Gkiffin. — Development of Neiv Zealand Conifer Leaves. 43 



care which the author has displayed in collecting his data 

 are worthy of admiration, and this paper will always remain 

 a standard one with reference to the form of the cross section 

 of the river-beds from terrace to terrace, whatever the cause 

 of this form may be. 

 Dr. Albert Heim, Professor : " Neujahrsblatt von der Natur- 

 forschenden Gesellschaft auf das Jahr, 1905, Neuseeland.*' 

 Zurich, 1905. 



EXPLANATION OF PLATES VI-VIIa. 

 Plate VI. 



1. Looking south-west through the Rakaia Gorge. The terrace in the fore- 



ground has been eroded largely from solid rock, outcrops of which 

 can be seen on its level surface in three places. 



2. Upper Waimakariri. Partially truncated spur, taken from the top of 



another on opposite side of river-bed, which is here about three-quarters 

 of a mile wide. 



3. Looking down Rakaia River from the Gorge Bridge, showing river-bed 



and high terraces. 



Plate VII. 



1. River Hawden, at junction with the Waimakariri, showing aggrading 



shingle-streams filling up the bottom of an old lake-bed. 



2. Upper Waimakariri River, showing rochcs moutonnees and glacial terrace, 



near top of picture. 



Plate VIIa. 

 Map of part of Canterbury District. 



Art. III. — The Development of some New Zealand Conifer 

 Leaves with regard to Transfusion Tissue and to Adaptation 

 to Environment. 



By Miss E. M. Griffin, M.A. 



Communicated by Professor A. P. W. Thomas. 



[Read before the Auckland Institute, 14th November, 1906.] 



Plates VIII-X. 



The present investigations have been confined principally to 

 species of two genera, Podocarpus and Dacrydium, both belonging 

 to Eickler's and later to Engler's group Podocarpece, which by 

 many botanists are regarded as being more or less primitive 

 Conifers. 



As far as I have been able to ascertain, the species taken 

 as the objects of this research have not yet been investigated 



