-j4 BRITISH FRESHWATER EHIZOPODA. 



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

 occur in some localities ; at Goathland, Yorkshire, a 

 large one was seen measuring 150 /a in length and 115jU, 

 in breadth. 



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

 PL XLIII, fig. 1.) 



Assulina scandinavica 



Penabd in Mem. Soc. Geneve, XXXI, ], ii (1890), pp. 176-177, pi. ix, 



ff. 1-13. 

 Assidina seminulum var. scandinavica 



Pbnaed raune Rhiz. Lbman (1902), p. 619 ; in Brit. Antarct. Exped. 



I, 6(1911), p. 225. 

 Evans in Proc. R. Phys. Soc. Edinb. XVII (1907), table 1. 

 Wailbs & Pbnaed in Proo. E,. Irish Acad. XXXI, lxv (1911), 



pp. 15, 22. 

 Wailbs 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 80-120 ju,; breadth 70-110 /x; aperture 15- 

 30 /a; scales 9-12 yu, in greater diameter. 



Habitat. — Sphagnum in upland districts. 



England. — The moors in the North Eiding 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; 

 Galway. 



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. 



