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 T/Vl. Gizzards in V, VI; calciferous glands in XV, 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 pairs in XI, XII ; these are connected, as in B. beddardi, with a median space 

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

 single small diverticulum. Ilab. — Shoa, 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, loj mm.; number of segments, 400. Reddish 

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

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

 end of segment- XIX. Frostomium broad and large, but not continued on to buccal 

 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. Hah. — Gaboon and 

 Leibange, West Africa. 

 The close approximation of the male pores appears to distinguish this species from 



its allies except B. scfdegdii (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 m?n.; number of segments, 187. Clitellum, 



