238 Transactions of the Society. 



Gathypna luna Ehrbg. — There appear to be two species of 

 Gathypna here, one of which is evidently C. luna ; the other is smaller 

 and more common, and is often to be found in water lying in small 

 pools which are on the point of drying up, the water beginning to- 

 smell badly owing to decaying vegetable matter. 



Monostyla. — I have seen two or three species of this genus, but 

 do not seem to have made any notes as to identification. 



Metopidia. — I think I have seen several species, but have not 

 paid them much attention. 



Metopidia solidus Gosse. — This was found near Maritzburg in 

 a small garden pond full of Nitella, and also along edges of the river 

 Umzinto. 



Metopidia acuminata Ehrbg. — I think I have seen this also 

 frequently, and also another one, rather common, that has three 

 wings after the manner of M. triptera, but it is evidently not that. 



Pterodina. — There are four species in Natal that I have seen. 

 One appears to be P. patina, which is common both near Maritzburg 

 and on the coast ; another that draws in its sides, as depicted in 

 P. valvata, but its lorica is rough and covered with raised points, 

 not smooth as described by Hudson and Gosse. It is rare, I think, 

 as I have only seen a few specimens taken from a very small clear 

 pool in the rocks of the Equeefa, along with some Gopeus Ehren- 

 bergii. [According to the mounted specimen sent this is P. intermedia 

 Anderson. — C. F. E.] 



Pterodina reflexa Gosse. — Only one or two specimens of this 

 were found near Maritzburg, June or July 1899. It seems to be 

 very rare here. 



The fourth Pterodina is one very much larger than the others, 

 and measures §^ in. across. The lorica is nearly circular, slightly 

 roughened and transparent, and has five bosses on each side, but is 

 not stippled round the edge as in P. patina. A distinct feature of 

 its internal organisation is what seems to be a long branching yolk 

 gland. (See plate VI.) [This is P. trilobata Shephard.— C. F. K.] 



Brachionus BaJceri Ehrbg. — CJp to September 1900, I had 

 not seen any other species of Brachionus except B. militaris. In 

 company with a companion, Mr. Harcourt Tyrrell, I found in Sep- 

 tember what appears to be B. Baheri. Several specimens were 

 obtained from small shallow pools on the rocky portion of the beds 

 of the river Umzinto and its tributary the Equeefa. In each case 

 the water was shallow, sometimes extremely so. Under examination 

 it was seen that the two large lateral spines behind were distinctly 

 flexible, and not fixed and hard as in B. militaris. It is evidently 

 rare about here. 



Brachionus militaris Ehrbg. — This agrees with the description 

 and illustration given by Hudson and Gosse in the Supplement. The 

 thread or " anchoring cable " mentioned by Hudson and Gosse is 

 easy to see as it rotates after the manuer of Synchteta tremula. It 



