190 МЕ. G. S. WEST ON THE FRESHWATER ALOE 
horn was very short, acute, and slightly variable in its position relative to 
the first one, but in every specimen seen it was situated much nearer to the 
first antapieal horn than has been described or figured for any European 
specimen. (Vide Lemmermann, in Arch. Bot. К. Sv.Vet.- Akad. ii. (1904) no. 2, 
t. 2. figs. 1-49; W. & С. S. West, in Trans. Roy. Soc. Edinb. xli. part ш. 
(1905) p. 494, fig. 1 A-D ; in Trans. Roy. Irish Acad. xxxiii. sect. B, part и. 
(1906) p. 94, figs. 1-9.) 
IV. GENERAL SUMMARY OF THE INVESTIGATION. 
1. The Algee observed in Dr. Cunnington’s collections can be summarized 
as follows :— 
. Genera, | Species. | ау алейев 
КИНИ i 
| | 
, CHLOROPHYCEÆ, | | 
| C(Edogoniales ............ 2 6 | 1 | 
Cheetophorales ............ 4 4 | 
Cladophorales ............ 2 7 | 
Conjugate .............. | 17 123 12 
| Protococcoidee — .......... | 27 48 17 
| | 
' HETEROKONT X. | | | 
Confervales ............. || 1 1 | | 
| BACILLARIE®, | | | 
Centrieg ................ | 3 7 | 3 | 
Pennate ................ 18 86 | 15 | 
| MYXOPHYCEÆ. | | | 
| Hormogonee ............ | 17 62 | 2 
| Coecogoneg .............. | 10 24 | 1 | 
| | 
| PERIDINIEA. | | 
Peridiniales .............. 4 5 | 
а —— 
Total ...... 105 372 | 51 | 
These results have added greatly to our knowledge of the geographical 
distribution of freshwater Algz in tropical Africa. 
2. Of theabove, 1 genus, 36 species, and 18 varieties and forms are described 
as new. 
3. The plankton collected in Nyasa in June 1904 contained 48 species of 
Algæ, which are chiefly interesting in comparison with Dr. Fiilleborn’s more 
extensive collections from 1898 to 1900. 
4. The plankton from Victoria Nyanza was collected in April 1905 and 
contained 58 species. Again, the chief interest of these collections lies in a 
