294 Transacl'wns. — Geologij. 



petiole secondary nerves at acute angles. This circumstance 

 occurs neither in Adiantnm nor in Aspleniwn, but it may be 

 observed in Ginkgo. Tlae other secondary nerves, which start 

 in the further course of the primary nerve at very acute angles, 

 are also as fine as the basal ones, and are divided among the 

 lobes, the middle of ^Yhich they traverse to the end, without, 

 however, being bifurcate. As regards their delicacy these 

 nerves have most similarity with those of Ginkgo, as regards 

 their simplicity with those of Phijllocladus. These nerves are 

 most similar to the secondary nerves of PJi. trichovianoides as 

 regards their relation to the lobes. The tertiary nerves start 

 from both sides of the secondary nerves at very acute angles ; 

 they are very delicate, almost straight, close to each other, 

 and they run undivided into the small serrations of the edge. 

 As regards the characteristics just described of the tertiary 

 nerves, the fossil agrees best with Phyllocladus tricliomanoides. 



MONOCOTYLEDONES. 

 Gkabiine^e. 

 Poacites nelsonicus, sp. nov. 



Plate XXX., figs. 22, 22a. 



P. foliis elongatis anguste linearihus, 4-inm. latis : nervis 

 longitudinalihns primariis 6, tenuibns, csqualibns, cuvi nervis 

 interstitialibus solitariis tenuissimis alter nantihiis. 



Locality : Wangapeka, Nelson (Canterbury Museum). 

 [Ex Coll. N.Z. Geol. Surv., 1867 ; Hector.] 



The fossil shown in fig. 22 is a fragment of a long, very 

 narrow blade of grass, which shows a few equally delicate 

 primary nerves, between which run out a few very fine nerves 

 (see enlargement, fig. 22a). The primary nerves approach 

 each other more closely towards the edge ; the substance of 

 the blade is rather firm, almost leathery. A more exact 

 definition of this fragment must be left to future researches. 



Bambusites australis, sp. nov. 



Plate XXX., lig. 21 ; Plate XXXI., figs. 1-3, 3a. 



B. rhizomatc solido lignoso crasso, ramoso (?), culmis 

 validis, 4-6cm. fere crassis, nodosis, tenuiter striatis, nodis 

 prominentibus liinc inde obliquis ; foliis late linearibus, nervis 

 2)rimariis et interstitialibus plurihus. 



Localities : Grey Eiver, Westland ; Pakawau, Nelson (Can- 

 terbury Museum) . 



The remains shown under above figures I take to be the 

 residue of a grass from the division of the Bamhnsece. Fig. 

 21, from Pakawau, is a fragment of the strong ligneous 



