PONTIGTJLASIA ELISA. 



161 



[(p. 64) 4. Pontigulasia elisa (Penard) Schouteden. 

 (Figs. 107-109.) 



Difflugia elisa Penaed in Arch. Sci. nat. (3) XXIX (1893), 



p. 177, t. iii, f. 7. 

 Pontigulasia incisa Rhumbler in Zeits. wiss. Zool. LXI, 1 



(1895), p. 105, t. iv, ff. 5, 22-25 ; Penaed Faune Ehiz. 



Leman (1902), p. 315, ff. 1-6; Aveeintzev in Trudui 



S.-Peterb. Obslich. XXXVI (1906), 2, p. 169. 

 Pontigulasia elisa Schoutbdbn in Ann. Biol. Lacustre I, 3 



(1906), p. 345 (note). 



107 



108 



109 



Figs. 107-109. — Pontigulasia elisa .- 107, lateral view ; 108, dorsal 

 view; 109, pseudopodia with sand-grains embedded. After 

 Ehumbler {loc. cii.). x 200. 



Test pyriform laterally, in transverse section oval 

 but becoming more nearly circular towards the aperture; 

 covered with sand-grains, diatoms, etc. ; the constric- 

 tion, about two-thirds from the crown, marked exter- 

 nally by a deep notch extending about half way across 

 it in broad view, being the line of attachment of each 

 end of the diaphragm, which extends, narrowing towards 

 the centre, across the constriction bisecting the opening 

 through which the pseudopodia pass. Plasma normal, 

 occupying about half the cavity of the test ; nucleus 

 with numerous circular nucleoli of nearly equal size ; 

 pseudopodia palmate, very irregular in outline, some- 

 times much expanded and bearing close to the aperture 

 several sand-grains or other adventitious matter. 



VOL. II. 11 



