GENUS NEBELA— NEBELA CAUDATA. 161 



dus. Mouth transversely oval. Shell transparent, colorless, with the 

 structure resembling that of Nebela collaris, but usually less distinct. Sar- 

 code colorless. 



Sue. — Length of the shell, exclusive of processes, 0.08 mm. ; breadth 

 0.06 mm.; thickness 0.032 mm. ; breadth of mouth 0.02 mm. by 0.016 mm. 

 Length of processes 0.016 mm. to 0.024 mm. 



Locality. — Rare, in sphagnum of the cedar swamps of Absecom and 

 Malaga, New Jersey. 



IVefoela caudata, represented in figs. 21-24, pi. XXVI, is compara- 

 tively rare, as I have not seen more than half a dozen specimens, and none 

 of these were in an active condition. It was found in association with the 

 more common forms in the sphagnum of the cedar swamps of Absecom 

 and Malaga, New Jersey. 



The shell is compressed ovoid, but in the narrower view appears more 

 pyriform. From the lateral borders and summit, as seen in the broad view 

 of the shell, there projects an unsymmetrical row of four or five long cau- 

 date appendages. These are narrow conical or clavate, hollow prolonga- 

 tions of the shell, straight or curved and blunt. Gradually expanding at 

 the base, they give a somewhat polyhedral outline to the shell. The mouth 

 of the latter is transversely oval and convex downward. 



The shell is colorless and transparent, and appears to have the same 

 structure as in Nebela collaris, but usually less distinct. 



In one of the specimens observed, of N. caudata, the shell was com- 

 posed of comparatively large circular disks overlapping at their contigu- 

 ous borders. Another specimen, an empty shell, was made up of circular 

 and oval disks mingled with narrow rectangular plates. In a third specimen, 

 the shell was composed of chitinoid membrane indistinctly granular and 

 with no decided appearance of disks or rectangular plates. The caudate 

 processes are chitinoid extensions of the shell. 



In the specimens observed which were not dead, the sarcode was in an 

 encysted condition, appearing as a compressed spherical ball, occupying 

 the central part of the body of the shell, while the mouth of the latter was 

 closed with a thick epiphragm. The sarcode ball was colorless, and filled 

 with fine granules and clear globules. 



Four specimens measured the same length, ^th of an inch; two 



11 KIIIZ 



