20 BRITISH FRESHWATEIt RHIZOPODA. 



6 denticulated scales; plasma colourless and containing 

 few opaque granules ; nucleus placed posteriorly and 

 containing a central nucleole ; pseudopodia extremely 

 fine. 



Length 33-70 ju, ; diameter 12-23 /a; aperture 

 6-12 ju,; scales 4'5-9'5/x in length and 2'5-6'6/u, in 

 breadth; spines 10-15 ju, in length. 



Habitat. — Mosses and sphagnum. 



England. — Westmorland and Lancashire {Brown) ; 

 N. Yorkshire; Sheffield district, "W. Yorkshire (Bronm) ; 

 Cheshire (Cash) ; Shropshire ; Bedfordshire ; Essex 

 {Scourfield) ; Isle of "Wight. 



Wales. — Sychnant Pass, Carnarvonshire (Gash). 



Scotland. — Orkneys; Harris, Outer Hebrides (West); 

 Inverness-shire, Elginshire, Aberdeenshire, Argyll- 

 shire, Perthshire, and Wigtownshire (Broivn). 

 , lRii;r,AND. — Donegal; Clare Island, Inisturk, Caher 

 Island, and Belclare, Mayo ; Inishbofin, Galway ; 

 Wicklow (Eopl:). 



Uuglypha cristata is probably generally distributed, 

 but it never occurs very numerously, and this fact 

 together with its inconspicuousness (its length usually 

 ranging between 40 and 55 fi) may account for the 

 paucity of records. Active individuals are rarely 

 seen. Glabrous individuals occasionally occur. 



The species is peculiar among the Eugl'ijpliss, in 

 collecting the supply of reserve scales around the 

 exterior of the aperture instead of within the test ; 

 this may be due to the restricted volume of the test 

 compared to the area of its surface. 



Var. major Wailes. (PI. XXXV, fig. 7.) 



Euglypha cristata 



Leidy (pars) Fresliw. Rlnz. N. Amer. (1879), p. 219, pi. xxxvii, f. 1. 

 JSuglyphii cristata var. major 



Wailes and Penakd in Proc. R. Irish Acad. XXXI, lxv (1911), 



pp. 40 (note), fi2, 

 Wailes in Scott. Natur. 1912, pp. 61, 63-04 ; in Jrn. Linn. Soc, 

 Zool. XXXII (1912), pp. 125, 144, 146-147, pi. xii, f. 31. 



