Annals of the Transvaal Museum. 
15 
is rather surprising, but they may have come from eggs. Although 1 know 
that Mr. Milne has worked at the Bdelloida of mosses, he has not included 
any of the moss dwellers in the list which he supplied to Mr. Rousselet. 
Although forty species is a considerable number to obtain from dry 
mosses, our mosses yielded more than that. Several species were observed 
which have not yet been described, but they were previously known to 
other naturalists. Some other distinct species were found, but they were 
not sufficiently studied. 
Resume of all African Bdelloids. 
Historical sketch. — In this account of the history of the knowledge 
of African Bdelloids only the continent is considered — the islands are 
left out of the account, except when the general distribution is in question. 
The first mention of African Bdelloids I find in Ehrenberg, who in 
1832 ( 10 ) records three species for North Africa, and in a later paper of 
the same year these species are described (11). They are Hydrias , 
Typhlina, and Rot. vulgaris. In the Mikrogeologie , 1854 ( 12 ) he adds the 
three species Callidina rediviva, C. tetraodon, and C. hexaodon, possibly 
recorded in earlier papers which I have not traced. In the same year 
Schmarda ( 32 ) notes four species in Egypt, and in 1859 ( 33 ) he mentions 
the same four. 
For more than thirty years I find no further note of African Bdelloids, 
when in 1891 Stuhlmann records a Rotifer sp. for the Victoria Nyansa 
( 34 ). In Barrois and Daday’s ten Rotifera from Egypt 1894 (2), there 
does not appear to have been any Bdelloid, according to Daday 1910 ( 9 ). 
In 1896 Collin found three species, including the new species Phil, emini, 
in Stuhlmann’s material from East Africa ( 6 ). In 1898 Marchoux ( 18 ) 
described Phil, parasitica from Senegal. In 1907 Daday (7) mentions two 
species from the Victoria Nyanza, and in 1910 (8) he records ?ct nurus 
for the Soudan, and later in 1910 ( 9 ) seven species for German East Africa. 
There remain only my two papers — 1908 (23), nine species (one new) 
from Old Calabar and Uganda; 1911 (27), thirty-three species (nine new) 
from British East Africa. The papers on South African species were noted 
in the Introduction. 
From these various works I have compiled the accompanying list 
of all known African Bdelloids. The list includes the doubtful species 
recorded by Ehrenberg and Schmarda. It is now questioned whether 
some of Ehrenberg’s species were even Bdelloids at all. These doubtful 
species, which we still cannot authoritatively disallow, are indicated by 
an asterisk. 
The distribution in Africa is indicated in twelve columns, but the world- 
distribution in detail is not attempted, though some notes on the subject 
are added. 
In 1907 the British Antarctic Expedition collected eleven species of 
Bdelloids on Table Mountain, which have not yet been recorded. As the 
paper dealing with them goes to press about the same time as this, and 
as it is quite uncertain which will appear first, they are included in this 
list. Among them is the new species Dissotrocha pectinata. 
