349] STUDIES ON GREGARINES— WATSON 139 



slender, slightly wider than protomerite at shoulder and tapering to a 

 long acutely pointed posterior extremity. Epimerite a spherical button 

 situated upon a short collar and consisting of 12 slender incurved 

 processes terminating in obtuse points. Endocyte brownish yellow. 

 Nucleus spherical, containing 3 to 7 karyosomes. 



Cysts ovoidal, 550 to 600yu, by 280/x. Dehiscence by simple rupture. 

 Spores obese, acutely pointed, two sizes, 4.5 by 2.8;tt and 6.4 by 3.6/a. 



Taken at Poitiers, France. Host: Silpha laevigata F. Habitat: 

 Intestine. 



ACTINOCEPHALUS AMERICANUS Crawley 



[Figure 64] 



1903 Actinocephalus americanus Crawley 1903a :636 



Actinocephalus : The generic determination of this species is not 

 absolute. Crawley's description is quoted below: 



"This species is created for a single individual found in Galerita bicolor 



Drury. . It is placed in the genus Actinocephalus on account of the form of 



both protomerite and deutomerite, the presence of several karyosomes in the nu- 

 cleus and the fact that the host was a carnivorous Arthropod. The gregarine was 

 200^ long, 35^ of which represented the length of the protomerite, 45/* broad. The 

 epicyte — showed a little papilla at the anterior tip of the protomerite. — The en- 

 docyte was much denser in the deutomerite than in the protomerite. ." 



It is probable that Crawley's determination is correct but the 

 recovery of cysts and spores as well as the epimerite is needed to 

 substantiate the determination. 



ACTINOCEPHALUS HARPALI (Crawley) 



[Figure 70] 



1903 Oregarina harpali Crawley 1903 :49 



1903 Actinocephalus harpali Crawley 1903a :637-8 



Actinocephalus: Sporonts solitary, obese. Length 225 to 1200/x. 

 Width not given. Ratio length protomerite : total length :: 1 : 6.5; 

 width protomerite : width deutomerite : : 1 : 1.2. Protomerite broadly 

 dome-shaped, twice as wide as high, flattened at the free end, deeply 

 constricted at the septum. Deutomerite widest a short distance below 

 septum where it is but little wider than the protomerite, tapering from 

 anterior fourth to a blunt posterior end. Endocyte very dense, blackish, 



