448 Dr. A. C. Stokes on some 



equatorially-disposed rim or projection, close to which the 

 thin walls are pierced by narrow fissures for the exit of the 

 four to six fascicles of distinctly capitate tentacles ; animal- 

 cule elongate-ovate or subspherical, entirely enclosed, not 

 attached to the lorica posteriorly ; contractile vesicle single ; 

 nucleus ovate, coarsely granular. Diameter of lorica -ghj inch. 



Hob. Standing water ; attached to Proserpinaca ana other 

 aquatic plants. 



The margin of the sheath in most of the 'loricate members 

 of the order to which the genus Solenophrya belongs is usually 

 difficult to demonstrate distinctly ; but in this particular 

 species the frontal convexity or roof is so hyaline that its ex- 

 istence can be satisfactorily observed only by the use of some 

 chemical means of removing the enclosed zooid. This is 

 readily accomplished by a drop or two of caustic potash in 

 solution. The soft animal is thus entirely dissolved, the 

 hyaline lorica remaining unchanged and in condition for ex- 

 amination. The lorica is then observed to be generally but 

 irregularly spherical, the rounded contour being interrupted 

 anteriorly by the conspicuous rim, the edge of which is also 

 irregularly undulate and angular. The fascicles of tentacles 

 seem to issue from fissures near this rim, as I have been 

 unable to detect openings in the upper surface or dome-like 

 roof of the lorica. 



Solenophrya pera, sp. nov. (PI. XV. fig. 6.) 



Lorica irregularly cubical or satchel-shaped, compressed 

 anteriorly, membranous, hyaline, the greatest height, length, 

 and breadth subequal, longest and widest at the base of 

 attachment, narrowing to the anterior border, the sides more 

 or less concave, the sloping ends truncate, the posterior 

 angles rounded, a narrow elongate cleft extending along the 

 entire frontal margin ; enclosed animalcule oval, about twice as 

 long as broad, not adherent to the lorica posteriorly ; ten- 

 tacles numerous, capitate, arising from the entire frontal 

 border ; contractile vesicle single, posteriorly placed ; nucleus 

 conspicuous, subspherical, coarsely granular, located somewhat 

 in advance of the pulsating vacuole. Length and height of 

 lorica ^fa inch, width ^j ; length of animal T |- ff inch, width 

 T2V0 to x"cW i ncn 5 tvv0 individuals often occupying the same 

 lorica. 



Bab. Standing water ; attached to Myriojphyllum and other 

 aquatic plants. 



The form of this lorica is so much like that of the ordinary 

 hand- satchel now popular among ladies, that it suggested 



