18 
DoNKiN_, on Marine Diatomaceae. 
Navicula clavata, Greg. Trans. Micr. Soc./ vol. iv^ Pl.V, 
fig. 17). 
Erequent at Chibburn Mouthy Druridge Bay, and very 
large. 
Navicula maxima, Greg. {' Cly. For./ pi. i, fig. 18). 
Frequent at Cresswell. 
Navicula angulosa, Greg. ('Trans. Micr. Soc./ vol. iv, 
PI. V, fig. 8). 
At Linemoutli plentiful. 
This species is very easily recognised from N. Barclay- 
ana, Greg. I did not find a single frustule of it in the 
gathering from Cresswell_, in which the latter form was most 
abundant. 
Navicula Barclay ana, Greg. (' Cly. For./ pi. i, fig. 9) . 
Frequent in many localities ; at Creswell abundant. 
Easily recognised from N. palpebralis, Breb. 
Amphiprora maxima, Greg. C^Cly. For./ pi. iv_, fig. 61). 
Frequent ; at Cresswell plentiful. 
Apr. pusilla, Greg. C^Cly. For./ pi. iv_, fig. 56). 
Frequent ; at Cresswell plentiful. 
Apr. lepidoptera, Greg. {' Cly. For./ pi. iv, fig. 59) . 
Frequent near Newbiggin. 
Amphora Grevilliana, Greg. (*^Cly. For./ pi. v, figs. 89 
and 90). 
This beautiful and strongly marked species is abundant at 
Cresswell and frequent at Linemouth. 
A. cymbifera, Greg. Cly. For./ pi. vi, fig. 97). 
Plentiful at Linemouth. 
A. Icevis, Greg. (''Cly. For./ pi. iv, fig. 74 c). 
This species is abundant near Newbiggin. In Druridge 
Bay I have found frustules identical with that of fig. 74^d^ 
which Professor Gregory now considers to be a distinct spe- 
cieSj and not a variety of A. Icevis. 
A. lavissima, Greg. {' Cly. For./ pi. iv, fig. 72). 
At Newbiggin very abundant. 
A. robusta, Greg. (' Cly. For./ pi. iv, fig. 79). 
This interesting and well-marked species is frequent at 
Cresswell. 
Cocconeis distans, Greg. {' Cly. For./ pi. i, fig. 23) . 
Near Newbiggen frequent. 
III. New Species. 
The first two species which I have to describe as new are 
forms so remarkable, and so different in certain structural 
peculiarities from every member of any of the genera hitherto 
