20 NEBELA. 



square plates, arranged in transverse longitudinal or ob- 

 lique rows. Sarcode colorless ; pseudopods digitate, one 

 to three or more. Size : length, SOfi to 140;/ ; breadth, 

 40/* to 960/z ; thickness, 28;/ to 48;*. 



Hob. Dripping rocks, ditches, sphagnum. 



GENUS IX. NEBELA. 



SYN. : Difflugia, Reticella, Allodictya, Odontodictya, Ehr. ; Nebela, 

 Leidy. 



Shell usually compressed pyriform, transparent, color- 

 less, with or without appendages, composed of cancellat- 

 ed membrane, or of peculiar intrinsic elements of vari- 

 able form and size, mostly of circular or oval discs, or 

 narrow rectangular plates or rods, or of thin, less regular, 

 angular plates, sometimes of chitinoid membrane incor- 

 porated with extrinsic elements, and sometimes of the 

 latter entirely, as in Diffmgia. Mouth inferior, terminal, 

 oval. Sarcode colorless, same as in Difflugia, Hyalo- 

 sphenia, etc. 



Synopsis of the Species of Nebela. 



PAGE. 



Shell longer than broad, without a keel, colorless, Collaris, 21 



Shell broader than long, spheroidal, Flabellulum, 21 



Shell shaped like N. collaris, with a keel, Carinata, 22 



Shell with a keel ending in long digitate processes 

 projecting downward within, Hippocrepis, 22 



Shell with a pair of lateral, conical spines, diverg- 

 ing upward from the neck, Ansata, 23 



Shell bottle-form with long cylindroid neck, 



covered with short, stiff cils, Barbata, 23 



Shell compressed ovoid with 4-5 processes pro- 

 jecting from fundus, Caudata, 23 



