394 On the Reproductive Organs o/'Phreoiyctes. 



paired character of the setae. There is, however, evidently a 

 close agreement, if not identity, between the reproductive 

 organs of this species and of P. Menkecmus, and in most other 

 points of structm-e they agree ; so that I am not disposed to 

 create a new genus, at least for the present. 



The facts which I have been able to record in this paper 

 confirm the justice of separating Phreoryctes as the type of a 

 distinct family, as has been done by Glaus and Vejdovsky. 



Vejdovsky's definitions may be thus amended : — 



Fam. Phreoryctidse, Glaus. 



Long slender worms, the body made up of numerous seg- 

 ments; prostomium divided into two by a furrow; setse in 

 four rows, a single seta or a pair of setse )o each row, f-shaped, 

 not bifid. Nephridia persistent in the segments behind those 

 containing the reproductive organs, opening on to the exte- 

 rior behind, or in front of, the ventral setse. Testes in segments 

 ten and eleven ; ovaries in segments twelve and thirteen ; 

 four vasa deferentia opening on to segments eleven and twelve 

 between dorsal and ventral setse ; four oviducts opening 

 between segments twelve and thirteen, and thirteen and 

 fourteen. Spermathecas, two to three pairs in front of testes, 

 in segments seven, eight (nine). 



Genus Phreoryctes, Hoffmeister. 

 With the characters of the family. 



Species : — 



(1) Phreoryctes MenkeanuSy Ley dig. 



Excessively slender, reaching to the length of 1 foot. 

 Setse in four rows of a single seta each ; ventral setse stouter 

 than dorsal. Three pairs of spermathecse in segments seven, 

 eight, and nine. Nephridia opening in front of setae. 



(2) Phreoryctes JiUformisy Vejdovsky. 



Slender, but smaller than P, Menkeanus. Setse in four 

 rows of a single seta each, the dorsal setse longer than the 

 ventral. Nephridia open behind setse. 



(3) Phreoryctes Smithii^ n. sp. 

 Much shorter than either P. Menkeanus or P. Jiliformis. 



