I9l8. j T. Southwell & B. Prashad : Indian FisJi Parasites. Ml 



Turag river, Mirpur, Dacca district, Bengal, June, 1917. Numerous 

 cysts. 



Type specimens in the collection of the Zoological Survey of India 

 (Indian Museum), Calcutta, numbered P \^. 



Myxobolus seni, sp. no v. 



Cyst (Fig. 28.). — Elongated, ellipsoidal, varying in length from 

 J:"7 mm. to 5'4 mm. by 2*9 to 3'7 mm. in breadth. Whitish with black 

 scattered granules on the surface. 



Spore (Figs. 29-31.). — Body oval, much wider behind than in front 

 and pointed at the anterior end. The size of the spore varies from 

 13-2 fi — 13'6 fJL in length and 10-1 [X — 10-3 ju- in breadth. The spore wall 

 is formed of two valves, the point of junction of these valves is slightly 

 thickened as seen in a side view\ There is a single polar capsule about 

 4 ju. long ; in it there is a much coiled polar filament, which in one case 

 measured as much as 43 /x in length. lodinophilous vacuole measuring 

 2 '3 JUL is also to be seen. 



Habitat. — On the median and caudal fins of Laheo rohita (Ham. 

 Buch.) Mirpur, Dacca, 22nd January 1918. 



Type specimens in the collection of the Zoological Survey of India, 

 Calcutta, numbered P y^. 



Remarks. — This species differs very remarkably from the other species 

 described in this paper as M. rohitae, in the spores being of a much 

 smaller size, while the cyst is much larger. It differs from all previously 

 described unicapsulate forms in the shape and size of the cyst, the spore 

 and polar capsules. 



Myxobolus nodularis, sp. nov. 



Cyst (Figs. 32 and 33.). — Eounded or slightly elongated, varying 

 in length from 3-5 — 3-8 mm. and 2 3 — 2 '8 mm. in breadth. Creamy 

 yellow in colour, in one case appearing blackish owing to the large num- 

 ber of black granules scattered in its surface. 



Spore (Figs. 34-36.). — Ovoidal. The size of a spore is 9 /x by 7-2 /x. 

 The spore wall is formed of two valves, and the junction of the valves 

 is very thick, as is seen in a lateral view of the spore. There are two 

 capsules of equal size, measuring 3 '4 f.i in length. The polar filament 

 in each of the capsules is very much coiled. In a spore in which the 

 filaments were extruded, they measured 18"3 ju, in length. 



Habitat. — In the muscles of Rashora danieonius (Ham. Buch.) occur- 

 ring in two fishes on the side?, and in another as a globular cyst near 

 the anus. Mirpur, Dacca, 7th June 1917. 



Type specimens in the collection of the Zoological Survey of India, 

 numbered P ^^ . 



Sphaerospora sp. 



We would here record the occurrence of a species of Sphaerospora, 

 Thelohan, from Burma. The poor condition of the- material did not 

 allow of a complete account of its structure, but the bicapsulate, 

 rounded structure of its spores places it undoubtedly in the genus 



