Ixorrs.—On the Diatomaceous Deposits of New Zealand. 848 
Triceratium trifoliatum. 
Nitzchia pana 
amphioxys. 
Navicula n ois 
8. 
- rma var. amphigomphus. 
i. » var, subampliata. 
»,  bacillum var. 
»  elliptrica. 
Gomphonema constrictum. 
» clavatum. 
Stauroneis (Pleurostauron) fulmen 
n 5 fr umiai. 
5 a javanicum. 
" aeutum. 
cease: 
Matoéire ERRA 
Cymbella scotica. 
Pinnularia punctulata. 
Wainui, Akaroa Harbour. 
This freshwater deposit is extensive and so pure as to render it suitable 
as an article of commerce. The following species have been already 
found :— 
Epithemia ventricosa. 
musculu 
p proboscidea. 
- longicornis. 
Synedra ulna. 
Odontidium mutabile. 
as var. 
ie pitta 
Pinnularia nobilis. 
Cymbella affinis. 
Melosira punctata. 
Eunotia arcus. 
Dunedin.—Green Island, 
This is a freshwater deposit taken from a railway cutting near Green 
Island, and is chiefly composed of— 
Eucyonema czspitosum. 
Cust Valley, North Canterbury. 
I discovered a smáll pocket of this sub-peat deposit, about five years 
ago, which consisted chiefly of the doubtful genus Amphicampa, and was 
