IQI4.] J. Stephenson : Oligochaeta. " 381 



A third characteristic feature of the area is the presence of 

 four small papillae, or nodular wart-like projections immediately 

 lateral to the anterior and posterior limits of the longitudinal 

 portion (not the oblique portion) of each of the grooves. Compar- 

 ing what was said above as to the extent of the grooves, it will 

 be seen that these wart-like projections occupy approximately the 

 situation of furrows r? and \l, in the position ah. A number of 

 setae are absent on segments xvii and xviii. 



The above description of the genital area is taken from the 

 specimen first examined (Upper Rotung, 5-1-1912), A few differ- 

 ences in detail characterized the specimen selected for examina- 

 tion from Rotung, 2i-xii-i9ii (fig. 4) ; the oblique portions of the 

 grooves were shorter and more directly transverse in direction ; 

 the warts were larger, and might indeed be described as ' tags', 

 i.e. they were more or less rounded bodies attached by a narrow 

 base ; and the pigmentation was less intense ; only setae a and h 

 of xvii were missing. 



The male apertures were not discoverable in the first speci- 

 men ; in that last referred to they were minute pores, in the 

 course of the grooves and in the situation of the missing setae a of 

 segment xvii. 



The female apertures appeared to be paired, and situated in 

 minute grooves just in front of setae a of xiii ; but this was only 

 made out in one specimen, and is doubtful 



The spermathecal apertures are very minute, in furrows y and 

 i, in or (Rotung, 2r-xii-i9ii) well internal to the line of setae a. 



In front of the first definite septum is a series of muscular 

 layers and bands extending between the body-wall and pharynx, 

 of which latter they act as dilators and retractors. Septa f-11 

 are all much thickened ; f and the succeeding two or three are 

 attached to the alimentary canal at a level much posterior to their 

 parietal insertion. After ii the next few septa are slightly and 

 diminishingly thickened, and the rest are thin. 



The gizzard is large, barrel-shaped, in front of septum f, but 

 corresponding externally to segments vii, viii and ix ; thus sep- 

 tum f is attached to the oesophagus at the level of furrow to. 



Calcareous glands are present in segments ix, x, xi and xii 

 (absent in x in one specimen) ; they are transversely elongated, 

 somewhat sausage-shaped, and attached to the anterior faces of 

 the septa to-tI within the curve of the hearts. The intestine 

 begins in xiv. 



The last heart is in segment xii. 



The excretory organs are micronephridia ; these are very 

 small, and are best seen in the anterior part of the body as tufts 

 in and in front of segment vi. They are scattered irregularly on 

 the body-wall ; apparently few occur between segments vii and 

 the clitellum. There are no meganephridia in the posterior part 

 of the body. 



There are two pairs of testes, situated in segments ix and x ; 

 these are placed deeply in the segment, and each consists of a 



