170 



MEMOIFS OF THE QVEEXfiLAND MUSEUM. 



The genital ducts alternate irregularly, opening near the jimction of the first 

 and second thirds of the proglottid margin. A genital papilla is absent though there 

 is a relative] J- long narrow cloaca. 



The musculature is strongly developed, especially the longitudinal, which 

 occupies a coni*iderable portion of a transverse section (figs. 3 and 4) and consists of 

 a very large niuuber of small closely arranged bundles forming a zone several bundles 

 in thickness, the largest being situated most inwardlj% next to the transverse fibres. 

 The latter are particularly develojied in the anterior and posterior regions of each 

 segment (tig. 1 Ir. m.). Dorso-ventral fibres are rather weak. Calcareous corpuscles 

 do not appear to be abundant. They measure seven to eight micra in diameter. 



t. V.Sim 



Fig. 3. — Poro-beariiig edge of segment in travsverao section. 



Fig. ♦. — ^The opposite edge in transverse section, c.s., cirnis sac ; d.v., dorsal vessel ; 

 d.v.f., doreoventral muscle fiV'res ; e., eggs ; f/.cl., genital cloaoa ; i.v.^em., internal vesieula semin 

 alis ; l.m., longitudinal muscle fibres ; l.n., longitudinal nerve ; tr. m., tran.sverso nnisclo fibres ; 

 ut., uterus ; votj., vagina ; v.v., ventral vessel. 



The excretory system of each side consists of a large thin- walled ventral canal lying 

 close to the transverse musculature, and of a very narrow dorsal vessel, difficult to 

 recognise in sections, situated adjacent to the outer edge of the mature uterus. • The 

 transverse canals are wide. The main longitudinal nerve is relatively large. The sex 

 canals pass outwards above it and both excretory vessels. 



