291] STUDIES ON GREGARINES WATSON 81 



DACTYLOPHORUS ROBUSTUS Leger 

 [Figure 29] 



1887 Dactylophorus sp. Schneider 1887 :67 



1889 Dactylophorus sp. Balbiani 1889 :41 



1892 Dactylophorus robusta Leger 1892 :124-7 



1899 Dactylophorus robustus Labbe 1899:17 



1903 Dactylophorus robustus Leger and Duboscq 1903 :310-1 



Dactylophorus: Sporonts solitary, elongate. Length 700-800/t. 

 Width not given. Ratio length protomerite : total length : : 1 : 30. 

 Width protomerite : width deutomerite : : 1 : ^. Protomerite at top ap- 

 proximately twice as wide as deutomerite, broadest at top, six times as 

 wide as high. Periphery of upper margin set with numerous small up- 

 wardly directed digitiform processes which constitute the epimerite. Deu- 

 tomerite elongate, regularly cylindrical in anterior third then becoming 

 much narrower and ending in a long acuminate point. Nucleus ovoidal, 

 twice as long as wide, containing several karyosomes. Endocyte yellow. 

 Cysts spherical, 200/i in diameter, dehiscence by pseudocyst, spores cylin- 

 drical, rounded at ends, 11 by 4.3/x. 



Taken at Grenoble, France, and on the island of Corsica. Hosts 

 Cryptops hortensis Leach; Cryptops anomalous lusitanus Verh. Habi- 

 tat: Intestine. 



Labbe (1899:17) attributed the naming of the genus Dactylopho- 

 rus to Balbiani. The latter, however, says : 



"C'est d'abord une Gregarine que je crois nouvelle, a moins qu'elle ne soit 

 1'espece que M. A. Schneider dit avoir decouverte chez les Cryptops, et a laquelle 



il donne le nom de Dactylophorus . Cest sans doute la presence de cet ap- 



pendice qui a valu a notre espece le nom Dactylophorus, qui lui a ete donne par 

 M. Schneider." 



Balbiani described a polycystid gregarine from the digestive tract 

 of Cryptops sp. as follows: 



"La Gregarine a la forme d'tine massue etroite, etiree en une longue pointe 

 asa partie posterieure. Sa longueur moyenne est de 0.41 mm. et sa larguer, prise 

 dans la portion renflee du corps, de 0.035 mm - Le segment anterieur ou protomerite 

 est petit, connoide, et prolonge sur un de ses cotes, en un court appendice obtus 

 dirige en avant." 



Labbe considered this species identical with that later described by 

 Leger as D. robustus, probably from the fact that the specimens were 

 taken from the same chilopod (Cryptops). It is evident, however, from 



