DESCRIPTIONS OF GENERA AND SPECIES 571 



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by its greater size ; the dorsal pores, too, appear to commence earlier than in any 

 other species, with the exception of B. mexicana, with which the present cannot be 

 confounded, and B. sylvestris which it closely resembles. 



(24) Benhamia monticola, MICHAELSEN. 



B. monticola, MiCHAELSEN, Thierwelt Ost-Afrik. Regenw., 1894, p. 27. 



Definition. Length, 42 mm. ; breadth, 4 mm. ; number of segments, 109. Prostomium 



reaches to middle of buccal segment. Setae strictly paired. Dorsal pores commence 



T/VI. Penial setae with fine denticulations. Spermathecae with a single diverticulum. 

 llab. Runssoro, E. Africa. 



(25) Benhamia sylvestris, MICHAELSEN. 



B. sylvestris, MiCHAELSEN, loc. cit., p. 28. 



Definition. Length, 35 mm. ; breadth, y$mm.; number of segments, 81. Skin pigmented 

 dorsally. Clitellum, VIII-XX. Prostomium continued over half of buccal segment. 

 Setae strictly paired. Dorsal pores commence HI/IF. Gizzards in VIII and IX. 

 Calciferous glands in XV, XVI, and XVII. Last heart in XII. Sperm^acs in X, XI, 

 with process into XII. Penial setae with fine denticulations. Spermathecae with small 

 diverticulum. Hob. Runssoro, E. Africa. 



(26) Benhamia castanea, MICHAELSEN. 

 B. castanea, MICHAELSEN, loc. cit., p. 301. 



Definition. Length, 40 mm. ; breadth, 3^5 mm. ; number of segments, 63. Pigment on 

 dorsal surface. Clitellum, X1I-XX, Prostomium projects slightly into buccal segment. 

 Setae strictly paired. Dorsal pores commence V/VI. Calciferous glands in XV, XVI, 

 XVII. Penial setae denticulate. Spermat/iecae with one diverticulum. llab. Runssoro, 

 E. Africa. 



(27) Benhamia parva, MICHAELSEN. 

 B. parva, MICHAELSEN, loc. cit., p. 31. 



Definition. Length, 32 mm. ; breadth, 2 mm. Dorsal surface pigmented. Setae strictly 

 paired. Dorsal pores commence V/VI. Clitellum, XII-XX. Oviducal pore median. 

 Calciferous glands in XV, XVI, XVII. Penial setae ornamented with rklges. Sperma- 

 thecae with single diverticulum, bifid at extremity, llab. Duki, near Bataite. /;'. Africa. 



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