BY J. J. FLETCHER. 1015 



Hah. — The County of Cumberland ; Springwood, Blue Mts., 



N.S.VV. 



Perich^ta dorsalis, F1., I.e. (2) II, (1887), p. 618. 



A good series of 35 specimens of various sizes, some very 

 successfully killed in a fairly extended condition by Mr. Smith, 

 comprising examples from 60 mm. long, 3 mm. broad (juv.) to 

 192 mm. long, 5-7 mm. broad; number of segments about 135. 



Setae : the full number (probably about 16) not present on the 

 first setigerous segment (ii) in any of the specimens, though a few- 

 have six setae visible on at least one side of the body ; the first 

 and second (counting from the ventral ends of the half series) are 

 rarely absent, and these may be the only ones visible ; the next 

 few segments usually have 16, increasing to 20 about segment vi ; 

 in one of the original specimens there are 12 on one side of 

 segment xii, but this number is exceptional so far forward ; still 

 further back, except on about the last six or seven segments which 

 are smooth, there may be about 30 or a few more. Fewer setse 

 than the numbers specified may be met with. The statement that 

 the dorsal interval devoid of setae is somewhat narrower than the 

 ventral one applies only to the posterior region, or elsewhere only 

 to particular individuals ; as a rule anteriorly the dorsal interval 

 is much broader than and not so well defined as the ventral one, 

 its bounding rows of setse not being straight since the setse are 

 not always at equal distances apart even on the same segment, or 

 that some of them are absent, or posteriorly to the increasing 

 number of setae. The ventral interval is well-defined, its bounding 

 rows straight and regular, the setae in this region without the 

 varying tendency to be absent so characteristic of those in the 

 dorsal region. Even in young worms without clitella or papillae 

 however the first two or three setse on each side of the ventral 

 surface of xviii are not visible, and are probably normally absent. 



Genital pores : in worms in which the papillae are not much 

 developed the male pores are two conspicuous slit-like pores a 

 little dorsad of what would be the position of the second seta on 

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