1 10 ANIMAL PARASITES. 



Hope, I have received a considerable number of segments of this 

 worm, unfortunately destitute of neck and head. It was expelled 

 by pomegranate-bark, and appears, like Tcenia mediae unellat a, to 

 be difficult of expulsion. 



What we know of it at present is as follows : Its total 

 length must be at least 6 — 10 yards. Its segments are very 

 thick, white, and fat; in the mature state more than 1 inch in 

 length, 3 — 5"' in breadth, and extremely massive. They are dis- 

 tinguished by having a longitudinal ridge running along the whole 

 of the mature and immature segments. The genital pores are 

 irregularly alternate ; the penis so much concealed behind the 

 thick, inflated margins of the genital pore that it is hardly dis- 

 coverable. The uterus is formed by a thick median stem, into 

 which 40 — 60 lateral branches open; these resemble those of 

 T. mediocanellata, or perhaps still more those of Tcenia ex Cystic. 

 tenuicolU, especially when we consider the arrangement of the 

 branches like the teeth of a rake at the upper and lower margins 

 of the segments. The ova are oval, rather roundish, uneven, 

 and 0-013 - 0015'"= 0-030 - 0034 millim. in breadth by 0017 

 - 0'019'"=0-038 -0-040 millim. in length. They allow the six- 

 hooked embryo, which is 0-010'" = 0-021* millim. in diameter, to 

 shine through them distinctly. I never saw such remarkably 

 developed embryonal hooklets in any other human Tcpnice ; the 

 central ones resemble stilettoes. The inner hooklets were 0-0031 

 -0-0038'"=0-0069 - 0-0071 millim.; the outer ones 0-0021'"= 

 00046 millim. in length. The calcareous corpuscles were as 

 large and numerous as in T. mediocanellata. This Tcenia is par- 

 ticularly rich in cholesterine, for very large and numerous flakes 

 of the substance made their appearance in the deposit which I 

 obtained from the sediment at the bottom of the bottle in which 

 this tape-worm came from the Cape. 



The migrations of the six-hooked embryos and of the scolices 

 are unknown to me. Rose writes that it is impossible that the 

 latter should live in the flesh of pigs, as the worm was obtained 

 from a Hottentot, and the Hottentots, like the Jew and Moham- 

 medan, eat no pork ; a thick Tcenia occurs in Abyssinia, amongst 

 the Mohammedan inhabitants. It is known at the Cape of Good 

 Hope that the Hottentots brought this tape-worm with them 

 from the Caffer wars, in which they enjoyed themselves amongst 

 the cattle of the Caffers. The scolex, therefore, appears to live in 

 the cattle, and perhaps, also, in the sheep of the Caffers, and it 



