406 Transactions of the Society. 



Daday from Paraguay in South America (3), and by Dr. Levander 

 in Finland, under the name of G. appendiculata (13). The size of 

 my specimen is 254 /i (y^ Q in.), inclusive of toes. Cathypna un- 

 gulata was described by Gosse, but is very rare in England. I 

 have found it only once at Woking, and it has been reported 

 from America by Professor Jennings (9), and from Germany by 

 Bilfinger (1). This is perhaps the largest known Cathypna, 

 measuring 258 /n the lorica alone, the toes 104 //,, giving a total 

 length of 362 [x (^ in.). The toes are narrow and long, and 

 shouldered on the outer side at one-third of their length, producing 

 very long, acute claws. As Mr. Gosse has not published a com- 

 plete figure of this animal in the "Supplement" to the Mono- 

 graph (7), I give here a drawing of the lorica made by Mr. F. E. 

 Dixon-Nuttall, by means of which it will be more readily re- 

 cognised (PI. XV. fig. 1). 



After returning to the north bank of the Zambesi, I walked 

 some little distance along the stream, which is here overgrown with 

 reeds and other vegetation. In a small bay of the river where 

 there was no perceptible flow of water I rilled a bottle with con- 

 densed water which looked very rich in Desmids and Eotifera. 

 From this I afterwards obtained the following 24 species — 



Limmias ceratophylli Schrank. 



Actinurus neptunius Ehrbg. 



Synchceta oblonga Ehrbg. 



Triarthra longiseta Ehrbg. • . 



Diglena forcipata Ehrbg. 



Rattulus pusillus Lauterborn. 



„ imicosus Stokes. 

 Dinocharis tetractis Ehrbg. 

 Polychcetus Collinsi Gosse. 

 Diaschiza gibba Ehrbg. 

 Salpina eustala Gosse. 

 Euchlanis oropha Gosse. 

 Cathypna lunct Ehrbg. 



„ leontina Turner. 



„ ungulata Gosse. 

 Monostyla lunaris Ehrbg. 



„ bulla Gosse. 

 Mctopidia solidus Gosse. 

 Pterodina patina Ehrbg. 

 Pompholyx complanata Gosse. 



Brachionus angularis var. caudatus Barrois and Daday. 

 Anuroza cochlearis var. hispida Lauterborn. 



„ „ (forma robusta) Gosse-Lauterborn. 



aculeata var. valga Ehrbg. 



