478 Correspondence — S. S. Biichnan. 



preserved, the remainder having been destroyed during the period of 

 denudation follov^ing its formation ; this period continues at the 

 present day. 



As to the age of these deposits, the researches of Seward and 

 Zeiller on the plant-remains have shown that the lower etage of the 

 Upper Karroo of the Transvaal is of Permo-Carboniferous age. 



The wording of the title of the paper here reviewed is somewhat 

 surprising. We remember that the author figured as delegate of the 

 " South African Republic " at last year's International Geological 

 Congress. But then the Congress was somehow connected with 

 the Exhibition. In the present instance we are sorry to state that 

 a scientific society does not refrain from imparting a political bias 

 to a purely scientific paper, which, coupled with the expressions of 

 the President of the French Geological Society when welcoming the 

 author (p. 9), seems hardly friendly towards this country. 



GOI^x^:E]SI^OI^^3DSI^^OJa. 



JUEASSIC BRACHIOPODA. 



Sir, — May 1 beg a little of your valuable space to make a cor- 

 rection in my paper " Homoeomorphy among Jurassic Brachiopoda " 

 (Proc. Cotteswold Nat. F.C., vol. xii). Therein I have figured and 

 described a new species as Zeilleria subcornuta, the specific name 

 being the same as was used between Dr. Davidson and myself 

 twenty years ago in correspondence about the same shell. But 

 there is already a suhcornuta used by Quenstedt, and it would also 

 be Zeilleria subcornuta. Wherefore I desire to change the name of 

 my species to Zeilleria cornutiformis. I would take this opportunity 

 to thank you for your kindly notice of this paper, but may I ask if 

 your reviewer has quite separated " time-table " from a table of strata 

 when he surmises that perhaps I claim no more than a local value 

 for my " elaborate time-table." Certainly I made no definite claim ; 

 but I own to thinking that a time-table, as such, is of worldwide 

 application. There is no local limit to time, and there can be no 

 local limit to a time-table. Whether the records of the rocks in. 

 distant localities may be sufficiently perfect to enable their dates 

 to be stated with as great exactitude as in my time-table, is another 

 matter. But the table of strata which I have given in connection 

 with this time-table shows that from Yorkshire to Dorset, from 

 Dorset to Wiirtemberg, the time-table is a means of exactly dating 

 Jurassic events; therefore it has much more than a local value. 

 But in that table I gave the results of only my own work, and 

 refrained, except in one or two striking instances, from quoting 

 literature. Had I done so, it would have shown even more clearly 

 that the time-table is a means whereby Jurassic events over a large 

 part of Europe can be exactly dated now ; and there is good reason 

 4o think that the same may be said of a far wider field in the future. 



S. S. BUOKMAN. 



