Maskell. — On Freshwater Infusona. 61 



Genus Dendromonas, 

 Dendromonas virgaria, Weisse. Wainui. 

 Genus Anthophysa. 

 Anthophysa socialis, De From. Wellington ; Wainui. 

 Anthophysa vegetans, Mliller. Wellington. 



Genus Goniomonas. 

 Goniomo7ias truncata, Fres. Wellington. 

 Genus Rhipidodendron. 

 Rhipidodendron huxleyi, Kent. Wainui. 

 This is a peculiar and interesting form, and it is remarkable 

 that the only other recorded specimens are from Dartmoor, in 

 England. Curiously, also, the Wainui infusorian is accom- 

 panied, as m England, by the followmg species, Spongomonas 

 sacculus. 



Genus Spongomonas, 



Spongomonas discus, Stein. Wainui. 



Spongomonas sacculus, S. Kent. Wainui. 



The occurrence of this curious monad with Rhipidodendron, 

 here, as at Dartmoor in England, seems to suggest possible 

 connection between the two. Neither of the two appears to 

 have been recorded from any other locality. The character of 

 the zoocytium, or common gelatinous granuliferous mass en- 

 closing the animalcules, seems scarcely to vary in the two 

 genera ; and the main difference would appear to lie in the 

 fact that the animalcules of Rhipidodendron inhabit separately 

 the tubes of a branching zoocytium, those of Spongomonas living 

 together in the common mass. Time has not yet permitted a 

 continuous investigation of the two forms, which might not 

 impossibly be found, as hinted above, to be in some way 

 connected. 



Genus Heteromita. 



Heteromita lens, Miiller. Wellington. 



Order. Flagellata-Discostomata, or Choano-Flagellata. 

 (The " collared " monads.) 



Genus Monosiga. 



Monosiga consociata, Kent. Wainui. Plate EEI., fig. 2. 



A figure of this species is given to illustrate the peculiar 

 " collar " of the order. 



Genus Salpingseca. 



SalpingcBca amphoridium, James-Clark. Wainui, Karori, 

 Porirua. 



