OBSERVATIONS ON THE PROTOZOA 
34 : 
The spiral arrangement of the punctae at the aboral end seems 
to have been overlooked in Lemmerman’s account of this form. 
It is a point which is not brought out except when the active 
little creature is spinning on its head. 
*Trachelomonas urceolatus Stokes. 34, figure 55. 
Shell- large, light brown, sparsely dotted. Neck obliquely 
truncate, a tail-like point at the aboral end, into which the cav- 
ity of the shell extends. Only dead shells were found. 
* Trachelomonas species? 35, figure 55. 
Shell regularly cylindrical rather than oval, without collar or 
posterior spike. Surface smooth, brown. Length 14 microns. 
As this shell does not conform to any description and was 
empty when found it can be placed in this group only tenta- 
tively. 
Trachelomonas (new species?) From Arkansas. 36, figure 55. 
From liie Trachelomonas teres group. Shell brown, oval, 
with a conspicuous collar flaring at its base and a short rounded 
posterior appendage into which the cavity of the shell does not 
extend. Endoplasm green; stigma large. Length 22.8 microns. 
The single specimen of this Arkansas form which was found 
was in an encysted state and lacked a, flagellum. The oval pro- 
toplasmic body was somewhat constricted at the equator and 
had a thin layer of colorless ectoplasm over the green endo- 
plasm. Three irregular granules (paramylon?) were present. 
It is the opinion of Professor Walton that a new form may be 
represented here, and it is hoped that additional specimens can 
be obtained later. 
*Phacus triqueter (EhrP Not figured. 
Much like the common P. pleur onset es but having a sharp 
keel extending down the center of the dorsal side, and the ven- 
tral surface deeply concave. Edmondson does not record this 
form, but in my experience it has been more common than 
pleuronecA.es. 
otosolenus orbicularis Stokes. 37, figure 55. 
Anterior flagellum one and one-half times the length of the 
body, carried obliquely to the right. Secondary flagellum ven- 
tral, appearing as a small longitudinal line through the body. 
Endoplasm colorless, a circle of minute granules around the 
periphery. Dorsal concavity conspicuous and deep. Not abun- 
