54 BRITISH FRESHWATER RHIZOPODA. 



Tests which are pyriform in broad view (PI. XLI, fig. 4) 

 occur in some localities ; at Goathland, Yorkshire, a 

 large one was seen measuring 1 50 /x in length and 11 5 /x 

 in breadth. 



Var. scandinavica Penard, (PL XLI, fig. 5; 

 PL XLIII, fig. 1.) 



Assulina scandinavica 



PENARD in Mem. Soc. Geneve, XXXI, 1, n (1890), pp. 176-1 77, pi. ix, 



ff. 1-13. 



Assulina seminulum var. scandinavica 

 PENARD Fatme Rhiz. LEMAN (1902), p. 519 ; in Brit. Antarct. Exped. 



I, 6 (1911), p. 225. 



EVANS in Proc. R. Phys. Soc. Edinb. XYII (1907), table 1. 

 WAILES & PENARD in Proc. R. Irish Acad. XXXI, LXV (1911), 



pp. 15, 22. 



WAILES in Scott. Natur. 1912, p. 60. 

 BROWN in Scott. Natur. 1913, p. 208. 



Test usually larger than in the type, brown or colour- 

 less, ovoid or sub-circular, composed of oval or rarely 

 circular scales regularly imbricated in alternating 

 longitudinal rows ; plasma and pseudopodia normal. 



Length 80-1 20 p,; breadth 70-1 10 /x; aperture 15- 

 30 /x; scales 9-1 2 /x in greater diameter. 



Habitat. Sphagnum in upland districts. 



ENGLAND. The moors in the North Riding of York- 

 shire, 800 to 1000 feet. 



WALES. Bettws - y - Coed, Carnarvonshire (Hopk. 

 coll.). 



SCOTLAND. Shetlands ; Forth area (Evans) : Dum- 

 friesshire. 



IRELAND. Clare Island, Mayo, 750 to 1000 feet; 

 Gal way. 



Although far less common than the type, this variety 

 is probably widely distributed in the upland districts 

 of the British Isles. 



The scales, of the test are always easily distinguish- 

 able and never hidden by the brown chitinous cement 

 as is usually the case in the tests of the typical A. 

 seminulum. 



