CRYPTODIFFLUGIA COMPRESSA. 53 
expansion. It is not improbable that Hyalosphenia 
wmconspicua G. S. West may represent this species 
(Vol. IT, p. 84). . 
3. Cryptodifflugia eboracensis Wailes. 
(Plate LXII, figs. 1 and 2.) 
Cryptodifiugia eboracensis 
Waites & PENARD in Proc. R. Irish Acad. XX XI, txv (1911), pp. 8, 
15, 24, pl. i, £. 3. 
Brown in Naturalist, 1912 (Oct.), p, 181. 
WAILEs in Jrn. Linn. Soc., Zool. XXXII (1912, Dec.), pp. 124, 133; 
in Naturalist, 1913, p. 146. 
Test small, yellow-brown in colour, transparent, 
smooth, homogeneous, elongated, moderately com- 
pressed ; aperture circular, oblique, without collar or 
invagination; plasma colourless, granular; nucleus 
single, containing a central nucleole; one or two con- 
tractile vesicles usually present; pseudopodia few, 
short, pointed or digitate. 
Length 24-28 1; breadth 15-17 »; thickness 10-15; 
aperture 4—7 » in diameter; nucleus 5 uw in diameter. 
Habitat—Sphagnum. 
ENncLaNnD.—Westmorland ; Goathland, Bransdale, 
and Bolton, Yorkshire; Derbyshire (Brown); Bed- 
fordshire ; Shropshire; Isle of Wight. : 
Watzrs.—N. Wales. 
Scotnanp.—Argyllshire (Brown). 
IreLanp.—Clare Island, Inishturk, Caher Island, and 
mainland, Mayo; Inishbofin, Galway. 
The form of the test is similar to that of Trinema 
euchelys, but otherwise it has the characteristics of 
the genus Oryptodifflugia. The species occurs in the 
Eastern United States and Alaska. 
As with the other members of this genus the animal 
is very shy, and only on one or two occasions have the 
pseudopodia been observed, and even then they may 
not have been fully extended. 
Although never abundant it is not uncommon in the 
localities where it occurs. 
