474 OLIGOCHAETA 



A single large genital papilla letween XIX/XX and XX/XXI. Intestinal glands of 

 consecutive segments fused. Hah. — Darjeeling. 



This species can be distinguished from the last by its greater bulk- It is true 

 that the measurements given appear to indicate a similar size ; but the specimens 

 of T. orientalis which I examined were much softened and extended, whereas those 

 of T. ganimii were retracted. T. gammii also seems to differ from the last species 

 in having no setae upon the second segment of the body. At the time that this fact 

 was mentioned by me there was no earthworm known in which the setae were absent 

 from any but the first segment ; I therefore mentioned it with greater hesitation than 

 it would be necessary to do now when so many species are known in which this 

 amount of ' cephalization ' is met with. The dorsal pores commence between the tenth 

 and eleventh segments. 



The first distinct septum lies between segments iv/v ; three thickened septa border 

 segments vii, ix, x posteriorly. The gizzard is in segments vi, vii ; the septum which 

 should divide these segments is absent, or at most is represented by two muscular 

 bands which tie down the gizzard to the parietes. These muscles also occur in the 

 last species. Accepting Bourne's corrections of my enumeration of the segments, 

 I should now refer the single pair of calciferous glands to the thirteenth instead of 

 to the twelfth segment. This segment also contains the last pair of hearts. I expect 

 that a renewed examination of the last species would show that there also the last 

 pair of hearts occupy the same segment. 



The single pair of testes in the eleventh segment are enclosed within a median 

 unpaired sperm reservoir. The two sperm-sacs are long, reaching back to the 

 seventeenth, segment ; the sperm-sacs are raceAose in form. The spermathecae have, 

 as in the last species, two diverticula ; but each of these is multifid instead of being 

 trifid. The shape of the penial setae distinguish this species from T. orientalis; their 

 free extremity is covered by numerous finely denticulate ridges, whereas in the last 

 species the extremity of the seta has fine obliquely running ridges which give it 

 a bipinnate appeai-ance. 



(3) Typhaeus masoni, Bourne. 

 T. Masoni, Bourne, J.Asiat. Soc. Bengal, vol. Iviii, p. ii. p. 112. 



Definition. Length, 1 30 mm. Setae paired anteriorly ; in posterior segments they come to he 

 separated. Oenital papillae paired hetween segments XV/XVI. XVI/XVII, XVIII/XIX, 

 XIX/XX. Four pairs of hilobed intestinal glands. Hah. — Behra Bun. 



