234 ' Transactions of the Society. 



specks like air-globules, this being their usual appearance. The eyes 

 seem to be very rarely everted, but I saw it so clearly as to make 

 me certain of it. 



Notommata naias Ehrbg. — The description of this answers to 

 one I found very often in the marshes just above Maritzburg. It 

 seemed common in 1898. 



Copeus. — One species, fairly common in the marsh above Maritz- 

 burg, seemed to agree with the description given of C. spicatus 

 Hudson, except that in this case the toes were always straight and 

 the lumbar antennae were different, as they had a brush of setae. It 

 was transparent, and its stomach full of desmids, &c, and had no 

 mucus round it. I have not yet seen it down here on the coast. [The 

 curved toes as depicted by Dr. Hudson, is not a normal condition ; the 

 toes are usually slightly decurved. — C. F. E.] 



Copeus Ehrenlergii Ehrbg. — I feel confident that this is the 

 same as the one I find in small pools of clear water among the rocks 

 in the Equeefa river, always on threads of Spirogyra. I saw it in 

 November 1898, and again this year, 1900, in February. It breeds 

 readily in a bottle if supplied with Spirogyra, and the sucked threads 

 taken away. The eggs are smooth, and are bound on to the cells of 

 Spirogyra by its own thread. This is systematically and carefully 

 done, the finer species of Spirogyra being preferred. The young from 

 their birth are enveloped always with a coating of mucus, which is 

 clear and transparent then, becoming dirty looking and darker as it 

 grows older and bigger. They breed in considerable numbers on 

 suitable Spirogyra, the collapsed state of the cells bearing witness to 

 the presence of this Copeus, which once seen can easily be detected a 

 second time, looking as they do like green bits of jelly, their stomach 

 being full of the green food. This one nibbles through the cell-wall, 

 the opening or perforation being easily seen, and then sucks out the 

 contents rapidly. The one mentioned above, found near Maritzburg, 

 was seen to contain small but entire desmids and diatoms. C. Ehren- 

 lergii will feed on the cells of Zygnema also, but refuses (Edogonium. 



Proales decipiens Ehrbg. — One answering to the description 

 of this was found in July 1898, near Maritzburg, generally inside 

 the empty cases of Entomostraca. The crystalline lens was very 

 conspicuous. 



Proales petromyzon Ehrbg. — I found one specimen along the 

 edges of the Umzinto river, which appears to be this species, in. 

 December 1899, under the shade of grass ; it was free. 



Furcularia longiseta Ehrbg. — In the same spot as the Proales 

 above, I found a rotifer which was evidently F. longiseta, in January 

 1900 ; also in pools, September 1900, among rocks. 



Eosphora aurita Ehrbg. — The description and illustration of 

 plate xvii. fig. 10 (not 17), Hudson and Gosse, tally with one I 

 found in Maritzburg in July 1898, of which there were only a few 

 specimens. I have no doubt whatever about it. 



