SCOTTISH FRESHWATER RHIZOPODS AND HELIOZOA 93 



and irregularly undulate. Side view of shell narrowly sub- 

 lanceolate, apex obtusely conical and rarely curved, horns 

 often bent. Basal view of shell elliptical with produced 



D 



Nebela bicornis, sp. n. A and B, two shells from the front view ; C and D, 

 two side views ; E, basal view of shell showing mouth. ( x 520.) 



extremities, mouth subcircular or rotund elliptic. Shell 

 composed of minute plates, somewhat irregular in shape and 

 longer than their diameter, with no definite disposition. 



Length of shell, inclusive of horns, 96-117/1; breadth 



