Stokes.] [April 18, 



the furcation is 'such that they may slightly diverge, or be so closely 

 approximated that their inner borders are almost in contact and broadly 

 obovate in outline. 



Lagenophrys bipartita, sp. nov. Fig. 23. Lorica subhemispherical, 

 depressed ; dorsal surface rounded, ventral flattened, and surrounded 

 horizontally by a depression that gives the adherent margin a projecting 

 aspect as if bordered by a narrow riin, an internal membrane extending 

 as a floor across the lorica at the position of the encircling constriction 

 and dividing it into two unequal parts ; posterior border irregularly crenate, 

 the surface obliquely striate or ridged ; the anterior valvular aperture 

 small, the valves acuminate. Diameter of the lorica ^ inch. Hab. 

 Ectoparasitic on Daphnia. 



This was taken abundantly adherent on the entomostracon mentioned, 

 being observed in a gathering made on January 19, 1890. The winter 

 had been an exceptionally mild one, and this collection resembled collec- 

 tions made in the early spring in the abundance, variety and activity of 

 their microscopic life. Even the entomostraca were burdened by their 

 usual load of infusorial parasites. 



This is the only member of the genus in which a dividing membrane 

 has been observed above the region adherent to the supporting object, and 

 acting as a floor on which rests the soft body of the enclosed animalcule. 

 This floor-like structure exists, and is readily demonstrated if the lorica can 

 be detached uninjured from the host, as the writer has several times had 

 the opportunity to do. The enclosed zooid seems to rest on this floor-like 

 partition, being of course adherent at the anterior valvular orifice, as is 

 commonly the structural arrangement with all the observed species. The 

 projecting basal rim has a tendency to become brown, as is so frequently 

 observed in many infusorial loricoe, and its surface is irregularly crenulate. 

 With advanced age it probably changes color entirely. 



Podophrya pusilla, sp. nov. Fig. 23. Body subspherical, pedicle com- 

 paratively stout, its length equaling about one-half the diameter of the 

 body ; tentacles from twelve to fourteen, irregularly distributed, distinctly 

 capitate, often twice as long as the diameter of the body ; contractile vesi- 

 cle apparently single, situated near the centre of the frontal border ; 

 nucleus obscure, apparently subspherical ; endoplasm usually finely gran- 

 ular. Diameter of the body T ^ inch. Hab. Pond water, attached to 

 various aquatic weeds. 



Solenophrya oblonga, sp. nov. Fig. 24. Lorica oblong, very much com- 

 pressed, less than three times as long as broad, often tapering posteriorly, 

 the lateral borders nearly straight, the posterior margin rounded or 

 somewhat flattened, seemingly by the pressure of the supporting object ; 

 anterior margins somewhat convex, not continuous but separated by a 

 narrow interval, the lateral borders enlarged and rounded ; tentacles in 

 two antero-lateral fascicles, capitate ; contractile vesicle single, small, 

 located near the anterior border ; nucleus ovate, slightly curved, placed 

 subcentrally near one lateral border ; endoplasm granular, almost entirely 



