56 MR. F. E. BEDDARD ON [Feb. 4, 



fourteenth, and extending over three to six segments. (iizzard 

 always present and single ; intestines frequently provided with a pair 

 of conical caeca. Nephridia generally diffuse. Spermathecse nearly 

 always' furnished with one or more diverticula; atria (prostates) 

 always present, and sometimes penial setae. 



(1) Genus Perich.eta, Schmarda. 



Setae numerous, and forming a continuous or nearly continuous 

 row round all the segments of the body ^. Nephridia diffuse, with 

 many external pores in each segment. Atria (prostates) branched 

 and lobate. Dorsal pores present (? always). Penial seta3 some- 

 times present. 



Distributio7i. World-wide, especially tropics of Old World and 

 Australia. 



Subg. 1. Perich.eta (Beddard). — Line of setae continuous; 

 clitellum consisting of 3 segments only (14-16). One or 

 more pairs of intestinal caeca. Gizzard posterior to 7th 

 segment, occupying 2 segments, the septum between which 

 has disappeared. 



Subg. 2. Megascolex^ (Beddard). — Line of setae interrupted ; 

 clitellum occupying more than 3 segments. Caeca generally 

 absent. Gizzard usually situated in, or in front of, segment 

 7; occupjiugonly one segment. 



(2) Genua Perionyx, Perrier. 



Setae forming a continuous row round each segment ; generative 

 pores closely approximated in middle ventral line ; atria (prostates) 

 lobate ; nephridia paired ; dorsal pores present. 



Distribution. India and Burmah. 



(3) Genus DiporocHjEta, gen. nov. 



Setae forming a continuous row round each segment ; atria 

 tubular ; nephridia paired. 



(For P. 710VCE zelandi(e and perhaps P. baker i.) 

 Distribution. Austraha and New Zealand. 



(4) Genus Anisoch^ta, gen. nov. 



Setae 8 in number per segment anteriorly, afterwards increasiig 

 up to 30 ; nephridia diffuse ; atria lobate. 

 (For P. atteiiuata, P. enoimis, and P. coxii.) 

 Distribution. Australia. 



^ The only exception appears to be Mcgascoleje cceruleus; but this matter 

 requires reexamination. 



- Except of course the peristomial segment. 



^ N.B. — These divisions will not do unless Prof. Bourne finds, as he has 

 thought possible, that such species as P. biirliarcnsu and J", hulikuhiisk should 

 be separated as distinct genera. 



