293] STUDIES ON GREGARINES— WATSON 83 



Labbe (1899:17) says KoUiker's (1849:35) Gregarina scolopendra, 

 from Scolopendra morsitans Sieb. is probably the same gregarine as the 

 above. But the protomerite is very different from that of the genus Nina 

 and indicates at once Labbe 's error. KoUiker gives no description of the 

 epimerite and it is impossible to say in what genus his specimen should 

 be placed. His drawing is reproduced in my Figure 48. 



Leger and Duboscq recognize the species and fully discuss its cyst 

 formation. 



NINA GIARDI (Leger) Sokolow 



1899 Pterocephalus Giardi Leger 1899 :390-3 



1900 Nina giardi Sokolow 1911 :281 



Nina : Sporonts solitary, elongate. Length 4 mm. Width not given. 

 Protomerite very broad at the upper extremity, bilaterally symmetrical, 

 consisting of two long parallel horizontal lobes separated at one extrem- 

 ity and upturned at the other, with a small vesicular body near this end. 

 Each lobe set with a row of short upwardly directed teeth from which 

 project long slender sinuous filaments. Deutomerite long, slender, cylin- 

 drical, tapering slightly at the posterior extremity and ending bluntly. 

 Cysts spherical. Spores with two envelopes, 14 by 7/t. 



Taken at Wimereux, Pas-de-Calais, France. Host: Scolopendra 

 oraniensis (africanaYerh.) Habitat: Intestine. 



NINA GIARDI CORSICUM (Leger and Duboscq) Sokolow 



[Figure 31] 



1903 Pterocephalus Giardi corsicum Leger and Duboscq 1903a :333 

 1911 Nina giardi corsicum Sokolow 1911 :281-2 



Nina: Sporonts solitary, very elongate. Length 2/x. Width not 

 given. Ratio length protomerite : total length : : 1 :10. Ratio width pro- 

 tomerite : width deutomerite : : 4.5 : 1. Protomerite bisymmetrical, 

 formed by two long horns which meet at one end and curve upward 

 nearly 90°. Very wide, 4.5 times maximum width of deutomerite. Ex- 

 tending beyond the deutomerite three times as far on one side as on the 

 other. The periphery of the horns densely set with a row of small 

 denticles with long slender filaments. The shorter lobes thick and 

 blunt. A pseudo-nuclear vacuole near the apex of the opposite lobe, i. e. 

 at the end of fusion. Protomerite transparent. Deutomerite regularly 



