408 Transactions of the Society. 



which I could see some Rotifers swimming about, and which was 

 afterwards found to contain the following 16 species — 



Conochiloides (conochilus) natans Seligo-Hlava. 

 Triarthra longiseta Ehrbg. Very abundant. 

 Copeus Ehrenbergi Ehrbg. 

 Diurella stylata Eyferth. 

 Dinocharis tetractis Ehrbg. 

 Enchlanis triquetra Ehrbg. 



„ oropha Gosse. 

 Distyla fiexilis Gosse. 

 Monostyla bulla Gosse. 

 Plmsoma lenticularc Herrick. 

 Brachionus BaJceri Ehrbg. 



„ angidaris Gosse. 



Amur ma aculeata var. valga Ehrbg. 



„ „ var. curvicornis Ehrbg. 



„ cochlearis (forma micracantha) Gosse-Lauterborn. 



„ „ var. tecta Gosse. 



This water also contains numerous Desmids and Diatoms, and 

 Mr. William West has enumerated 24 species in one slide of the 

 material. It is worth noting that a railway water-tank in South 

 Africa, and probably also elsewhere, can contain such an abundance 

 of pond life. I afterwards learned that this water was pumped up 

 from the Hunyani river. 



Among the above Eotifers are two rare forms : Conochiloides 

 natans, first discovered by Seligo (17) in 1900, in the Stuhmer 

 Lakes near Danzig, and afterwards found by M. Voigt (23) near 

 Ploen, and by St. Hlava (5) in Bohemia. Pkesoma lenticulare is 

 very rare ; first found in Lake Erie, in America, by Vorce in 1882, 

 and named by Herrick in 1885 (4), it has been recorded by 

 Jaegerskiold, 1892, in Sweden (8), by Wierzejsky, 1892, in Galicia 

 (24), by Levander (13) and Stenroos (18), 1895, in Finland, and by 

 John Hood, 1894, in Ireland (6), who has published the best figure 

 of this species. It is therefore remarkable to have obtained these 

 two rare forms from a railway tank in the interior of South Africa. 



During the further progress of our journey, we stayed six hours 

 at Salisbury, and half a day at Umtali, but I had no opportunity 

 of collecting at those places. The following day, September 17, 

 we reached Beira, and after a very hospitable reception by the 

 Portuguese Governor and authorities, and luncheon in the Custom 

 House buildings, we embarked on board the ' Durham Castle,' 

 which was waiting for us in the harbour, and brought us safely 

 home via the East Coast of Africa, with stoppages at Mozambique, 

 Mombasa, and Egypt. 



