OBSERVATIONS ON H@MMATOZOA IN CEYLON. 401 
soni, Castellani and Willey (not Cobbold) = F. tuberosa, 
v. Linstow. ‘T'wo adult females were found imbedded in the 
musculature of the body-wall, one in the ventro-lateral abdo- 
minal region, showing through the peritoneum, the other in 
the dorsal wall of the body cavity.} 
The blood-filariz of Sauropsida are the embryos of adult 
Nematoda, which are to be found in the peritoneum of the 
same host which harbours them. We have never found 
embryos in the blood without adults in the peritoneum ; the 
females are always ovoviviparous and the males appear to be 
rare. Both in the Indian crow and in the Brahminy lizard 
only females were found. | 
Filariz occurred also in the blood of a lizard, Calotes ver- 
sicolor, examined in August, 1904. These were about six 
times the length of a blood-corpuscle and offered no very 
striking characters. Two adults, a smaller male anda female 
about three times larger, were found in the mesentery below 
the aorta at the level of the testes. Both of them were 
characterised by the bright lemon-yellow colour of the intes- 
tine, and we accordingly proposed the name Filaria flaves- 
cens, subsequently forwarding the specimens to Dr. von 
Linstow, who was good enough to confirm the identification, 
adding further details, which will be duly published. 
In the blood of a Scops owl (Scops bakkamecena, var. 
malabarica) which died in Colombo in September, 1904, 
numerous filariz of an unusually large size occurred, measuring 
0:22 mm. in length, the anterior end rounded and sometimes, 
in the dried film, somewhat withdrawn from the cuticle, the 
tail acuminate. We name this Filaria scopsiana. Three 
adults were found in the peritoneum, the largest of which 
measured 13:25 mm. in length, the smallest less than half this 
size. The cesophagus was rather indistinct, but appeared to 
measure between ;!,th and ;4,th of the total length. 
‘In front of the caudal tuberosity which we described and figured there 
was an appearance of a vent, but Dr. v. Linstow says there is no anus. 
Instead he describes in front of the swelling a pair of papille. 
