JOURNAL OF MICROSCOPICAL SCIENCE. 
DESCRIPTION OF PLATE VI, 
Illustrating Dr. Greville’s paper on New British Diatomacez. 
Fig. 
1.—Cocconeis pinnata, Greg. 
2—- 45 Arraniensis, Grey. 
3.—Coscinodiscus Normanni, Greg. 
4—7.—Nitzschia arcuata, Greg. 
8, 9.— z macilenta, Greg. 
10, 11.—Navicula forcipata, Grev. 
12.—Pinnularia semiplena, Grev. 
18, 14.—Achnanthes Gregoriana, Grev. 
15—17.—Podosira levis, Greg. 
All the figures are x 400 diameters, except that of Coscinodiscus Normanni, 
which is x 800. 
