PONTIGULASIA VAS. 61 



were no isolated quartz-grains on any part of the 

 structure, which was smooth, and, like the incrusted 

 Difflugix, opaque. Penard, in ' Faune Rhiz. Leman,' 

 figures the diaphragm with four perforations. 



2. Pontigulasia bryophila Penard. 



(PL XXIII, fig. 2.) 



Funtigulasia hryophila Penaed Faune Rhiz. Leman (1902), 

 p. 324, ff. 1-4; AvEEiNTZEV in Tradui S.-Peterb. Obshch. 

 XXXVI (1906), p. 168; ScHOUTEDEN in Ann. Biol. 

 Laciistre, I, 3 (1906), p. 838. 



Smaller and of more graceful proportions than the 

 preceding ; body of the test oval, not compressed ; the 

 constriction deep, sometimes fortified with quartz- 

 grains of large size ; the neck, from a slight inflation, 

 converging in straight lines to the truncated mouth. 

 G-eneral structure as in P. vas, with, however, an 

 admixture of amorphous (siliceous ?) scales on the 

 surface, or these scales exclusively. Pseudopodia as in 

 the preceding species. 



Dimensions : Length 120-135 ju. ; breadth 70 fju. 



In wet Sphagnum, near Towyn, N. Wales, 1905. 

 Killough, Co. Wicklow, Ireland, 1908 (/. Hoplilnsnn). 



This appears to be a rarer form than the preceding. 

 The Towyn locality, and more recently that in Co. 

 Wicklow, are the only ones where we can say with 

 reasonable certainty that it has been found in this 

 country. The limits which separate the species from 

 P vas are not great— it may be that the two are 

 connected by intermediate forms, but the number of 

 individuals found do not admit of any confident opinion 

 being expressed upon the point. P. bri/ophila, how- 

 ever, may be distinguished from its neighbour (follow- 

 ing Penard's description) by its elliptic, never rotund 

 or sub-rotund body. It may be remarked that the 

 general outline of both this and the preceding species, 

 apart from the constriction which is characteristic of 



