1920.] J. Stephenson: OKgochaeta from India and E. Persia. 245 



Genital markings are faintly visible in furrows 14/15, 15/16, and 16/17, in line 

 with a, as inconspicuous slightly pigmented spots surrounded by circular grooves. 



Internal Anatomy : — Septa 4/5 and 5/6 are moderately stout ; the next is 8/9, 

 which is somewhat displaced backwards ; this septum and the two following are 

 rather close together, and are all somewhat strengthened; 11/12 is absent, as in E. 

 waltoni and many others of the genus ; 12/13 is very thin, and is bulged backwards 

 to the level of 14/15 by the seminal vesicles ; the rest are also thin. 



The gizzard is barrel-shaped, situated in the long space between septa 5/6 and 8/9. 

 Calciferous glands are represented by an ovoid dilatation of the alimentary canal in 

 segment xii, with transverse vascular striations. The intestine begins in xv. 



The last hearts are in xiii ; those of xi are bound down by connective tissue to 

 the walls of the oesophagus. The dorsal vessel seems not to be continued forwards 

 beyond the gizzard, ending by giving a pair of commissures at the anterior end of 

 this organ. 



The micronephridia are arranged in a transverse row in each segment behind the 

 clitellum ; in the dorsal half of each segment there are pretty regularly three on each 

 side. 



The testis sacs are one pair, in segment xi ; they are separate from each other 

 and longitudinally elongated, lying by the side of the nerve cord. They are connec- 

 ted with the seminal vesicles in segment xii ; these are large, two-lobed, the lobes being 

 anterior and posterior ; each lobe is subdivided by further indentations ; they extend 

 back to the level of 14/15 by bulging back the septa. 



The prostates are small, occupying segments xviii and xix ; the coils are closely 

 packed. The duct is not markedly different from the glandular part ; it is scarcely 

 narrower, is soft, not shining, and passes forwards and inwards with an undulating 

 course. 



The female organs were not identified. 



The spermathecae (fig. 48) are elongated sacs lying longitudinally on the body- 

 wall, to which they are attached by a portion of their under surfaces ; a duct can 

 thus hardly be described, — it would at any rate be called very short and stout. The 

 diverticula are two, one on each side, attached to the junction of sac and duct by a 

 short relatively stout stalk ; each shows a lobulation which indicates the presence of 

 three or four seminal chambers. 



The penial setae (fig. 49) are in length up to 1*5 mm., and in thickness 35^; 

 the distal half is slightly curved, and the tip bluntly pointed and rather claw-like. 

 The ornamentation consists of very fine dot-like markings over the distal eighth or 

 tenth of the length of the shaft, including the tip. 



Remarks : — This species appears to be allied to E. chittagongianus ; the internal 

 anatomy is remarkably similar, and the chief difference between the two is in the 

 genital markings. Although the present specimens were possibly not quite mature, 

 it seems fairly safe to say that the markings differ in both character and position in 

 the two forms, 



