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The Adult Organisation of Paragordius varius (Leidy). 
By 
Thos. H. Montgomery jr. 
(University of Pennsylvania, Philadelphia.) 
. With plates 37—43. 
Paragordius varius is the most abundant species of Gordiacean 
in the eastern portion of North America, and on this account was 
selected for study. In the vicinity of Philadelphia, however, it is met 
with only infrequently and appears to be irregular and sporadic in 
its occurence. In the last parasitic stage I have found it in the ab- 
dominal cavity of Acheta (Gryllus) abbreviata only. In addition 
to the specimens secured by myself, and to those, in the Leıpy 
collection, I am indebted to the following gentlemen who have sent 
me specimens and to whom I would here express my thanks: to my 
colleague, Prof. E. G. CoNKLIN, to Professors H. S. JENNINGS and 
J. REIGHARD of the University of Michigan, to Prof. W. M. WHEELER 
of the University of Texas, to Prof. Utrey of Manchester College, 
Indiana, and to Mr. C. W. JoHnson of the Wagner Institute, Phila- 
delphia. 
The group of the Gordiacea, with the exclusion of the genus 
Nectonema VERRILL, comprises the following distinct genera: Gordius, 
Chordodes, and Paragordius; a fourth genus has been established by 
CAMERANO (1897b) under the name Parachordodes; but it is certainly 
very close in its characteristics to Gordius, and until more important 
differences are found between the two than those mentioned by CAME- 
RANO, we are hardly justified in assigning it separate rank. The genus 
Paragordius was founded by CAmMERANO (1897b), and the same name 
proposed by me for the same species independently a short while 
after. In this paper (1898) I pointed out briefly and figured the most 
characteristic feature of Paragordius, namely the exceedingly long 
cloaca in the female. So far this is the only anatomical account of 
this genus. 
