Igt6. | T. SOUTHWELL: Indian Cestoda. 17 
Cysticercus fasciolaris, Rudolphi, 1808. 
(Larval form of Taenia crassicollis, Rudolphi, 1810). 
ZEV #8277:8 Liver of Mus Amritsar, Capt. G. I. Davis, I.M.S. 
vattus. Punjab. 
Large numbers of larval forms of C. fasczolaris were removed 
from their cysts. The error arose in consequence of the above 
two forms being mixed in the same bottle. 
Thysanosoma sp., Diesing, 1835. 
The specimens referred to T. actinintdes on page 286 were 
two in number. One specimen consisted of a scolex and about 
I2 segments only; the other was a mature worm. ‘The measure- 
ments of the latter were as follows :— 
Entire length of worm... ae oe ... go mm. 
Greatest breadth a e Sst Mim: 
Length of longest segment ee es ora are 0 
Breadth of head a st bad i) LOM. 
Scolex unarmed. Rostellumabsent. There was noneck. The 
suckers are four in number and sym netrical. They face slightly 
forward. Proglottides numerous and always much broader than 
long throughout the entire length of the worm. The posterior 
flap of each segment markedly overhangs the succeeding seg- 
ment both dorsally and ventrally. As I had only one complete 
specimen, sections were not prepared but I concluded from an 
examination of the external character that the specimen was Thy- 
sanosoma actintoides. 
A more careful examination which I have just made has, 
however, conclusively proved that the specimen, although prob- 
ably belonging to the genus Thysanosoma, does not agree with 
any known species of that genus. 
The followinz details have been definitely established :— 
Tie head is unarmed. There are four symmetrical suckers 
directed slightly forward. There is no unsegmented portion suc- 
ceeding the head, but the neck portion is flattened dorso-ven- 
trally. The posterior edze of each segment very markedly over- 
laps the succeeding segment both dorsally aid ventrally, but the 
free edge of this flap is puckered or frilled and of broken up 
into fimbriae. The gonads appear in the 11th segment, on one 
side only, and the genital pores are absolutely unilateral. Details 
with reference to the reproductive organs could not be made out 
satisfactorily as the material was badly preserved, but sections of 
the terminal segment led me to the definite conclusion that many 
para-uterine organs were present surrounding small clusters of 
embryos. 
It is clear that these characters distinguish this worm both 
from T. actintoidzs and from T. giardit. The only other known 
species of this genus is T. gambianum, Beddard (Contributions to 
the anatomy and systematic arrangement of the Ces/ordea, by 
