DIFPLUGIA PENAEDI. 15 



(1893), pp. 1071, 1072; in Arch. Sci. nat. (3) XXVI 

 (1891), p. 148; in Eev. Suisse Zool. VII, 1 (1899), p. 

 35, t. ii, ff. 6-8 ; Faune Ehiz. Leman (1902), p. 245, ff. 

 1-7 (p. 246); and in Arch. Protist. II (1903), p. 256; 

 A.VEEiNTZE\r in Ber. Siisswass. nat. Ges. St. Petersb. I 

 (1901), p. 211; in Trudui S.-Peterb. Obshch. XXXVI 

 (1906), 2, p. 203; and in Zool. Anzeig. XXXI (1907), 

 pp. 244, 308 ; Lageeheim in Forh. G-eol. Foren. Stockholm, 

 XXIII (1901), p. 511; FoEEL Le Leman (1904), III, p. 

 138 ; ScHODTKDEN in Ann. Biol. Lacustre, I, 3 (1906), pp. 

 344, 347; Thiebaud & Favke in Ann. Biol. Lacustre, I, 1 

 (1906), pp. 70, 76 ; ZsCHOKKE in Arch. Hydrobiol. II, 1 

 (1907), p. 3. 

 (Non Difflugia fallax EnEENBERGin Abh. Akad. Wiss. Berlin, 

 1871 (1872), p. 252, t. ii, 1, f. 19.) 



Test short, with, a semi-circular dome, and wider in 

 proportion to the length than D. oblonga var. lacvstru, 



« / 



Fia. 41. — Difflugia proteiformis Ehrenb. (pars). ? = D. Penardi. After 

 Ehrenberg Zoc-cii. (reduced), x 250. 



which in some respects it resembles ; tapering convexly 

 downwards from the crown to the truncated mouth ; 

 thin in texture ; usually studded with diatom-frustules, 

 but frequently in crusted with minute sand-grains. 

 Pseudopodia few, digitate ; nucleus normal. 



Dimensions ; Length 60-85 in ; breadth about 30 fi. 



Amongst Sphagmim in boggy ground. Cheshire 

 and Carnarvonshire. Summit of Ben Ledi, Scotland 

 (W. Evans). Killough, Co. Wicklow, Ireland (/. 

 Hopkinson) . ^ 



The test of this small species is semi-transparent, 

 and from the presence of diatoms in its structure, 

 might (at any rate as to the larger forms) be mistaken 

 for D. bacillifera Penard. It, however, does not possess 



