60 AVIAN CESTODES, 



the genitaLf;loaca, which is a relatively deep and narrow passage 

 of 0'025 mm. long by 0007 mm. broad. The male duct opens 

 just below and in front of the female opening. 



liody-waU, Musculature, etc.: — The cuticle when examined in a 

 transverse section of a segment was seen to be rather thin and 

 almost homogeneous, stratification being scarcely recognisable. 

 It stained deeply. Immediately below it there could be distin- 

 guished a clearer zone representing the narrow basement-mem- 

 brane. This was succeeded by the various subcuticular layers, 

 the outermost of which was thin, and, though some structures 

 could be just seen (using yV immersion lens) in it, their nature 

 could not be made out. Probably, they represented the outer 

 layer of cii'cular muscle fibres mentioned by Blochmann. 



The subcuticular cells were very well developed, and possessed 

 the typical spindle-shape. They formed two or three indefinite 

 rows. A deeply staining nucleolus was present. In addition to 

 these cells and just internally to them, there were noticed several 

 branching cells, which appear to represent the myoblasts shown 

 in Blochmann 's figures. 



Between the subcuticular cells one could see the small bundles 

 of the outer longitudinal muscles. The ring longitudinal muscles 

 were located, as usual, in the cortex, and consisted of two con- 

 centric series of bundles near each other. The bundles contained 

 few fibres, and were relatively weak, though those belonging to 

 the series nearest the transverse muscles were much larger than 

 those situated more externally. The transverse fibres enclosed a 

 rather narrow medulla between them, the ovarian bridge border- 

 ing on the ventral layer and the upper series of testes on the 

 dorsal layer. They were seen to pass out laterally beyond the 

 nerve through the subcuticula for insertion. The dorso-ventral 

 muscle-strands were moderately developed, but did not show any 

 peculiarities. 



Excretory Syi^tem : — Only one pair of longitudinal exci'etory 

 vessels is recognisable, these representing the ventral pair. Each 

 has a very wide lumen, being about 006 mm. in diameter. These 

 trunks are situated deeply in the parenchyma, at about half-way 



