68 PROFESSOR O. BUTSCHLI. 



The author next describes a small parasitic Flagellate 

 found in the alimentary canal of a free living Nematode 

 Trilohus gracilis. The individuals were aggregated together 

 by their non-flagellate poles, into radiating colonies. Single 

 individuals, which are easily isolated, are very long and 

 spindle-shaped, so as to be almost rod-like (from about 

 0*01 1 mm. in length); they are colourless, and are provided 

 at the blunter end of the body with a large thick flagellum, 

 of almost twice the length of the body. A contractile 

 vacuole lies somewhat behind the base of the tentacle, and 

 at some distance below this, in the otherwise feebly and 

 very finely granular protoplasm of the body, is seen a small 

 mass of high refractive index, composed of dark granules. 

 No nucleus is observable. The movement of the organism 

 is tolerably slow after it has been removed from the intestine 

 of Trilobus, at least in water, in which it dies rather 

 quickly. 



Antophysa., Bory de Vincent. 



Small colourless Flagellata forming racemose colonies ; the 

 number of individuals forming a colony varies from two to 

 fifty, according to Clark. The individuals of each racemose 

 colony are attached without lateral connection, by a short 

 stalk-like prolongation of the hinder end of the body to a fine 

 terminal branch of the thick, branching, brown-coloured 

 main stem ; each individual has a large fiagellum and a 

 delicate accessory flagellum, a lip-like prolongation for the 

 ingestion of food, and a contractile vacuole. The nucleus 

 is doubtful. Reproduction by fission on the stalk in the 

 colony ; whole colonies, as well as single individuals, fre- 

 quently separate themselves and swim about, such individuals 

 again becoming fixed, probably form the commencement of a 

 new colony. 



Antophysa vegetans, O. F, Muller. 



Vohox vegetans, Muller (' Animalcula Infusoria/ p. 22, 

 pi. iii, figs. 22—25). 



Antophysis Mulferi, Bory (' Encycloped. meth,,^ 1824 ; 

 'Hist. Nat. des Zoophytes,' p. 66). 



EjnstyUs vegetans ?, Ehrb. {' Die Infusionsthiere als voll- 

 kommene organismen,' Leipzig, 1838, p. 285, pi. xxvii, fig. 5). 



Antophysa Millleri, Dujardin (' Histoire nat. des Infu- 

 soires,' Paris, 1841, p. 302). 



Antophysa Millleri, Cohn (' Entwickelungsgeschichte der 

 Mikroskopischen Algen und Pilze, Nov. act. Ac. c. L.C, &c.,' 

 Bd. xxiv, p. 109, pi. XV, figs. 1 — 8). 



