Hilgendorf. — Artesian Wells in the Christchurch Area. 159 



observations for me or definitely placed wells at my disposal. Mr. Gray has 

 supplied analyses of the gaseous contents of well-waters. Mr. W. Paine, 

 telegraphist at the Bealey, has made for me very careful measurements 

 of the height of the Waimakariri. The following have supplied me with 

 rainfall records either for short periods or for the whole year : Messrs. G. 

 Gray and G. Rennie at Lincoln, J. Brunton and R. Ellis at Rolleston. 

 Griffith Smith at Lawford, J. Wilson at Kirwee, J. Reid Wilson at Dar- 

 field, G. Hall at Hororata, W. Hall and G. C. Hunt at Glenroy, P. H. 

 Johnson at Mount Torlesse, and, finally, the Government Meteorologist for 

 several stations. Mr. Hogg was kind enough to make the calculation 

 concerning the alteration in the volumes of the dissolved gases under 

 changes of pressure, and Dr. Evans and Mr. McLeod to provide material 

 for apparatus. To all these I beg to offer my thanks, as without their 

 co-operation this paper could not have been written in its present form. I 

 have also to acknowledge the assistance given by the observations made by 

 the late Captain Hutton. 



Art. XV. — A New Genus and some New Species of Plants. 



By T. F. Cheeseman, F.L.S., F.Z.S., Curator of the Auckland Museum. 



[Bead before the Auckland Institute, 28th November, 1911.] 



1. Alectryon grandis Cheesem. sp. no v. 



Arbor 15-pedalis et ultra ; ramulis sericeo- et ferrugineo-pubescentibus. 

 Folia pinnata, alterna, breviter petiolata, 22-30 cm. longa ; foliola 2-3- 

 juga, brevissime petiolata, late oblonga vel ovato-oblonga, obtusa vel 

 subacuta, 10-18 cm. longa, 5-9 cm. lata, praeter costam venasque pri- 

 marias plus minusve sericeo -pubescentia ; venis ultimis conspicue reticu- 

 latis, subtus elevatis. Flores ignoti. 



Hob. — Cliffs on the north side of the Three Kings Islands ; a single 

 small clump alone seen. T.F.C. 



This is the plant referred to at page 103 of the Manual under the name 

 of Alectryon excelsum var. grandis. Although no doubt existed as to its 

 being a distinct species, I have'deferred describing it as such, in the hope 

 that some visitor to the Three Kings Islands might return with flowering 

 specimens. But, as twenty -two years have elapsed since its original dis- 

 covery without producing any additional information, it seems advisable 

 to publish it without further delay. As the islands are now visited at 

 least once every year, I trust that the publicity drawn to the plant may 

 result in its rediscovery. 



A. grandis can be distinguished from A. excelsum without the slightest 

 difficulty by the small number of leaflets to each leaf, and by their shape 

 and much greater size. In A. excelsum the leaflets are 2—4 in. long, and 

 are ovate-lanceolate in shape; whereas in A. grandis they are 4-7 in. in 

 length, and are broadly oblong or ovate-oblong. They are also firmer 

 in texture, and much more obtuse. 



