142 BRITISH FRESHWATER RHIZOPODA. 



mass, occupying the centre the mass decreasing in 

 width downwards and widening out at the mouth; 

 nucleus normally situated ; pseudopodia thin and 

 fairly numerous. 



Dimensions : Length 120-135 ft, breadth at widest 

 part 90-100 /x. 



In Sphagnum, in sub-alpine districts, rare. Near 

 Towyn, Merionethshire, 1905 ; the Sychnant Pass 

 and Llyn Idwal, Carnarvonshire. Moel Siabod, N. 

 Wales ; Killough and Calary Bog, Co. Wicklow r , Ireland 

 (/. Hopkmson). Loch Ness (D. J. Scourfield) ; Aber- 

 foyle and Ben Ledi (W. Evans), Scotland. 



This species, though relatively large, is smaller than 

 H. sphagni Leidy ; but it is not likely to be confounded 

 with that species, on account not merely of its vinous 

 or rose-coloured test, but also of the character of the 

 mouth, the corners of which, in perfect examples, are 

 obtusely angular, with the lips yellow or lightish 

 brown. Their edges are closely approximate ; and in 

 narrow lateral view the mouth is represented by a 

 deep angular notch. 



4. Heleopera lata sp. nov. 



(Plate XXX, fig. 3.) 



Test broadly ovoid, its vertical dimension exceeding 

 but little the diameter in its broadest part (immediately 

 below the crown) ; the crown forming a wide semi- 

 circle, and the lateral margins descending in straight 

 lines downwards to the obtusely- angular corners of 

 the mouth. The mouth proportionately broad; its 

 outline slightly convex; and structurally resembling 

 very closely that of the preceding species, the lips, 

 which are thin and closely approximated, having a 

 yellowish or lightish - brown margin, well defined. 

 Colour of the test a deep vinous red, or purplish, and 

 with a surfacing of amorphous scales, closely com- 

 pacted, but not overlapping ; the crown covered rather 

 sparsely with variously-sized sand-grains. Plasma and 



