48 ILLINOIS BIOLOGICAL MONOGRAPHS [48 



Diesing (1851) named the species Gregarina praemorsa from the 

 originally observed material and contributes no new observations. In 

 1859 he merely reports "Individua solitaria (Redi)." 



As stated under Cephaloidophora conformis, Leger and Duboscq (1908) 

 do not credit Redi's observations as referring to authentic gregarines but 

 give to Calvolini (1787) the honor of having first seen and recorded un- 

 doubted specimens of this group. Rudolphi does not mention Cavolini 

 in connection with the present species, however. 



Leger and Duboscq (1908 and 1909a) merely mention the species by 

 name in a list with this heading: 



Le genre Frenzelina comprend ainsi actuellement les especes suivantes: 



Sokolow lists it with the authentic species of the genus Frenzelina, not 

 with a group of uncertain species. 



Thus there is no record of positive data concerning the actual existence 

 of this parasite as a gregarine. No description or drawing is extant. 

 It is remarkable that the mere reference has held its place in literature 

 for over two hundred years. 



[? clausii Frenzel] 

 [Figure 69] 



1879 ? Claus 1879: 78 



1885 Gregarina Clausii Frenzel 1885: 575 



1899 Gregarina clausi Labbe 1899: 37 



1903 ''Gregarina'' clausi Minchin 1903: 331 



Sporonts solitary, ovoidal, 100/x in maximum length. Ratio LP : 

 TL::1:5.5; WP : WD :: 1 : 1 . 5. Epimerite unknown. Protomerite 

 domeshaped, striated longitudinally. Deutomerite widest at shoulder, 

 tapering to a rounded point. No constriction at septum. Chromidial 

 bodies in protomerite. Nucleus spherical. 



Solitary encystment within two thick hyalin cyst-walls. Cysts and 

 spores not described. 



Intestine of Phronima sp., Phronimella sp. 



Taken at Naples. 



The position of this species cannot be determined from the known 

 data. Inclusion within the Cephaloidophoridae is doubtful from the 

 solitary encystment. 



[? nicaeae Frenzel] 

 [Figure 70] 



1885 Gregarina Nicaeae Frenzel 1885: 578 



1899 Aggregaia nicaeae Labbe 1899: 6 



1903 Aggregata nicaeae Minchin 1903: 330 



