356 



H. ?I. Anderson — Notes on Indian Tiotifers. 



[No. 4, 



36. Metopidu solidur, Gosse. 

 Very common, I found it, an one occasion, tooming in water 

 whicli had been standing for many days, and in wliich Parainwcia swarm- 

 ed. 



37. Metopidia triptera, Ehi'onberg. 



Common. 



38. Metopidia toequata, n. sp., PI. XXI, Figs. 9 & 9a. 

 Tlie most striking characteristic is the stippling of tlie shell, which 

 is very slight, except around the anterior opening, to which it gives the 

 appearance of a collar. It differs from M. solidus, also, in being much 

 more oval in shape, in having a larger anterior opening, and in being 

 more deeply incised on the anterior ventral surface. It differs from 

 M. lepadella in its size, it is more than twice as big, and in its flatness, 

 in which it resembles M. solidus, and in the shape of the openings 

 both in front and behind. Length tto"- 



39. Metopidia angulata, n. sp., PI. XXI, Fig. 10. 



This pretty little form has a very distinctive shell. Seen dorsally 

 the lorica curves outwards from both the anterior and posterior openings 

 to meet in an angular point, tho hinder curve being shorter than the front 

 one. A stippled collar is also very evident, as are the two horns. Two 

 contractile vesicles were seen in active operation. I did not see the 

 frontal hook, so that possibly the species is not a Metopidia. The two 

 eyes were small and inconspicuous. Length of lorica .jl,/'. 



Family XVII, Pterodinadse. 



40. Pterodina intermedia, n. sp,, PI. XXI, Fig, 11. 

 The lorica is inflexible, nearly circular, and where P. mucronata has 

 a sharp point this species has a semicircular projection. Slight uneven- 

 ness of frontal outline occurs in P. patina, but in this there is a very 

 distinct and regular projection. The surface is stippled and bosses are 

 visible though not conspicuous. The gastric glands are long, broad, 

 and rounded. Foliation is conspicuous. Length of lorica xJu"- 



41. Pterodina, n. sp. ? 

 Tho peculiarity of this species (?) is its internal organization. Only 

 one specimen was seen. It resembled P. patina in shape, &c., but it had 

 only one gastinc gland on tho right side and this sloped downwards 



