357] STUDIES ON GREG ARINES— WATSON 147 



tomerite : width deutomerite : : 1.3 : 1. Protomerite equal to or longer 

 than deutomerite, the anterior fourth hemispherical to subglobose, below 

 which is an elevated flange-like portion, remaining two thirds cylindri- 

 caL No constriction at septum. Septum projecting forward into pro- 

 tomerite like the finger of a glove. Deutomerite ovoidal, tapering, bluntly 

 pointed posteriorly. Endocyte dense, homogeneous, light brown. 



Cysts and spores not known. 



Taken at Douglas Lake, Mich. Host: Hydrophilus sp. Habitat: 

 Intestine. 



This species was described by Ellis as a member of the genus Lege- 

 ria. His description is as follows : 



"Epimerite not seen ; sporonts extremely active, constantly changing the 

 shape of the anterior three-fifths of the body and proceeding rather rapidly in a 

 serpentine path as a result, the protomerite often being bent almost forty-five de- 

 grees from the main axis of the body; expanded individual with a protomerite 

 equal to or longer than the deutomerite, the anterior fourth of the protomerite 

 hemispherical to subglobose, below which is an elevated flange-like portion, re- 

 maining two thirds cylindrical, the posterior portion with a cup-shaped depression 

 some 6o° deep into which the anterior conical portion of the deutomerite fits ; deu- 

 tomerite excepting the portion included by the protomerite ovoid, rather sharply 

 rounded posteriorly ; average sporonts 720^ in length ; ." 



A comparison of figure 82, a copy of Legeria agilis (Schn.) Labbe with 

 figure 80, Ellis' species in question, reveals differences in the two. The 

 genus Legeria is characterized by: a) deutomerite spindle shaped ( same 

 as in Bothriopsis) ; b) protomerite much less than half the total length; 

 c) protomerite cylindrical, dilated in anterior third, terminating in a 

 simple obtuse angled cone; d) septum broadly convex upward into the 

 protomerite in the shape of an hemisphere; e) nucleus spherical; f) agil- 

 ity of movement not confined to protomerite, but equally active in both 

 segments. The species in question does not belong in this genus for the 

 protomerite occupies more than half the total length, it does not termi- 

 nate in a cone, the septum is not broadly dome shaped and movement 

 is not equally active throughout the sporont. 



Bothriopsis is diagnosed by Schneider as having a) an unusually 

 well developed protomerite consisting of a large polymorphic mass con- 

 vex or concave at its anterior end and nearly or equally as long as, or 

 longer than, the deutomerite, cylindrical in posterior two thirds; b) a 

 septum invaginated into the protomerite like the finger of a glove; c) 

 an ellipsoidal nucleus; d) endocyte yellow to dark brown; e) agility of 

 movement chiefly conflned to the protomerite. 



The species in question coincides with the genus Bothriopsis in these 

 characteristics: 1) polymorphism chiefly confined to anterior three 



