246 ^' Annandale. 



Corvospoiigilla micramphidiscoides, Weltnek. 

 Potamolepis chartaria, Marshall. 

 Potamolepis leuhnitziae, Marshall. 

 Potamolepis peclnudii, Marshall. 



Sponges of the Tanganyika System. 



Spongilla (Eunapius) nitens, Carter. 

 Sp)ongilla (Euriapius) perrnLvta, Weltner. 

 Corvospongilla höhnii (Hilgendorf), 

 Nudospongilla cuyiningtoni (Kirkpatrick). 

 Nudospongilla inoorei (Evans). 

 Nudospongilla tanganyikae (Evans). 

 Pota7nolepis weltneri, Moore. 



Sponges of Afrioa South of the Limpopo River. 



Spongilla (Eunapius) amhigua, Annandale. 

 Spongilla (Stratospongilla) homhayensis, Carter. 

 Ephydatia ßnviatilis suhsp. capensis, Kirkpatrick. 



Cur knowlodge of the African Spongillidae is still delicient, and there 

 are several important river-systems from which no sponges have as yet 

 been reported. It is, therefore, impossible to divido the Ethiopian Region 

 with any pretence to linality into definite subregions or districts in which 

 different sponge-faunas aetually have been discovered or might bo expected 

 to exist. The foregoing attempt to deal with the known forms geographically 

 is therefore no more than an attempt; but it may have some interest if 

 we pay attention to genera and subgenera rather than species. 



At present representatives of six well-established genera of Spongilli- 

 dae have been found in Africa, including the Palaearctic and southern 

 districts of the Continent. They are : 



Spongilla, 



Pectispongilla, 



Ephydatia, 



Dosilia, 



Tuhella, 



Corvospongilla. 

 To these must be added two provisional genera of somewhat doubtfvd 

 Status, viz. Nudospongilla and Potamolep>is . 



Spongilla, nioreover, is divided into three subgenera, all of which 

 have been recordod from Africa — Euspongilla, Eunapius and Stratospongilla. 



