ADDENDA. 379 



parasite attaches itself to the epithelial cells of the host 

 by its differentiated anterior portion in a sucker-like manner. 

 L. eunicss differs from L. elongata in the form of the tropho- 

 zoite and the structure of its nucleus. 



Habitat. — Intestine of Eunice siciliensis Grube : Andaman 

 Islands, Port Blair. 



310. Lecudina lysidiese Bhatia & Setna. (Fig. 185.) 



■\Lecudina lysidiese, Bhatia & Setna, 1938 (in press). 



Trophozoites oval, broadly rounded anteriorly and narrower 

 and pounded off posteriorly, broadest in the anterior third 

 of its body. Cytoplasm does not show any differentiation 

 in the anterior portion of the body. Epimerite in the form 

 of a long conical trunk. Nucleus spherical, oval or irregularly 

 quadrilateral, with a large central karyosome. Sporonts much 

 larger in size, without an epimerite, but showing a triangular 

 area slightly raised from the anterior end of the body. 



Fig. 185. — Lecudina lysidiese Bh. & Set. 

 (After Bhatia and Setna.) 



Dimensions. — Cephalonts with a total length of 71*9- 

 185/x., maximum width 14- 8-62-9 /x, length of epimerite 11-1- 

 37 /x, and nucleus 14-8 /i by 10 /x. Sporonts may reach a length 

 of 370 /x, with a maximum width of 155-4 jix. 



Remarks. — The parasite invites comparison with L. aphroditse 

 (Lank.), but differs in its much smaller size, in the nuclear 

 structure, and also in the epimerite not being marked with 

 successive constrictions. The nucleus varies considerably 

 in form and position. It may be spherical, oval or irregularly 

 quadrilateral in form, and may be situated in the anterior 

 middle or posterior part of the body, but it always presents 

 the same structure. The central karyosome is surrounded 

 by a clear area, and chromatin particles are arranged in 

 a peripheral zone within the nuclear membrane. The sporonts 

 frequently and the cephalonts occasionally are seen to be 

 full of elongated spindle-shaped bodies, each containing 

 a definite central nucleus ; these are probably algse, and 

 measure up to 74 /x by 3-7 /x. 



Habitat. — Intestine of Lysidice collaris Grube : Andaman 

 Islands, Port Blair. 



