DIATOMACEiE OF KERGUELEN’S LAND. 
91 
mediam attingentibus. Longit., •0168mm.- , 196mm. ; latit., 
•0084mm. 
Pinnularice. — species. Cellulis, late ovato-ellipticis, polis subito, 
angustatis, apicibus, rotundatis, nodulo centrali firmo, striis trans- 
versalibus distinctis, lineam mediam attingentibus. Longit., 
•0224mtn.; longit., *01 11. 
Synedra Vaucheidce, Kutzing. 
Eunotia pectmalis, Dillwyn. 
Denticula thermalis , Kutz, var. minor. — Longit., *0168 mm. ; 
latit., *0056 mm. 
Cymbella gastroides, Ehr. 
The above list of Diatoms is extracted from T. F. Reinsch’s 
Catalogue of Freshwater Algae, collected by the Rev. A. E. Eaton 
in Kerguelen’s Island. It is much to be regretted that this 
portion had not been more carefully revised. There are more 
errors in it than would be found in double the number of pages in 
any cheap scientific periodical, as the following errata will 
prove : — 
Aclianthes instead of Achnanthes. 
Larilella and Lurilella instead of Surirella. 
Amphiprora Pockorngana instead of Porkornyana. 
The omission of specific names when new species are described 
is a source of much inconvenience to other observers, particularly 
in labelling slides, and is a worse practice than using the names of 
individuals for specific distinctions. 
F. Kitton, Hon., F.R.M.S. 
PREPARATIONS OF ALGiE. 
A series of microscopical slides, illustrating the principal genera 
of British Freshwater Algce, has been prepared by Messrs. Joshua 
and Holmes, of which we give a list. Such a collection must 
prove most valuable to a student, and far superior to the most ela- 
borate figures, in giving accurate notions of the characteristics of 
genera and families. 
1. Licmophora splendida, Grev. 
2. Isthmia nervosa, Ktz. 
3. Aphanocapsa virescens, Kab. 
4. Oscillaria limosa, Ag. 
5. „ muscorum, Ag. 
6. Nostoc commune, Vauch. 
7. „ granulare, Ktz. 
8. „ rupestre, Ktz. 
9. Cylindrospermum macrospermum, Ktz. 
