BY J. J. FLETCHER, M.A., B.SC. 401 



is intraclitellian. Setse at first 20 per segment, further back 

 usually 24, and quite posteriorly sometimes about 28 ; ventral 

 interval devoid of setae conspicuous throughout, about twice the 

 width of the interval between two setse ; dorsal interval at first 

 wider than an ordinary interval, but posteriorly not so. 



Two pairs of papillae on xviii, and a pair of copulatory papillae 

 on XVII and on xix ; on x a pair of rectangular raised areas with 

 a groove between them, extending outwards to about 4th seta on 

 each side. 



There is apparently a fourth pair of calciferous pouches in xill. 



In other respects this species is like P. austrina. 



Mab.—Mt. Wilson. 



Perich^ta fecunda, n. sp. 



Two (spirit) specimens from different localities are 74 and 65 mm. 

 long, 3"5 and 3 mm. broad, and comprise 108 and 115 segments 

 respectively. Body cylindrical, tapering slightly anteriorly, and 

 more gradually posteriorly ; colour darker above, especially anteri- 

 orly ; when alive an iridescent steel-blue. Prostomium nearly 

 divides the buccal ring, the latter inferiorly marked with a median 

 longitudinal groove. 



Setse for about the first three setigerous segments 20 per segment, 

 increasing to 24 just about the clitellum, with 28 a little way 

 behind it, and about 30 per segment in the posterior region. 

 Sometimes a few more setse are visible on one side of a segment 

 than on the other. Ventral interval devoid of seta? noticeable 

 throughout, about twice the width of the space between two setse ; 

 the dorsal interval anteriorly a little wider than that between two 

 setse, posteriorly not noticeable. 



Clitellum complete, comprising three entire segments xiv to xvi 

 and slightly involving xiii and xvii (in one case about half). 



Male pores on xviii, about in line with the interval between 



first and second setse on each side. Oviduct pores two, close 

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