1914.] ^^ J. Stephenson : Oligochaeta. 385 



lished : — aa=^ah = Ibc ; ah == ^cd ; dd=^ circumference. Setae 

 a and b are absent on segment xviii. 



The body is rather constricted from segment xiii to xix, but 

 there is no other sign of a clitellum. 



The male apertures are situated on small papillae on the 

 middle annulus of xviii. The papillae embrace the interval ab ; 

 the interannular grooves, which bound the papillae in front and 

 behind, are rather more marked at this place than elsewhere. 

 Around and for a small distance internal to the papillae the skin is 

 coloured a f iint yellowish brown ; and between the papillae the 

 ventral surface of the segment is gently hollowed. 



The female apertures were not seen. 



The spermathecal apertures are small, in furrows s and f, 

 between the lines of setae a and b. 



The first septum is I ; it forms a deep cup, concave forwards, 

 in which the gizzard lies. Septa |-to are all thick, the rest 

 thin. 



The gizzard is in front of the first septum ; it is short, and 

 square in outline. There are no calcareous glands. 



The excretory system is meganephric. 



The last heart is in segment xiii. 



Two pairs of small seminal funnels were found free in seg- 

 ments x andxi; testes were not distinguishable in x, and not 

 certainly in xi. The seminal vesicles are two pairs, in xi and xii, 

 attached to the anterior faces of the septa (li and il) ; they are 

 of moderate size, rather flattened in an antero-posterior direction, 

 their surface incised (deeply in the case of the posterior pair) so as 

 to present a number of small lobes. 



The prostate is a coiled tubular structure, of small size 

 though extending through several segments. In segment xviii is 

 scarcely more than the duct ; the gland itself reaches back into 

 xxi. The duct is a muscular shining tube, forming a single rather 

 elongated loop in segment xviii, thicker at its termination than 

 elsewhere. 



No female organs were identified, except possibly an ovarian 

 funnel on the left side of segment xiii. 



The spermathe.cae (fig. 9) are situated in segments viii andix. 

 The ampulla forms a straight or bent cylinder, lying on the body- 

 wall, to which it is rather adherent, in an oblique position, its 

 anterior end being also internal. There is a small finger-shaped 

 or club-shaped diverticulum at its internal end. The duct is very 

 short, almost absent, and is situated on the under surface of the 

 ampulla nearer the inner than the outer end of the latter. The 

 situation of the diverticulum is thus some distance removed from 

 the duct. 



The penial setae (fig. 10) are -88 mm. long, 11 /x broad, and 

 without ornamentation ; they are almost straight for the greater 

 part of their length, but show a gentle wavy curve at their distal 

 extremity, the point of which is sharp. 



