334 SPOROZOA. 



Family CERATOMYXID^ Doflein, 1899. 

 Typically coelozoic parasites of marine Fish. 



Genus CERATOMYXA Thelohan, 1892, emend. 



Ceratomyxa, Thelohan, 1892, pp. 169, 171, 175 ; Labbe, 1899, 

 pp. 89-91 ; Minchin, 1903, pp. 289, 293, 295, 298 ; 1912, p. 408 ; 

 Kudo, 1920, pp. 61-80 ; Wenyon, 1926, p. 725 ; Eoiowles, 1928, 

 p. 324; Reichenow, 1929, pp. 195.3-7; Kudo, 1931, p. 306; 

 1933, pp. 196, 199-201 ; Calkins, 1933. p. 567 ; Reichenow, 1935, 

 p. 386. 



Spore arched, breadth more than twice the sutural diameter. 

 Valves of spore extended into long, lateral, conical, and 

 hollow processes. Sporoplasm asymmetrically placed, usually 

 not filling the intrasporal cavity. Monosporous, disporous 

 or polysporous. Generally in the gall-bladder or urinary 

 bladder of marine Fish. 



Key to Indian Species. 



1(2). Spore crescent-shaped, 14-15 /i by 4r-5;Lt. C . gohioidesi Chak.., 



[p. 334. 

 2 (1). Spore elliptical, 30-40 ja by lO/ii C. hilsse Chak., p. 335. 



276. Ceratomyxa gobioidesi Chakravarty. 



^Ceratomyxa sp., Ray, 1933 a, p. 259 ; 1933 b, p. 349. 

 ^Ceratomyxa gobioidesi, Chakravarty, 1938. 



Trophozoites more or less spherical, not showing sharp 

 demarcation between ectoplasm and endoplasm, pseudo- 

 podia short and blunt. Disporous ; spores crescent-shaped, 

 valves sjnnmetrical and terminating in blunt points, sutm-al 

 plane distinct. Extra-capsular cavity filled with finely 

 granular sporoplasm. Polar capsules equal and spherical, 

 situated on each side of the sutural plane, and provided with 

 distinct coiled filaments. 



Dimensions. — Trophozoites 500-650 /n in diameter ; spores 

 14-15 )Li in breadth, 4-5 /x in sutural diameter ; polar capsules 

 2-5-3 /A ; polar filament 15 /x. 



Remarks. — Ray (1933 a, b) reported this species from a 

 number of estuarine fish, but did not publish any description. 

 Chakravarti (1938) has recently restudied the form and 

 described it as a new species. He has kindly allowed me to 

 see the manuscript of his paper prior to its pubHcation, and 

 to abstract the description of this and several other species. 



Habitat. — Liver, gall-bladder, kidney, ovary, etc., of 

 Gobioides rubicundus Hamilton ; gall-bladder of Tricho- 

 gaster fasciatus Schneider and Macrones gulio (Ham.-Buch.) : 

 Bengal, Calcutta. 



