295] STUDIES ON GREG ARINES— WATSON 8S 



merite and terminating in an eccentrically placed point. Sides of this 

 cone set with eight digitiform, upwardly directed processes. Deutome- 

 rite regularly ellipsoidal, widest in the anterior half or nearly globular, 

 terminating in a broadly rounded extremity eight to ten times the length 

 of the epimerite and protomerite together. Endocyte dense, finely 

 granular, with spherical karyosomes. Cysts are described in the liter- 

 ature as spherical, dehiscence by simple rupture. Spores elongate cylin- 

 drical, united in chains. Dimensions not given. 



Taken at Paris, France ; Cambridge, Mass. ; Wyncote, Pa. ; Raleigh, 

 N. C. ; and Boulder, Colo. Hosts : Lithohius forficatus Linn. (L. for- 

 cipatus) and Lithohius coloradensis (Cock.) Habitat: Intestine. 



Crawley (1903:52) found this gregarine rather common in Litho- 

 hius forficatus in eastern United States, and Ellis (1913:465) found it 

 in the West. Neither gives figures of the species. Since Schneider 

 gave no dimensions, these writers based their determination on a com- 

 parison of their material with his figures. Ellis gives these measure- 

 ments: length 180/i, width 80/t. He says 



" processes of the epimerite disappearing shortly after the animal frees itself 



from the intestinal wall of the host, but the conical part persists in the spo- 



ront stage, giving a symmetrical margin to the front of the protomerite." 



"In some specimens the ratio of the length of the protomerite to the length 

 of the deutomerite was as low as one to seven, while Schneider's original figures 

 give it as one to eleven or more. Other specimens seemed intermediate between 

 E. hispida (Schn.) and E. horrida (Leger). It seems probable then that E. hor- 

 rida (Leger) is synonomous with E. hispida, leaving a single species in this 

 genus." 



That Ellis found the ratio of length protomerite : length deutomerite 

 as low as 1 : 7 is not out of harmony with Schneider's proportions of 

 E. hispida, for the latter says 



"Deutomerite huit a dix fois environ plus long que le segments superieure 

 reunis ." 



E. horrida is much more nearly globose than such proportions indicate 

 and there is no good argument for considering the two species synony- 

 mous. 



Half a dozen specimens of Lithohius forficatus were examined at 

 Oyster Bay, L. I., in October, 1915 and three of them were found to be 

 parasitised with this species. (Figs. 270, 272). From ten to fifty- 

 adult parasites were found in the intestine of each host. This species 

 is readily recognized by its intense black color. The specimens are 

 small, the maximum length seen being 330/t, and the maximum width 



