24 



SJÖSTEDTS KILIMANDJAEOMEEU EXPEDITION. 22: 3. 



than sixty. The submedian papillae are digitale and curve slightly inwards, they end 

 quite simply without knob terminaüons. 



The wall of the mouth capsule is almost uniformly thickened, its cavity when seen 

 from the ventral surface is almost as deep as it is wide. There is no dorsal gutter. 

 The excretory pore is situated very far back as in C. auriculatum, just beyond (0,6 mm.) 

 the posterior limit of the Oesophagus. The Oesophagus is somewhat short (0,53 mm.) and 

 thick. The bursa in all the males is folded inwards ventrally and resembles a closed 

 fist with the three middle fingers semi-extended. The median, posterior, lobe is w^ell 

 developed and has a subsidiary lobe on either side supporled by the externo-dorsal ray. 

 The posterior rays number six in all, the two forming the internal pair are separated 



Figs. 1—5. Cyliehnostomum pugnicaudatum n. sp. 

 Fig. 1. Anterior extremity showing general arrangement of mouth parts Oesophagus and excretory pore (eamera Ineida 

 diawing). — Fig. 2. Mouth eapsule under greater magnification. — Fig. 3. Posterior extremity of female showing 

 Position of Vulva and anus. — Fig. 4. Externa! lateral view of the bursa in the male. — Fig. 5. Bursa seen from 



ventral aspect, one spicule shown with tvisted tip. 



by a deep cleft. The two outer rays on either side of the internal pair are fused 

 together for practically half of their course to the border of the lobe. The three median 

 rays of the lateral lobes terminate at an almost equal distance from one another. The 

 two anterior rays remain in dose association to their Ups. 



The two spicules are 1,55 mm. in length; have no hooks at their tips but exhibit 

 in all specimens a curious twist at about O.15 inm. from their free extremities. 



The genital cones are practically undeveloped in this species. 



The posterior extremity of the female is much drawn out and the anus (0,8 mm.) 

 and Vulva (1,45 mm.) are an unusually long way from the tip of the tail and also from 

 one another (0,65 mm.) The body changes markedly in diameter at the level of the vulva 

 and this region resembles a hand firmly closed upon the thumb with the forefinger fuUy 



