Rotifra of New Zealand. Bg J. Murray. 579 



The rosette round the mouth is like that of R. longirostris and 

 H. rceperi Milne. The jaw has a thin border, and the teeth are 

 nearly central. The number of segments in the foot was not 

 ascertained. 



Though this animal has not been seen to feed, I describe it for 

 the following reasons : it is clearly a Rotifer, being 3-toed and vivi- 

 parous. The corona rarely has anything distinctive in this genus. 

 The lack of eyes, the rosette, and the sordid trunk show the species 

 to be very near R. longirostris. From that it is distinguished by the 

 smaller size, and relatively shorter rostrum, rump, foot, and spurs. 

 The spurs are not 2-jointed (as in R. tarcligradus and R. longirostris). 



Habitat. — Nun's Veil, Mount Cook district ; elevation 5000 to 

 6000 ft. (coll. Dr. Mackay). Also in the Australian Alps, about the 

 same elevation ; spurs slightly different. 



Habrotrocha perforata (Murray). 



One of the commonest species in tropical and sub-tropical 

 countries, it has rarely been found in temperate regions, though 

 Heinis recently found it in Switzerland. In New Zealand it only 

 occurred sparingly in the moist bush of the west coast, in both 

 islands. 



Habrotrocha lata (Bryce). 



Rarely obtained in this country except among Sphagnum, in 

 New Zealand it occurred among tree mosses on the West Coast. 



'o 



Habrotrocha pulchra (Murray). 



With the last, among tree mosses on the west coast. No doubt 

 in that dripping climate the tree mosses are about as constantly 

 moist as Sphagnum is in Britain. 



Habrotrocha sp. (?). Plate XVII. figs. lOa-lOc. 



Specific characters. — Of moderate size, reddish, narrow ; teeth 

 5/4; antenna short; trunk deeply plicate; foot 3-jointed; spurs 

 narrow, acute, divergent, with wide, straight interspace. 



Length 350 ll, width of trunk 75 ll, neck 50 ll, length of spur 

 12 ll, jaw 24 ll. Neck with lateral prominences. Top border of 

 jaw continued beyond lateral border as a sort of incomplete loop. 

 Not seen feeding. 



By the number of teeth this might be Hilgendorp's quadrideus. 

 That species is not seen so described that its genus can be known. 

 It is said to have a long foot, but it is figured short. Our animal 

 has a short foot. 



