THE H^MOFLAGELLATES. 309 



doubt that this parasite, at any rate, beloncfs to a distinct type. It is very 

 long and narrow, typically eel-like (fig. 17 k), and attains a length of 70 — 

 80 ju, with a width of only 2| — 3 ^. The free flagellum is long, about 25/t, 

 and, indeed, the whole locomotor apparatus is well developed. The kineto- 

 nucleus is large and situated very near the anterior end, which ceases 

 abruptly in a short but pointed cone. Practically the entire cytoplasm is 

 . filled with large deeply-staining grains, which may surround and obscure 

 the nucleus. (V.) host, Anguilla vulgaris, eel. The discovery of this 

 Trypanosome is due to Sabrazes and Muratet (94). 



T. claria3, Montel, 1905. Length 60;tt; breadth 4;u. Ribbon-like. 

 Anterior end short and sharply conical, with kinetonucleus close to the 

 extremity. This parasite appears not unlike the last, differing in being 

 somewhat wider. (V.) host Clarias (Silurus c). Cochin China. 



Flat-fish appear to have a fair share of these Hajmatozoa, but only one 

 form has been figured. Moreover, in nearly every case, a Hiemosporidian 

 has been often found associated with tlie Trypanosomas, the latter being 

 usually much rarer than the former. 



T. solese. Lav. and Mesn., 1901. — Length about 40 /t; width not given. 

 The free flagellum is only about 8 /t long, or relatively short (fig. 17 j). The 

 anterior end is fairly tapering, more so than the hinder one, which is some- 

 what blunt. The spherical kinetonucleus is very large, and occupies the 

 entire width of the parasite. Fine longitudinal striations are noticeable in 

 the cytoplasm. (V.) host, Solea vulgaris, sole, which also contained 

 Haemogregarina simondi. (I.) host, probably He mi bde 11a solese, 

 a leech, which was common on all the fish examined. 



T. platessfe, Lebailly, 1904— Length 52 fi; width 3— 3§ ju. Free 

 flagellum 12 fi. Anterior end finely tapering. Trophonucleus in the 

 posterior half of the body. (V.) host, Pleuronectes platessa (Pla- 

 tessa vulgaris), plaice. Associated with a new Hasmogregarina, 

 H. platessae. 



T, f lesi, Lebailly, 1904. — Length 55 /t ; width 5 /x, or rather wider than 

 T. platessfe. Free flagellum 10/x long. Kinetonucleus rather nearer 

 the anterior end than in the preceding species, and trophonucleus about in 

 the middle. (V.) host, Pleuronectes flesus (Flesus vulgaris), 

 flounder, which also contained a new Haemogregarina, H. f lesi. 



T. laternse, Lebailly, 1904.— Length 65 ft ; breadth 5 — 6/t. Flagellum 

 very short, only about 8 n long. (V.) host, Platophrys laternse. Asso- 

 ciated with Hpemogregarina laternse, Lebailly. 



These three forms of Lebailly, have, it will be gathered, much in common 

 with each other, and also with T. solese. The relatively short flagellum is 

 a feature in all. 



T. bothi, Lebailly, 1905. Length 42 ju; of flagellum alone 13 /x ; 

 width Bfi. Anterior end thin and tapering. Trophonucleus in the pos- 

 terior half of the body. This parasite much resembles the next one. (V.) 



