Entozoa from Birds in Uyanda. 403 



12 ^ ^'^'igj Hiarly nil oE which, however, have been lost. The 

 rostelliim inoasureB 0"08 iiiiii. in (Jiuiuetor and boar.s an 

 enormous miinl)or of extroincly miiuite hooks, the lenj^th of 

 whii'li is ahoiit 8 /i. 



TliH neck, which is well exteniled, i.s nnsegmpntcJ for a 

 distance of ahont 12 nun. I)chin<l the scolex. The mature 

 so^rnonts (much contradcl) are extremely short and hroad, 

 and have greatly overlapping; margins post<'riorly and laterally. 

 The longitudinal musculature is very powerfully developed 

 dorsally and ventrally, consisting of a thick layer of irregu- 

 larly anastomosing fibres. 



The ventral excretory vessels are connected at every 

 segment by a transverse vessel, which is about half as wide 

 as the medullary portion of the segment itself. 



Tiiere are twenty or more testes in each mature segment, 

 extending in a series right across the medullary parenchyme. 

 The cirrus-sac and vagina open into a common genital 

 ch>aca (tig. 4, Cl.\ th« proximal |)ortion of which has a verv 

 thick muscular wall, and the distal portion is non-inuscul.ir. 

 The muscular portion is about O'OG mm. long, the iion- 

 nuHCular about 0'05 mm. The dimensions of the cirrus-sac 

 are 0"125 mnt. x 0*06 mm. 



The gravid segments contain numerous ogg-capsulea 

 enclosing four or five eggs each. The onchospheres measure 

 only about la fi in diameter. 



6. Daviiinea sp. 



Host : Blffa pallidigula. 



There is a single fragmentary specimen from this bird, 

 to which, owing to its incompleteness, it is not proposed to 

 attach a specilic name. 



The length of the fragment is about 15 mm. and its greatest 

 width 0*9 mm. The scolex (contracted, and with retracted 

 ro.ctellum) measures 0'2o mm. across. The diameter of the 

 Huckers is 0'075 mm. and that of the rostellum about 01 mm. 

 Tlie size of the hooks on the rostellum has not been made 

 out ; thoso on the suckers arn about 1!J ^ long. 



The neck (ralher contracted) is unsegniented for about 

 0*4 mm. behind the scolex. The segments are broader than 

 long throughout the fragment, which, however, lacks gravid 

 segments. 



The earliest rudiments of genital organs a])pear at about 

 the ninetieth segmenth. The genital pores are strictly 

 unilateral. The testes number twenty to twenty-five, and 

 are arranged mainly in two lateral grouj)s, with a single row 



