendrou 

 Oldhamium have been detected. As a matter of convenience the 

 specimen may be designated Lyginodendrou robustum. 



VIII. — Note on some Fossil Plants from South Africa. By 

 A. C. Seward, M.A., F.G.S. 



rPHE author has recently had an opportunity, through the kindness 

 X of Mr. David Draper, F.G.S., of examining a collection of 

 fossil plants from a locality a short distance south of Johannesburg. 

 The collection forwarded to England by Mr. Draper includes 

 examples of Glossopteris, Vertebraria, and other genera, associated 

 with specimens of Lepidophloios. The occurrence of Lepidodendrons 

 in strata containing typical members of the Glossopteris flora is 

 extremely important from the point of view of the geological and 

 geographical distribution of fossil plants, and specially interesting 

 in connection with a similar association lately recorded by Professor 

 Zeiller in Brazilian plant-bearing beds. In South Africa, as in 

 South America, we have evidence of the existence of a plant genus 

 characteristic of the Upper Palaeozoic flora of the northern 

 hemisphere, in the same region with the Permo-Carboniferous 

 Glossopteris flora. 



IX. — Life-zones in the British Carboniferous Bocks. — Beport 

 of the Committee, consisting of J. E. Marr, F.B.S. (Chairman), 

 E. J. Garwood, F.G.S. (Secretary), and A. H. Foord, F.G.S., 

 appointed to study the Life-zones in the British Carboniferous 

 Bocks. (Drawn up by J. E. Marr.) 



IN a paper read before the British Association at Ipswich in 189o, 

 two of us called attention to the work of Dr. Waagen on the 

 Upper Paleozoic rocks of the Salt Bange, and gave reasons for 

 supposing that the Carboniferous rocks of Britain might be divided 

 into zones. 1 In that paper it was suggested " that a committee be 

 appointed to inquire into the possibility of dividing the Carboniferous 

 rocks into zones, to call the attention of local observers to the 

 desirability of collecting fossils with this view, and, if possible, to 

 retain the services of eminent specialists to whom these fossils may 

 be submitted." This committee was appointed, and the members 

 thereof beg leave to submit their report. 



The Committee believes that the following districts would furnish 

 good results, and recommends that those whose names are appended 

 to the various districts be asked to take charge of their particular 

 districts and to endeavour to carry out therein the objects of the 

 Committee — 



1 See Rep. Brit. Assoc. 1895, p. 696. 



