NEBELA TUBULOSA. Ill 



These plates are distinctly seen under a power of 

 about 400-500 diameters. 



The occurrence of N. tubulosa seems to be sporadic. 

 It is not often met with, but where it occurs it is 

 usually plentiful. Such was the case in the Sychnant 

 Pass, and at Llyn Idwal. It occurred in the spring 

 of 1904 in great abundance in Sphagnum gathered at 

 Dunham during the preceding summer, and kept 

 through the winter in a garden frame. 



8. Nebela equicalceus Leidy.* 



(Fig. 94.) 



Difflugia (Nebela) equicalceus LEIDY in Pr. Acad. Philad. 



1874, p. 156. 

 Nebela equicalceus LEIDY in Pr. Acad. Philad. 1876, p. 118, 



ff. 12, 13. 

 Nebela hippocrepis LEIDY (pars) Freshw. Rliiz. N. Amer. 



(1879), p. 156, t. xxv, ff. 9-14; HITCHCOCK Synops. Freshw. 



Rhiz. (1881), p. 22 ; TARANEK in Sitzber. bohm. Ges. Wiss. 



1881 (1882), p. 231; and in Abh. bohm. Ges. Wiss. (6) 



XI (1882), 8, p. 41 ; (cf. BLOCHMANN Mikr. Thierw. Suss- 



wass. ed. 2 (1895), p. 17;) EYFERTH Naturgesch. mikr. 



Siisswass. ed. 3 (1900), p. 265; G. S. WEST in Jrn. Linn. 



Soc., Zool. XXVIII (1901), p. 323 ; PENARD Faune Rhiz. 



Leman (1902), p. 575, f. 6 (p. 572); AVERINTZEV in 



Trudui S.-Peterb. Obshch. XXXVI (1906), p. 237 ; 



SCHOUTEDEN in Ann. Biol. Lacustre, I, 3 (1906), pp. 353, 



355. 



Test in broad view pyriform, with a thick, blunt, 

 solid carina extending round the convex crown, down 

 the lateral borders, and ending in digitate processes 

 which project downwards into the cavity ; the mouth 

 transversely oval, its outline convex. Body of the 

 test Avith a surfacing of transparent circular discs ; its 

 margins pale straw-coloured, and homogeneous. The 

 protoplasm, in colour and other respects as in N. collaris 

 and its allies ; nucleus normal ; pseudopodia as in N. 

 carinata. 



* [Nelela hippocrepis Leidy : CASH, MS.] 



