41] STUDIES ON GREGARJNES—KAMM 41 



cent at anterior end and an apparent pore at the apex. Very slight con- 

 striction at the septum. Deutomerite ovoidal, broadly rounded at the 

 distal end. Nucleus apparently ovoidal, situated near septum. Satellite 

 more nearly cylindrical than primite. 



Intracellular stage noted. 



Intestine, coelom, and "sub-epithelium" of Pinnotheres pisum Penn. 



In the first paper above, Leger reports finding coelomic schizogonic 

 cysts 150/x in diameter which produce sporozoites directly. 



Leger and Duboscq (1907) conclude that the two types of cysts encoun- 

 tered respectively in the coelom and alimentary tract represent different 

 species of parasites, only one type of sporont having been seen, however. 

 They have found no other stages of the coelomic gregarine except the 

 cysts and contained sporozoites and have found all the stages in the life- 

 history of the intestinal parasite. I am convinced that but one species is 

 involved producing two kinds of cysts depending on conditions not yet 

 determined. I am not ready, however, to remove any of the species now 

 placed to another position. Much more work is needed upon crustacean 

 gregarines and parasites placed elsewhere before any species can be assigned 

 positions with a fair degree of permanence. 



CEPHALOIDOPHORA OCELLATA (Leger and Duboscq) Kamm 



[Figure 80 



1903 Aggregate vagans Leger and Duboscq 1903: cxlvii 



1907 Frenzelina ocellala Leger and Duboscq 1907: 774 



1908 Frenzelina ocellata Leger and Duboscq 1908: 99 



1909 Frenzelina ocellata Leger and Duboscq 1909a: 112, 114,115 

 1911 Frenzelina ocellata Sokolow 1911: 280-1 



1922 Cephaloidophora ocellata Kamm 1922 (this paper) 



Sporonts in pairs, elongate cylindrical, 200/i in maximum length. 

 Primite the larger. Ratio LP :TL :: 1 : 6 to 1 :9; WP: WD :: 1: 

 0.9. Protomerite widest anterior to the mid-region with two large cor- 

 puscles resembling eyes in both primite and satellite. A flattened^ cone 

 projects at the anterior end. Slight constriction at septum. Deutomerite 

 widest at shoulder, tapering from thence gradually and terminating in a 

 broadly rounded end. Nucleus ovoidal to rectangular, situated at or above 

 mid-region of deutomerite. 



Intestine of Eupagurus Prideauxi Leach. 



Taken at Banyuls, France. 



This species was first described as Aggregate vagans and shown to exist 

 during the sporont stage in the intestine but to be able to pass while 

 comparatively large in size through the epithelium into the coelom. A 

 single individual here swells, its protoplasm changes in character, and it 

 finally becomes a schizogonic cyst 150/i in diameter in which are produced 

 sporozoites directly, as in the family Aggregatidae. 



