564 OLIGOCHAETA 



This is a species about -whose distinctness there can be no doubt; it may be 

 distinguished from any other Benhamia by the ' copulatory apparatus ' in the 

 vicinity of the spermathecae ; an apparatus of this kind is found in a few species 

 of Acanthodrilus. 



(4) Benhamia scioana (ROSA). 

 Acanthodrilus scioanus, ROSA, Ann. Mus. Civ. Genova, vol. vi (2 a), 1886, p. 586. 



Definition. Length, 70 mm.; breadth, 3 mm.; number of segments, 100. Clitellum, 

 XIII-XIX, with a median ventral area upon XVII XIX. Setae strictly paired. Dorsal 

 pores commence Y/V1. Gizzards in V, VI ; calciferons glands in XI', XVI, XVII ; 

 intestine begins in XIX and is without a typhlosole. Dorsal vessel single (?) ; hearts of 

 XI and XII are the largest. Penial setae present and without sculpturing. Sperm-sacs, 

 two pain in XI, XII ; these are connected, as in B. beddardi, with a median space 

 occupying segments X, XL Egg-sacs present, but rudimentary. Spermathecae with a 

 single small diverticitlum. Hob. S/toa, Abyssinia. 

 Apart from a slight difference in size I do not see how to differentiate this 



species from B. intermedia; that they are different is probable from their occurrence 



on opposite sides of the African continent. 



(5) Benhamia rosea, MICHAELSEN. 

 B. rosea, MICHAELSEN, JB. Hamb. wiss., Anst. vi, 1889, p. 6. 



Definition. Length, 540 mm.; breadth, ioj mm.; number of segments, 400. Reddish 

 pigment in skin. Clitellum, XIII-XXII, saddle-shaped. Spermiducal gland pores 

 enclosed by a ridge of oval contour, extending from the middle of segment XVI to the 

 end of segment XIX. Prostomium broad and large, but not continued on to bnccal 

 segment. Setae very small and strictly paired. Dorsal pores begin between XI/XII. 

 Gizzards in VII, VIII, and IX (?). Penial setae without ornamentation. Spermathecae 

 with numerous minute diverticula imbedded in muscular wall. Hal. Gaboon and 

 Leibange, West Africa. 

 The close appi'oximation of the male pores appears to distinguish this species from 



its allies except B. schlegelii (q. v.) ; it is moreover the largest member of its genus. 



(6) Benhamia stuhlmanni, MICHAELSEN. 

 B. Stuhlmanni, MICHAELSEN, loc. cit., vii, 1890, p. 5. 

 Definition. Length, 140 mm.; breadth, 6 nun.; number of segment*, 187. Clitellum, 



