300 Transactions.— Geology. 



pluribus, arcuatis, inferlorihus extrorsum ramosis ; nervis ter- 

 tiariis tennibus, anguUs suhrcctis excuutihus, inter se conjunctis; 

 reticule obsoleto. 



Locality: Pakawau, Nelson (Canterbury Museum). [Ex 

 Coll. N.Z. Gaol. Surv. ; Hector.] 



A leaf which, as regards shape, reminds one of the larger 

 leaves of Fagus muelleri, which are long and become narrow 

 towards the top ; the leaf agrees also with these as regards 

 the leathery texture ; but as this leaf is considerably larger 

 than those of F. muelleri, and as the nervation deviates in 

 several respects, I believe that it belongs to a distinct species. 

 The edge is provided with comparatively small serrations, 

 "vvhich are bent forward ; the base is scarcely narrowed and 

 somewhat blunt. Notwithstanding the fossil seems very much 

 torn, it is possible to discern sufficiently the course of the 

 nerves. From the stroaght primary nerve, which is very 

 strongly pronounced to the middle of the lamina, start curved 

 secondary nerves, which ascend to the edge ; the lower of 

 these seem somewhat closer, and provided with pronounced 

 outer nerves. The tertiary nerves are preserved only in a few 

 places ; they are very delicate, run straight and almost at 

 right angles ; they cross and connect with the secondary 

 nerves. There is no trace of the reticulation preserved. A 

 comparison of this interesting fossil with other similar forms 

 must be left to future researches, as soon as more ample ma- 

 terial will permit of such ; but I believe I must mention here 

 that F. producta must be placed in the division Nothofagus. 

 Of the now living species of this division, F. dombeyi, Mirb., 

 betrays the nearest relation. 



Ulmace^. 



Gen. Ulmopliylon. 



Among these I count fossil plants of the Chalk flora which 

 according to their characteristics belong well to the UlmacecB, 

 but which cannot be enrolled with any living genus. The two 

 species here described have leathery leaves, one of which 

 shows the closest relation to Ulmus, the other to Plancra. 

 Both genera are found in the Tertiary flora of New Zealand. 



Ulmophylon latifolium, sp. no v. 



Plate XXXII., figs. G-8. 



U. foliis subcoriaceis, petiolatis, late ovutis, basi incBquali 

 vel obliqua obtusis, apice acuminatis, margine incequaliter vel 

 duplicato-dcniatis ; nervatione craspcdodroma, nervo priniario 

 valido, recto, excurrente ; nervis secundariis prominentibus, sub 

 angulis 40°-50° orientibus, basin versus approximatis et nervos 

 cxternos cmittentibus, supcrioribus simplicibiis ; nervis tertiariis 



