10 



Frontonia acuminata Ehrbg. 



Body of medium size, large, or very large, length 100—350;«, 

 breadth 70— 120 /<. 



The specimens agreed very closely with the figure and description 

 of Biitschli, and were much more pointed posteriorly than that figured 

 by Roux. The trichocysts were abundant, and the anterior portion had 

 a black pigment spot above the buccal orifice. 



Habitat: Uni versitäts wiese (Nov.), Kandel (Nov.), Altwasser Brei- 

 sach (Dec). 



Op h r y ogle n a Ehrbg. 



Of this genus one species, Ophryogleiut flava^ was found. 



Ophryoglena flava Ehrbg. 



Body large or very large, length 200—560 /ii, breadth 70 — 230 u. 



The specimens agreed more closely with the measurements of 

 Schewiakoff, length 200—300 /<, breadth 70—100 /.i, as they varied 

 from 200 — 225 i^i in length and from 88—96 /t in breath. In other 

 respects they were quite normal. The two contractile vacuoles are 

 placed, one in the anterior, the other in the posterior portion, and each 

 has 6 afferent canals. The contraction and disappearance of the vacuoles 

 were carefully watched, and it was found that they contracted and dis- 

 appeared every 15 seconds, the anterior alternating with the posterior, 

 so that one was always present. 



Habitat: Lehen (Nov.). 



Paramoecium Hill. 



Of this genus, the four species, Paramoecium awelia, Paramoecium 

 caudatum^ Paramoecium hursaria and Paramoecium putrinum were 

 found. 



Paramoecium aurelia 0. F. Müll. 



Body of medium size or very large, length 75 — 295 (.i^ breadth 

 15—50 /^ 



The specimens were typical. Several specimens were found in divi- 

 sion, and conjugation was common in one instance among the specimens 

 found in the debris at the bottom of an aquarium. 



Habitat: Lehen (Nov.), Hugstettin Freiburg (Nov.), Waldsee Upper 

 (Dec), Deichelweir (Nov.). 



Paramoecium caudatum Ehrbg. 

 Body large or very large, length 120 — 325 (.i^ breadth 20 — 60 ,«. 

 The specimens were typical, and were abundant in October and 

 November, but were found only once later in December. 



Habitat: Lehen (Oct.ì, Lochmatten (Nov.), Waldsee Upper (Dec). 



