DIPFLUGIA UKCEOLATA. 43 



single stone flake of greater width than the spine at 

 its point of attachment. 



17. Difflugia amphoralis sp. no v.* 

 (Plate XXI, fig. 13.) 



Difflugia amphora Leidy (pars) in Pr. Acad. Philad. 1874^ 

 p. 79 ; Lageeheim ? in Fdrh. Geol. Foren. Stockholm, 

 XXIII (1891), p. 509; AvEEiNTZEV (pars) in Trudui 

 S.-Peterb. Obshcli. XXXVI (1906), 2, p. 184; Schou- 

 TEDEN in Ann. Biol. Lacustre, I, 3 (1906), pp. 341, 345, f. 

 15; Schneider? in Arch. Biontol. II, 1 (1908), p. 58. 



Difflugia urceolata Leidy (pars) Freshw. Rhiz. IST. Amer. 

 (1879), p. 106, t. xiv, f. 8 ? ; t. xvi, f. 33. 



Difflugia urceolata var. amphora Leidy (pars), Freshw. 

 Khiz. N. Amer. (1879), t. xvi, f. 34. 



(Non Difflugia amphora Eheenbeeg in Abh. Akad. Wiss. 

 Berlin, 1871 (1872), p. 248.) 



Smaller than Difflugia, urceolata, and differing from 

 it in having the crown neither convex nor spined, taut 

 pointed like a Gothic arch; the mouth with an ex- 

 panded taut not upturned rim below the constricted 

 neck. The test composed of chitinous material, sur- 

 faced with amorphous (? siliceous) scales, but few 

 sand-grains ; semitransparent. The plasma-body not 

 connected with the sides but attached to the fundus 

 by threads of ectoplasm. Nucleus single ; pseudo- 

 podia numerous, simple or digitate. 



Dimensions: Length about 115 /a; greatest width 

 70 /x.; width at constriction of neck 40 /a. 



In marshy places amongst Spliagnum, near Criccieth, 

 Carnarvonshire, August, 1904. 



Difflugia amphoralis is distinct from D. amphora 

 Penard. In the latter (not observed in Britain) the 

 mouth has a peculiar chitinous rim with a wavy and 

 sharply-cut outline. 



[Differing from Difflugia urceolata in having only a 

 single nucleus, as well as in the nature of the test and 



* [Difflugia urceolata var. amphora var., nov. .- Cash, MS.] 



