1914-] ^ J.Stephenson: OUgochaeta. 387 



minutely, the intersegmental grooves are seen to be pale, as are 

 also the crests of the ridges along which the setae are set, while 

 the intervening areas, constituted mainly by the slopes of the 

 setal ridges, are a deep purple ; a cross-striped or annulated 

 appearance is thus produced. Segments 198-230 ; no secondary 

 annulation, except, behind the clitellum, that constituted by the 

 keel-like ridges bearing the setae. 



Prostomium large, broad, epilobous f. 



First dorsal pore in furrow '^ \ all very distinct. 



Clitellum xiii-xvii = 5; segment xii slightly modified also. 

 Intersegmental grooves not obliterated, and circles of setae 

 present. The characteristic colouring maintained over the clitel- 

 lum, only rather paler than elsewhere. 



The setal rings are continuous or nearly continuous ventrally 

 behind the clitellum ; and in front of the clitellum also, though 

 there is some irregularity with occasional gaps here and there, 

 there is no regular midventral interval. Dorsally the median 

 interval is more constant [zz = i^-2yz) ; but the arrangement is 

 not absolutely regular. The intersetal distances are on the whole 

 a little greater dorsally than ventrally, but the difference is not 

 marked. Numbers of setae : — 55/iv, 74/ix, 82/xiii, 70/xix, 

 70/xxvi. 



Male apertures moderately close together, distant from each 

 other about \ of the circumference (about ^ in the softened speci- 

 men, where the ventral depression has become flattened out), at 

 the middle of the lateral boundaries of a mid-ventral rectangular 

 depression on segment xviii. The depression extends the whole 

 length of the segment, from the anterior to the posterior limiting 

 groove, and is about i|- times as broad as long. The floor of the 

 rectangle, and the lateral walls of the depression, are wrinkled by 

 small fissures, mainl}^ longitudinal and transverse in direction. 

 No genital setae were visible, and there were no setae on the floor 

 or the lateral walls of the depression. 



The female pore or pores were not visible. 



The spermathecal apertures are three pairs, minute and 

 difficult to see, in furrows r, I and ^; they are distant from each 

 other about fy of the circumference, and the posterior pair were 

 opposite the ninth seta from the midventral line. 



There are no other genital marks. 



A large number of septa in the anterior part of the body are 

 more or less thickened, as compared with the very delicate dis- 

 sepiments of the post-clitellar region. The septa from the anterior 

 end as far as t,,. and ts-y^, may be called slightly thickened, and 

 Ti-TT moderatel}^ thickened. After the first few segments none 

 are missing. 



A gizzard is present in segment vii ; it is soft, and flattened 

 dorso- ventrally, thus differing from the firm ovoid or barrel- 

 shaped mass seen in allied genera ; and, though of some size, it 

 must be called rudimentary. The oesophagus is much bulged in 

 segments xiii, xiv and xv ; the anterior of these bulgings have 



