A. E. Shipley 
277 
The number of annulations or rings is 40 or 41. As in some other 
species it is extraordinarily difficult to count their number. This is 
chiefly due to the fact that at both ends, but particularly at the anterior 
end, the lines demarcating the annulations are very faint and it is 
difficult to decide exactly where the first begins and where the last ends. 
Then the annulations do not appear to be true segments and no internal 
organs are serially homologous with them, so there is nothing by which 
to check the number. In P. kachugensis the annulations are confined 
to the ventral surface, they cease suddenly a little way up each side 
of the body and seen from the dorsal surface the animal is smooth and 
not ringed. (PI. XX, fig. 7.) 
The demarcating lines between the annulations are made more 
prominent by bearing a row of some 150—160 fine chitinous rods, 
somewhat sabre-shaped. These pierce the cuticle and externally end in 
sharp points projecting backward. (PI. XX, figs. 9 and 10.) This is 
the first time I have seen such spines in a Porocephalus. 
There is a slight median ventral groove which is shown well in 
PI. XX, fig. 6. 
The parasites were found encysted in the liver of a female Kachugci 
lineata, Gray, one of the Indian and Burmese representatives of the 
family Testudinidae. A piece of this organ, figured in PI. XX, fig. 5, 
shows that there can have been but little of the tissue of the liver left; 
but this drawing represents the edge of the liver, the only part sent to 
me. The deeper parts of the liver may not have been so heavily 
infected. 
(v) POROCEPHALUS CLAVATUS, Lohrmann. 
A few specimens of Pentastomids were sent to me in February 
1909 by Mr J. H. Ashworth of Edinburgh University taken in Northern 
Nigeria from the lung of the lizard, Varanus exanthematicus (= V. 
ocellatus). Three of these I take to be specimens of Lohrmann’s 
species Porocephalus clavatus which has also been recorded from the 
lungs of Varanus niloticus. 
(vi) POROCEPHALUS BLFURCATUS, Diesing. 
The remaining specimens, of which there were two, with a fragment 
of a third, belong to what I take to be Porocephalus bifurcatus, Diesing. 
The latter species is not very fully described so I add a few particulars. 
One specimen measured 21'5 mm. long and 1*5—2 mm. broad, the 
Parasitology m 18 
