342 Transactions. — Botany. 



Surirella contorta, F. Kitton, n.s. 

 This species is supposed at present to be peculiar to New Zealand, and 

 besides appearing in Lake Sumner deposit, it is found in deposits from 

 Manawatu and Whangarei. Mr. Kitton described it in the Monthly Micro- 

 scopical Journal for November, 1874, as follows : — 



" Valve elliptically or slightly ovate, canaliculi fine, numerous ; alas in- 

 conspicuous, narrow median elevation terminating in short spines, surface 

 of valve obscurely striate, valve in front view contorted." 

 Plate XXIX., fig. 2, side view. 



Stauroneis (or Pleurostauron) fulmen, Brightwell, n.s. 

 This form is very scarce in the deposit, but was found quite recently by 

 me in quantity in freshwater at Ngapari, Fernside, and was described as 

 S. huttonii in a paper I read at a meeting of the institute on the 4th May 

 as follows : — 



" Front view oblong, with a marked depression at the line of suture, 

 length rather more than six times its breadth. Side view, with three infla- 

 tions on both sides, those at each end slightly less than those in the middle, 

 valve narrowing towards the ends, which are obtuse. Staurqs, linear, 

 dilated towards the margin of valve, reaching the margin. Length, -008 of 

 an inch." 



I subsequently found that it had been figured and described in almost 

 identical terms in the Proceedings of the Eoyal Microscopical Society, 

 volume 7, page 179, by Mr. Brightwell as "freshwater. Melbourne." I have 

 accordingly withdrawn the paper. 



Hab. Freshwater, Melbourne ; Ngapari, Fernside ; fossil, Onehunga ; 

 Lake Sumner ; Amberley. 



Plate XXIX., fig. 3, a. front view, b. side view. 



Of the three species just described — specially New Zealand forms — I 

 have thought it desirable to reproduce the figures. 



The following is a list of the species already found, for which I am 

 indebted chiefly to the kindness of Mr. E. Grove, of Saltburn, England: — 

 Epithemia zebra, var. proboscidea. 

 ,, sorex. 

 „ gibba. 

 ,, turgida. 

 Eunotia pramrpta var. bidens. 

 „ diodon. 



„ eruca (arnphicampa) . 

 Eueyonema gracile. 



„ ctespitosum var. 



Amphora ovalis. 

 Surirella splenclida. 

 ,, contorta, n.s. 



