311] STUDIES ON GREGARINES-WATSON 101 



merite and deutomerite. Associations were not mentioned, however. 

 His figure 37 (Figure 189) is quite different in shape and the epimerite 

 is an inverted campanular structure furnished with slender upwardly 

 directed digitiform processes. Because of the epimerite, Crawley (1903) 

 placed the species in the genus Stephanohora. In 1907, he found cepha- 

 lonts in locusts quite unlike those seen by Leidy. They possessed simple 

 knobbed epimerites like those of other species of the genus Gregarina. 

 He saw the sporonts also, and they compared favorably in length with 

 those described by Leidy. At the same time, Crawley substantiated 

 Leidy 's discovery of the digitform epimerite, for he found similar ceph- 

 alonts and also sporonts which compared. Thus it was discovered that 

 two species were involved, the one a true Gregarina, the other not. The 

 latter species is now known as Actinocephalus fimbriatus (Diesing) 

 Ellis. 



The name of the species as given by Leidy is a trinominal and can- 

 not stand. The first binominal name applied to the species was that of 

 Lankester, which must be used to designate the species. The name used 

 by Diesing, Gregarina fimbriata, applies to the species Actinocephalus 

 pachydermus for he says proboscis "digitato-fimbriata". 



GREGARINA OVICEPS Diesing 

 [Figures 191, 192] 



1853 Gregarina Achetae abbreviate Leidy 1853 :238 



1856 Gregarina Achetae abbreviatae Leidy 1856 :47 



1859 Gregarina oviceps Diesing 1859 :730 



1863 Gregarina Achetae Lankester 1863 -.94 



1899 Gregarina achetaeabbreviatae Labbe 1899 :35 



1903 Gregarina achetaeabbreviatae Crawley 1903:45 



1903 Gregarina achetaeabbreviatae Crawley 1903a:639 



1907 Gregarina achetaeabbreviatae Crawley 1907 :220-1 



1913 Gregarina achetaeabbreviatae Ellis 1913b :266 



1915 Gregarina achetaeabbreviatae "Watson 1915:34 



Gregarina: Sporonts biassociative, obese. Maximum length 500/i. 

 Average sporonts 450/* in length, 225/i in width. Ratio length proto- 

 merite : total length primite : : 1 : 3 ; width protomerite : width deuto- 

 merite : : 1 : 1.1. Protomerite hemispherical to subglobose, width twice 

 the height. Slight constriction at septum. Deutomerite stout-bodied, 

 nearly as wide as long. Widest at shoulder where it is very little wider 

 than protomerite. Posterior end truncate. Epimerite undescribed. En- 

 docyte dense in deutomerite, less so in protomerite. Nucleus not visible 



