HELMINTHES : COLOMBO MUSEUM. 179 



occurs in the middle between the second and third testes. The 

 eggs have a triple membrane, the outer irregular, 0-047 ; the 

 oncosphere is 0*026 long x 0-018 broad. 



Dipylidiurn. 



Rostellum with several circlets of rosethorn-shaped hooks ; 

 genital pores marginal and bilateral; genital organs in each pro- 

 glottid duplicated ; testes numerous ; parasitic in mammals. 



^2.— Dipylidiurn caninum, Lin. 



Intestine of Ca7its fcuniliai'is ; Colombo. 

 Of. A. Railliet, 023. cit., pp. 284-290. 



43. — Tcenia, spec. ? 



Intestine of Haliastur indus, Bodd.; Nedunkeui. 

 Defective fragments without scolex, indeterminable. 



Diorchis. 



Scolex with simple crown of hooks ; in each member two 

 testes ; genital pores marginal and unilateral ; the mature uterus 

 fills the proglottids completely ; parasitic in birds. 



44. — Diorchis occlusa, n.sp. 



PL II., figs. 26-27. 



Intestine of the Flamingo, P/ioen/co^J^erMsroseMS, Pall.; Weligatta. 

 Length 75 mm. ; the body is thick, ovate in cross section, the 

 dorsoventral diameter is to the transverse as 7 : 9 ; formation of 

 proglottids commences at once behind the scolex ; anterior 

 proglottids 0-40 broad x O'OIS long, posterior 0-97 broad x 0*18 

 long, the breadth always exceeding the length and the contours 

 serrate. 



The scolex, 053 broad, is triangular in profile ; the rostellum 

 is in some cases retracted, in others protracted, appearing short 

 and broad ; it carries eight hooks, 0*14 mm. long ; the root-branch 

 is shorter than the hook, in the proportion 25 : 29 ; at the base 

 there is a small finger-shaped prolongation, and the concavity 

 thus produced articulates with a roundish body, eight of which 

 occur in a circle at the summit of the rostellum. 



Genital pores absent ; male and female ducts fuse together on the 

 same side in all segments at a distance of 0*03 from the margin ; 

 radial bundles of longitudinal muscles occur not far from the 

 cuticle ; calcareous bodies are present in small quantity ; on each 



2 B 8(17)05 



