9« 



DR. F. KURTZ ON THE CLARKE COLLECTION OE [Feb. I903, 



I established it in 1894 (op. cit.) • and I believe that Mr. Arber, with 

 my specimens and drawings in hand, will adopt my view. 



My second remark bears upon Otopteris ovata, McCoy, which 

 Mr. Arber separates specifically and generically from Ehacopteris 

 incequilatera (Goepp.) Stur, Fstm., as Aneimites ovata (McCoy) 

 "N. Arber. Of the single specimen of this plant in the Clarke 

 Collection, Mr. Arber observes, on p. 21 of his paper: — 



' The nervation in the Cambridge specimen is finer, more graceful, and less 

 rigid, and at the same time somewhat closer, more radiating, and spreading. 

 The nerves also dichotomize more than once, in some cases as often as four 

 times.' 



These remarks apply equally well to the plant — also from 

 Arowa — figured by Feistmantel (5) in his pi. vi, fig. 1 (but less to 

 pi. iv, fig. 3), the veins of which, so far as can be seen, dichotomize 

 as much as three times, and the aspect of which in general is not 

 so rigid as that of the specimens represented in Eeistmantel's 

 pis. v, viii, etc. Whether Aneimites austrina, Eth. belongs here 

 I cannot say, as we do not possess the publication in which it 

 is figured. There does not appear to be sufficient evidence for 

 separating Otopteris ovata, McCoy from Rhacopteris incequilatera, 

 Stur, where it may well be retained, perhaps as a variety — var. 

 ovata (McCoy sp.) : ' pinnarum nervi tenuiores, repetito (ter 

 quaterve) dichotomi, unde rami eorum excurrentes numerosiores, 

 densioresque.' 



As a closing remark I may add that Bliacopteris incequilatera, 

 Stur, has also been found in the Argentine, and was described by 

 Geinitz (6) as Otopteris argentinica, Gein. 



Bibliography. 



(1) F. Kurtz. : Contribuciones a la Palaeoplrytologia Argentina: II. Sobre la 

 Existencia del Gondwana inferior en la Republiea Argentina' Revista del Museo 

 de La Plata, vol. vi (L894) pp. 125-39 & pis. i-iv. Translated in Rec. Geol. Surv, 

 India, vol. xxviii (1895) pp. 111-17. 



(2) L. Szajnocha. ' Ueber f'ossile Prlanzenreste aus Cacheuta in der Argentinischen 

 Republik ' Sitzungsber. d. k. k. Akad. d. Wissensch. Wien, math.-naturw. CI. vol. 

 xcvii (1888) pp. 219-45 & pis. i-ii. 



(3) 0. Feistmantel. ' Uebersichtliche Darstellung der geologisch-palaontolog- 

 ischen Yerhaltnisse Siid-Afrikas : I. Theil. — Die Karoo-Formation una die 

 dieselbe unterlagernden Schichten ' Abhandl. d. matb.-naturw. CI. d. k. bohm. 

 Gesellscb. d. Wissensch. Prag, ser. 7, vol. iii (1889), No. 6 ; 89 pp. & 4 pis. 



(4) R. Etheridge, Jun. ' On the Occurrence of a Plant, allied to Schizoneura, 

 in the Hawkesbury Sandstone ' Rec. Geol. Surv. N. S. W. vol. iii, pt. iii (1893) 

 pp. 74-77 & pi. xiii. 



(5) O. Feistmantel. 'Geological & Palseontological Relations of the Coal- and 

 Plant-bearing Beds of Palaeozoic & Mesozoic Age in Eastern Australia & 

 Tasmania, with Special Reference to the Fossil Flora ' Mem. Geol. Surv. N. S. W. 

 Palaeontology, No. 3, 1890. 



(6) H. B. Geinitz. ' Beitrage zur Geologie und Palaontologie der Argentinischen 

 Republik II. Palaontologischer Theil. lite Abtheilung : Ueber rhatische 

 Pfianzen- und Thierreste in den argentinischen Provinzen La Rioja, San Juan, u. 

 Mendoza ' Cassel (1876) ; 14 pp. & 2 pis. 



Discussion. 



Mr. E. A. N. Arber remarked that the first part of the Author's 

 criticism was concerned with the species described in the speaker's 

 paper (p. 17) as Nceggeratliiopsis Goepperti (Schmal.). He was 



