22 NEBELA. 



versely oval, slightly convex downward, in the long 

 diameter. Shell, sarcode and pseudopods, like those of 

 N. collaris. Common. Size : length, 68// to 96^ ; 

 breadth, 72^ to 104// ; thickness, 32/* to 48/* ; mouth, 

 from 24/z by 12// to 20^ by 12//. 

 Hob, Sphagnous swamps. 



carinata. SYN. : Dijflugia carinata, Archer ; N. cari- 

 nata, Leidy. 



Shell resembling in shape and structure that of N. 

 cottaris, but provided with a thin keel of chitinoid mem- 

 brane, beginning above the neck and extending along the 

 lateral borders over the fundus. Sarcode like that of 

 N. collaris. Size : length, 144^ to 240// ; breadth, 88^ 

 to 168// ; thickness, 40^ to 72;* ; mouth, 36// by 20 to 28// 

 by 28// ; carina, from 4/* to 20/* deep. 



Hob. Sphagnous swamps. 



Nebela hippocrepis. SYN. : Difflugia (Nebela) equicalceus, 

 N. equicalceus, Leidy. 



Shell compressed pyriform, with thick, blunt, solid 

 carina extending around the fundus and lateral borders, 

 and ending in long, digitate processes projecting down- 

 ward into the interior of the cavity. Mouth transversely 

 oval, convex downward. Shell transparent, colorless, 

 composed of circular disks ; carina pale straw colored, 

 indistinctly granular. Sarcode, as in N. collaris and 

 carinata. Size : length, 252// to 260/* ; breadth, includ- 

 ing carina, 140/j to 160/* ; thickness, 68// to 72/4 ; mouth, 

 40// by 28// ; carina, 16^ and 8// deep. 



Hob. Sphagnum. 



