259] STUDIES ON GREG ARINES— WATSON 49 



Stenophora cockerellae Ellis Parajulus sp. 



Stenophora elongata Ellis Orthoniorpha coarctata (Sauss.) 



Stenophora impressa Watson Parajulus impressus (Say) 



Stenophora lactaria Watson Callipus lactarius (Say) 



Stenophora diplocorpa Watson Eiiryurus erythropygus (Brandt) 



Cneniidospora lutea Schneider Glomeris sp. 



Amphoroides polydesmi (Leger) Labbe Polydesmus complanatus (L.) 



Polydesmus dispar Silvestri 



Amphoroides calverti (Crawley) Watson Callipus lactarius (Say) 



STENOPHORA LARVATA (Leidy) EUis 

 [Figure 1] 



1849 Gregarina larvata Leidy 1849:232 



1851 Gregarina larvata Diesing 1851:553 



1853 Gregarina juli marginati Leidy 1853 :237 



1863 Gregarina juli Lankester 1863 :94 



1875 Stenocephalus juli Schneider 1875:584-5 



1899 Stenophora juli Labbe 1899:15 



1903 Stenophora juli Crawley 1903 :51 



1904 Stenophora iulimarginati Leger and Duboscq 1904:362 

 1913 Stenophora larvata Ellis 1913a :286 



Stenophora: Sporonts solitary, elongate. Maximum length 800/x, 

 maximum width 2Zfi. Ratio length protomerite : total length :: 1 : 

 20; width protomerite : width deutomerite :: 1 : 2. Protomerite 

 small, subglobular, slightly flattened top and bottom, a flat circular 

 papilla at apex with an apparent pore in center. A conspicuous con- 

 striction at septum. Deutomerite elongate-cylindrical, tapering gradu- 

 ally from center to an acute but bluntly pointed cone. Endocyte of 

 protomerite clear, granular; of deutomerite dense and opaque. Nucleus 

 small, spherical. 



Taken at Philadelphia, Pa. Host: Spiroholus spinigerus Wood 

 (Julus marginatus Say). Habitat: Intestine. 



This species was observed by Leidy in 1849 and was the first gre- 

 garine he observed. His general statement regarding the parasite is 

 quoted here nearly in full on account of its quaintness. 



"Gregarina is probably the larva condition of some more perfect animal, 

 but in the ii6 individuals of Julus which I have examined, I have not been able 

 to detect any form which could be derivable from it. Creplin doubts its animal- 

 ity. ... I detected movements of an animal character, and this led me to 

 seek for muscular structure, which resulted in the discovery of the longitudinal 

 lines of the inferior cell. These escaped the observation of Siebold . . . 

 In the state in which Gregarina is found, it would probably hold a rank between 

 the Trematoda and Trichina, the lowest of the Nematoidea." 



To Leidy, then, must be attributed the discovery of the longitudinal 



