84 BRITISH FRESHWATER RHIZOPODA. 



Ber. Siisswass. nat. Ges. St. Petersb. I (1901), p. 211 ; 

 LANoLehrb. vergl. Anat., ed. 2, Prot. (1901), f . 3 b (p. 7) ; 

 Haetog Prot. in Cambi-. Nat. Hist. I (1906), f. 10b (p. 55). 



Test shorter and broader than that of the preceding 

 species, tapering from the convex or semi-circular 

 crown evenly downwards to the truncated mouth ; com- 

 pressed round the margin (more than in the central 

 portion), and composed of chitinous membrane, colour- 

 less and transparent. Plasma, as in the preceding, 

 attached to the interior of the test by thread-like pro- 

 longations of its own substance. Pseudopodia few in 

 number, in general character digitate, not branched. 

 Nucleus as in the preceding species. 



Dimensions : Length 75 fi ; breadth 60 /x. 



Pig. 80. — A variety of Hyalosphenia cuneata. Cooket Moss, Giggieswick, 

 W. Yorks. X 310. From a drawing by G. S. West. 



In Sphagnuvi ; reported by Prof. Gr. S. West from 

 Giggleswick, West Yorkshire ; and also from the 

 North of Ireland. Loch Ness, Scotland (/. Murray). 



This is a rare species. It differs from H. papilio 

 in the marginal compression of the test (the margin 

 being obtuse), in its broader crown, and in the absence 

 of lateral pores. 



3. Hyalosphenia inconspicua G. S. West. 



(Plate XXXI, figs. 5 and 6.) 



Hyalosphenia inconsjjicua G. S. West in Jrn. Linn. Soc, 

 ZooL XXIX (1903), p. 115, t. xiii, ff. 7-11; Aveeintzev 

 in Trudui S.-Peterb. Obslicli. XXXVI (1906), 2, p. 228 ; 

 ScHOUTEDEN in Ann. Biol. Lacustre, I, 3 (1906), p. 352. 



