306 
Tapeworms of Poultry 
there are three layers of testes extending from the dorsal to the ventral surface 
and thinnest in the centre where there is only a single layer on the dorsal 
surface. Laterally the testes surround the ventral excretory canal and extend 
as far as the nerve. There is also a small group of testes situated between the 
ovary and the excretory canal. The anterior portion of the proglottis is 
entirely free from them. The cirrus-sac (c.s.) is small and narrow but long in 
proportion to its width, and extends as far as the lateral nerve. Between it 
and the testes, the vas deferens forms a closely packed bundle of coils sur¬ 
rounded by numerous gland cells. Inside the sac, the vas deferens coils once 
or twice and then opens into the short straight cirrus. 
The vagina runs in a straight course laterally to open into a small 
spindle-shaped receptaculum seminis (r.s.). The ovary (ov.) is deeply divided 
into several blunt lobes closely packed together. It lies posterior and ventral 
to the receptaculum seminis and close to the excretory canal. Posterior and 
slightly aporal to it is the compact yolk-gland (y.g.) surrounded laterally by 
the testes. 
The uterus ( u .) is present as a narrow branched tube anterior to the ovary, 
but soon disappears, the mature eggs lying singly in capsules in the paren¬ 
chyma. 
Key to Species oe Cotugnia. 
1. Rostellum smaller than suckers 
Rostellum larger than suckers 
2. Testes 6-7, anterior to female glands 
Testes numerous, lateral or posterior to female glands 
3. Testes clearly divided into two lateral groups 
Testes in one broad posterior band ... 
4. Testes in one layer transversely 
Testes in several layers transversely ... 
5. Cirrus-sac extending beyond ventral longitudinal excretory vessel 
Cirrus-sac not reaching ventral longitudinal excretory vessel 
6. Yolk-gland lateral to ovary ... 
Yolk-gland posterior to ovary 
7. Testes 2-3 rows antero-posteriorly ... 
Testes 5 rows ant6ro-posteriorly 
8. Testes dorsal and lateral to longitudinal excretory vessels 
Testes ventral and lateral to longitudinal excretory vessels 
C. margareta Beddard 
( 2 ) 
C. browni Smith 
(3) 
(4) 
(5) 
C. collini Fuhr. 
C. polycantha Fuhr. 
C. fukrmanni Baez. 
( 6 ) 
C. crassa Fuhr. 
(7) 
C. fastigata n. sp. 
( 8 ) 
C. digonophora (Pasq.) 
C. brotogerys Meggitt 
( C . inaequalis Fuhrmann 1909 has not been described sufficiently to allow of its inclusion 
in this table.) 
HYMENOLEPIS COLUMBAE (Zeder, 1800). 
The specimens of this species had been collected from pigeons, Rangoon, 
and consisted of portions of strobila in various stages of development. No 
scoleces were found. According to Ransom (1909, p. 97) this species is identical 
with the H. sphenocephala (Rud.) described by Fuhrmann (1906, p. 449), whose 
description, with the exception of the points mentioned below, was fully 
corroborated by my preparations. 
