Erythrococca and Micrococca. 635 
In South-East Africa there are, again, only two species ; both are con¬ 
fined to the Eastern, or Natal, sub-region, and both are endemic. 
In East Africa there are only five species; all of them, however, are 
endemic. One is confined to the southern or Mozambique sub-region; three 
are confined to the northern or ‘ Zanzibaria ’ sub-region ; the fifth, which 
appears to be a purely littoral species, extends along the Indian Ocean sea¬ 
board from Beira in the south to Mombasa in the north. 
In East Central Africa there are twelve species, nine of which are 
endemic ; of the others, one is manifestly a South-West African overflow, 
the remaining two are clearly overflows from West Central Africa. 
The solitary North-East African species is endemic, but occurs on both 
sides of the Red Sea, in Abyssinia and in Yemen. 
The sub-genus Euerythrococca , with twenty-five species, is represented 
in every region where the genus occurs, but most fully so in East Central 
Africa, where there are nine species ; eight of these are endemic, the ninth 
is an overflow from South-West Africa. In West Africa this subgenus is 
rather poorly represented, there being only four species, two in Upper and 
two in Lower Guinea; all four, however, are endemic. The subgenus 
Athroandra , on the other hand, though it extends through West Central to 
East Central Africa, is mainly West African, all but two of the seventeen 
species which it includes occurring there, and all but four of those that do 
occur there being endemic. Of the two which are not reported from West 
Africa, one is endemic in West Central Africa, the other has so far been 
met with just within the western border of East Central Africa, and, like 
the two remaining Athroandras in that region, may prove to be only an 
overflow into the portion of this area which has, as Engler remarks (Pflan- 
zenw. Afr., i. t. 3), a flora of decidedly West African character. 
The section Adenoclaoxylon is confined to East Africa, where there are 
two endemic species, and to East Central Africa, where there are five 
species, all • endemic. The section Deflersia is more widely spread and 
extends from Yemen and Abyssinia to Natal, with a very distinctive out¬ 
lying group of three nearly allied species in West Central Africa, and 
a solitary, but also very distinctive species in Upper Guinea. One species 
is endemic in North-East Africa, two are endemic in East Africa, and two 
in South-East Africa. The section is unrepresented in East Central Africa 
or in South-West Africa, and there is no species in Lower Guinea. The 
section Trichogyne may almost be said to occupy the area left vacant by 
Deflersia. There is no species in North-East Africa, East Africa, or South- 
East Africa, there is no species in West Central Africa, and the solitary 
species in Upper Guinea occurs just within the south-eastern margin of 
that sub-region. In East Central Africa Trichogyne is represented by four 
species, of which three are endemic, the fourth being an overflow from South- 
West Africa, where it is widely spread. In South-West Africa there is 
