482 REPORT OF THE HARVARD AFRICAN EXPEDITION 
more than 2.2 mm. from the extremity. The ovejector is fairly long. It opens 
into a blind muscular sac which receives the vagina. The eggs, 43u long by 18u 
broad, are thin-shelled and become embryonated before being expelled into the 
host’s intestine. An examination made by Dr. Strong at the time of autopsy of 
the chyme from the intestine showed numerous larvae which had apparently 
hatched out of the eggs. 
Host. Felvs leo. 
Location. Free, in small intestine. 
Locality. Ruchuru Plains, Congo. 
Owing to the unfortunate fact that there is almost a complete lack of measure- 
ments accompanying descriptions of Cylicospirura subaequalis (= Sptroptera 
subaequalis) Molin, 1860, the type species of the genus in which our material 
must be accommodated, a specific determination is fraught with uncertainty. It 
is only because Vevers ! (1922) had access to some unpublished drawings made by 
Professor Leiper of Molin’s type material of Spirocerca subaequalis that we can 
accept Vevers’ statement that Spiroptera subaequalis is not congeneric with 
S. sanguinolenta as Seurat? (1913) thought it to be, since it is difficult to know 
how von Drasche (1883),? who redescribed and pictured Molin’s type material, 
could have overlooked the prominent bicusped termination of the buccal ‘‘teeth.”’ 
Vevers considers that his material from Felts tigris, for which he rightly created 
the new genus Cylicospirura, was identical with S. subaequalis Molin. The only 
difference that he noted between this material and that described by Seurat as 
S. subaequalis from Felis ocreata was in the matter of the latter possessing tri- 
cuspid teeth whereas the teeth in his material were bicuspid. Chandler ‘* (1925) 
described under the new specific name Spirocerca felineus from Felis domestica 
(India) a form undoubtedly belonging to the genus Cylicospirura which like 
Seurat’s ““S. subaequalis”’ possessed six trifid buccal ‘‘teeth.’”’? This point of re- 
semblance and the absence of any noteworthy differences in the descriptions 
indicate that the worms described by Seurat may be identical with S. felinews 
Chandler. 
We may consider, consequently, that two species of Cylicospirura are at 
present described in sufficient detail to permit of their being recognized. These 
are distinguishable on the basis of the bifid or trifid terminations of the buccal 
teeth and have the following host distribution: 
C, SUBAEQUALIS (Syn. Spiroptera subaequalis Molin, 1860) from Felis concolor, 
and F’. yaguarondi (Brazil); F. mellivora (Caraca); F. tigris (Malaya). 
1 Vevers, G. M.: (1922). Parasitic Nematoda collected from Mammalian hosts, etc. Proc. Zool. 
Soc. London (Dec. 1922), p. 909. 
2 Seurat, L. G.: Sur deux Spiroptéres du Chat ganté (Felis ocreata). CC. R. Soc. Biol. (1913), 
LXXIV, 676. 
3 von Drasche, R.: Revision der in der Nematoden = Sammlung des K. K. Zool. Hofcabinetes be- 
findlichen Original Exemplare Diesing’s und Molin’s. Verhandl. der K. K. Zool.-Bot. Gesellsch. Wien 
(1883), XX XIII, 194. 
4 Chandler, A. C.: The helminthic parasites of Cats in Calcutta. Ind. Jour. Med. Res. (1925) 
XIII, No. 2, pp. 213-228. : 
> The leopard, Felis pardus (Sierra Leone) may be added as a further host of Cylicospirura sub- 
aequalis, according to the label on a tube of material loaned for the purpose of comparison through the 
courtesy of Prof. Warrington Yorke of the School of Tropical Medicine, Liverpool. 
