44 DAVENPORT ACADEMY OF SCIENCES. 



Trachelomonas sp. 



Probably a new species. 



lyorica ovate, widest and broadly rounded anteriorly, narrow 

 and acutely rounded posteriorly. Surface punctate in a regular 

 manner, the punctae being arranged in oblique rows in two direc- 

 tions. Aperture plane, a neck never being produced. Flagel- 

 lum long. Endoplasm usually green. Color of lorica some shade 

 of brown. 



I^ength, 27 microns. (Fig. 71, PI. X.) 



A species, the chief characters of which are given above, has 

 been found in Johnson county, Iowa. 



Dr. T. C. Palmer of Media, Pa., whose work upon this par- 

 ticular genus is deserving of no little merit, after examining speci- 

 mens sent him for identification, considered that the Iowa form 

 was probably a new species. It apparently resembles, in outline, 

 Trachelomonas rctiadata Klebs, but the recticulate surface has 

 not been made out in the species in this state; on the other hand, 

 the punctae which cover the surface are arranged with the regu- 

 larity described above. 



Habitat, infusions of pond water among decaying vegetation, 

 being developed in great numbers on the occasions observed. 



Distribution has not thus far been found to be general. It is 

 hoped that further observation may reveal a more complete 

 knowledge of the organism. 



CRYPTOGIvENA Ehr. 



Body flattened, persistent in shape. Two lateral, brightly col- 

 ored pigment bands. Flagellum single. Mouth, eye-spot, nucleus 

 and contractile vesicle usually visible. 



Cryptoglena pigra Ehrenberg. 



Body oval, somewhat flattened, pointed posteriorly. Flagel- 

 lum single, short. Two bright green pigment bands one on either 

 side following the contour of the body. A scarlet pigment spot 

 near the anterior extremity, nucleus posterior to the center of 

 the body. 



Length, 12 microns. (Fig. 83, PI. XI.) 



Cryptoglena pigra is not abundant in this state but may be 

 found associated with Euglena viridis in fresh water. 



