1880. J NATURAL SCIENCES OF PHILADELPHIA. 337 



locomotive condition. Small forms common ; giant forms few, 

 Individual specimens noted as follows : . 



1. Length 0.078, breadth 0.06 ; breadth of mouth 0.018. Compressed oval ; 

 living. 



2. Length 0.078, breadth 0.06 ; breadth of mouth 0.018. Oval with short 

 neck. Empty shell ; cancelli circular, variable, the largest 0.006, the smallest 

 0.003. 



3. Length 0.078, breadth 0.06 ; breadth of mouth 0.012. Oval with short 

 neck; living, active ; nucleus, 0.12. 



4. Len:;th 0.081, breadth 0.054; breadth of mouth 0.018. Empty shell, 

 with sharply defined circles, large and small, together with a few rods. 



5 Length 0.084, breadth 0.042; breadth of mouth 0.018; with neck 0.018 

 long. Empty shell, with minute circles on the neck, but unusually large in 

 proportion to the shell on the body where they ranged from 0.006 to 0.012. 



6. Length 0.084, breadth 0.048; breadth of mouth 0.018. Flask-like empty 

 shell, with minute circular cancelli 0.003 or less. 



7. Length 0.084, breadth 0-54; breadth of mouth 0.012. Flask-like empty 

 shell minutely and uniformly cancellated. 



8. Length 0.084, breadth 0.05; breadth of mouth 0.015. Oval, empty. 



9. Length 0.09 , breadth 0.072 ; breadth of mouth 0.^2 1. Flask-like. ' 

 10. Length 0.096, breadth 0.078 ; breadth of mouth 0.024. Pyriform ; neck 



0.006 long; cancelli circular, variable in size, a few on the fundus to 0.012. 

 Sarcode an encysted ball, with yellowish oil-like food globules ; diameter of 

 ball 0.048. 



Some giant forms especially noted were as follows : 



11. Length 0.18; breadth 0.09; breadth of mouth 042. Living; shell 

 nearly replete with sarcode, colorless but containing a multitude of bright 

 yellowish and brown globules from 0.006 to 0.012. 



12. Length 0.21; breadth 0.12; breadth of mouth 0.048. Empty shell of 

 faint yellowish tint ; basis of structure faintly and uniformly punctate with 

 only distinct minute circular cancelli approaching the fundus. 



18. Same size as preceding. Shell mostly of minute circular cancelli, larger 

 near the fundus and there mingled with a few square ones. Shell closed by an 

 operculum. Sarcode contracted into an oval mass 0.144 by 0.072. 



14. Length 0.192; breadth 0.102; breadth of mouth 0.048. Shell with 

 minutely cancellated structure. Sarcode in a ball 0.084 by 0.072. 



Nebela flabellulum. — This form comparatively rare. Shell 

 nearly circular in outline, with a short neck, mostly composed of 

 minute circular cancelli more or less nearl}^ uniform or variable ; 

 rarely of elliptical cancelli. ^ 



