48 



(one very large example out of several hundred observed 

 measured 105 by 55 micromillimeters). The ova here de- 

 scribed were taken from the uterine tube of a damaged 

 female, the genital tubes and intestine being protruded 

 through the broken body wall and hanging freely exposed in 

 the 4 per cent, solution of formaldehyde used as a preservative 

 for twelve days before the study was made. Nevertheless, 

 in many of the ova active vermicular movements persisted 

 in the enclosed larval worms. 



From comparison of the above data with the descriptions 

 quoted in the early part of the article it is clear that the 

 present specimens are to be classified as an intermediate 

 variety between Ascaris leptoptera and Linstow's Ascaris 

 leonis. Whether, in view of the marked variations which 

 seem possible in these leonine ascarides, it is justifiable on 

 purely morphological grounds to accept their specific separa- 

 tion is of course an open question; and to the writer it seems 

 doubtful whether the matter can be determined short of 

 careful feeding experiments. It is true the specimens here 

 described seem more nearly related with Linstow's Ascaris 

 leonis than with Ascaris leptoptera, Rud., as described by 

 Schneider; but in view of the existing uncertainty it has 

 seemed best to adhere tentatively to the older specific name 

 and relate our specimens as a variation thereof. 



Ascaris aquillce, n. s. (Plate V). 



There were obtained from the proventricle of an American 

 bald eagle, Halioetus leucocephalus (P. Z. G. Lab., 959), two 

 nematode worms (Path. Hist., 1637; No. 32, Synopsis, this 

 journal) at autopsy. Both were females and one was badly 

 damaged, the head lost and the esophagus protruding from 

 the broken end. It is stated that in addition to these speci- 

 mens from the proventricle, larval filarial worms had in life 

 been found in the blood of this worm, but at autopsy no adult 

 filaria? were encountered. 



