256 Transactions. — Geology. 



do honour to his great merits in the geology of New 

 Zealand. 



A petrified wood has been found in the Tertiary striata at 

 Malvern Hills which agrees best with that of Araucaria, with 

 which species I classify it. 



The transverse section (fig. 10) shows tracheae, thick- walled 

 and with rounded angles, which have been subjected to con- 

 siderable pressure, and which have consequently an elliptic 

 curve ; in only very few places do they retain their form, as 

 t.hown in the section referred to. The decay of the wood, 

 which must have been far advanced, is also perceptible in the 

 longitudinal section. A part of the structure in the best state 

 of preservation is shown in PL XXIX. very nmch enlarged 

 (x350). The pitted cell-fibres are frequent, and consist of 

 one to three rows of cells which lie one above the other. In 

 fig. II (representing longitudinal section between the radii) 

 the structure of the walls of the tracheae is most remarkable^- 

 and agrees with those of Araucaria. The dots are in from 

 two to four rows, close together, and correspondingly flattened 

 as a polyhedron. The tangential section (fig. 12) shows cells 

 in the wood, which wind and run out ; there are also short 

 core-streaks which are each built up (or consist of) from 

 four to eight dotted cells. The tangential walls have no- 

 dots. 



Araucaria danai, sp. no v. 



Plate XXIV., fig. 18. 



A. ramulis elongatis ; foliis coriaceis, lineari-lanccolatis vel 

 iinearibus, rigidis, apice acuviinatis, falcatis, imbricatis, paten- 

 tibus. 



Locality: Shag Point (Canterbury Museum; Otago 

 ^luseum). [E'.r Coll. Geol. Sm-v. Otago, 1862; Hector: and 

 N.Z. Eep., 1872 ; v. Haast, I.e.] 



Fig. 18 represents a fi'agment of a small elongated branch 

 of a shape of Araucaria ; the branch is studded with leaves 

 which are close together, stiff, narrow, somewhat lanceo- 

 late, bent upwards and projecting; the leaves are flat, and 

 in the fossil many are only visible in the longitudinal fraction : 

 this would lead a casual observer to the belief that only very 

 small awl-shaped leaves have existed. 



Among the linng species, Araucaria brasiliensis, A. Rich.^ 

 seems to be more nearly related to the fossil species than 

 A. excelsa, E. Brown, because of the formation of the leaves, 

 notwithstanding that A. excelsa shows a similar sickle-shaped 

 leaf. 



I name this species after James Dana, in consequence of 

 his merits as regards the geology of New Zealand. 



