562 OLIGOCHAETA 



Small-sized species with anteriorly placed first dorsal pore and with smooth 

 (unornamented) setae. 



B. scioana. B. moxicana. 



B. intermedia. B. karafuruensis. 



Small-sized species with anteriorly placed first dorsal pore and with penial setae 

 both smooth and ornamented. 



B. gracilis. B. bolavi. 



B. raalayana. 



Small-sized species (position of dorsal pore unknown) with smooth and ornamented 

 penial setae. 



B. pallida. B. culminis. 



Small-sized species (position of first dorsal pore unknown) with ornamented 

 penial setae. 



B. togoensis. B. equatorialis. 



B. godeffiroyi. 

 Moderate sized species. 



B. stuhlmanni. B. beddardi. 



Large species with smooth penial setae. 



B. itoliensis. B. rosea. 



Large species with ornamented penial setae. 



B. schlegelii. B. buttikoferi. 



Species without penial setae. 



B. inermis. 

 Small species with posteriorly placed first dorsal pore. 



B. buttneri. B. tennis. 



Species in which the above characters are unknown. 



B. affinis. 



(i) Benhamia schlegelii, HORST. 

 Acanthodrilus Schlegelii, HORST, Notes Leyd. Mus., vi, 1884, p. 103. 



Definition. Length, 350 mm. ; number of segments, 337. Spermiducal gland pores placed 

 within an oval circumscribed area as in B. rosea. Prostomium continued by grooves on 

 to buccal segment. Setae paired. Dorsal pores commence XIII/XIF or XIF/XV. 

 Gizzard single (?) ; three pairs of calciferols ytands in XV, XVI, XVII. Dorsal vessel 



