]^58 MR. G. H. WAILES OK FRESHWATER 



This \ariety is widely distributed, and is referred to in the report on the 

 Khizopoda of Clare Island *. 



The torulose neck and nsimlly larger size distinguish it from N. tuhulata, 



Brown. 



Length 77-100 /ju. 



Dutrilmtion. England * ; Ireland * ; Peru ; Australia (Penard) t ; 

 Colorado, U.S.A. 



Nebela militaris, Penard. 



Not uncommon. Length 68-80//,. 



N. scutellata, Wailes. (PI. 12. fig. 43.) 



This species, first described in the present Journal, occurs here nume- 

 rously but of rather small size ; the tests, as also those of N. tropica, are 

 remarkable for the presence of small circular discs, which are mingled with 

 the rectangular plates, usually the sole constituents of the test ; the discs vary 

 in number from none to sixty or more in a single test, few tests having less 

 than a dozen of them ; the square plates measured from 6-7 /x in width ; 

 occasionally a few diatom frustules are also present. Several living indi- 

 viduals wore seen, but none were active ; the plasma was of the normal type 

 and crowded with food-particles ; the nucleus is small, about 7 yu, in diameter, 

 and contains several ill-defined nucleoles. No tests were found in which 

 small covering-plates are present, such as occur in the United States. 



Length 105-120 /a; one abnormal individual measured, length 174 /i: 

 breadth 120 /i ; aperture 35/a. 

 Distrihulion. United States. 



N. TINCTA (Leidy), Aicerinzew. 

 Rare. Length 100 /a. 



N. TROPICA, Wailes. ( Vide p. 140.) (PI. 12. fig. 44.) 



Not uncommon : as in the case of A", scutella the tests were remarkable for 

 having numerous circular discs mingled with the quadrangular scales ; in 

 other respects they were quite typical. It is worthy of note that these two 

 recently described species, which in other localities are characterised by the 

 rectangular scales which form the tests, should in this locality occur in associ- 

 ation, and both have circular discs mingled with the square scales. 



Length 70-75 /j,. 



Distribution. Borneo ; Peru. 



* Wailes & Penard in Proc. Roy. Irish Acad, vol, xxxi. (1911). Clare Island Survey, 

 pt. 65, pp. 48, 50, pi. 5. fig. 28 fl, b (1911). 



t Brit. Antarctic Exped., Biol. vol. i. pt. 6 (1911). 



