567 
Mar. is, 1925 Nematode Genera Syngamus and Cyathostoma 
posteriorly, terminated by a 2-lobed 
membranous bursa, each lobe of which 
is supported by five rays; spicules two, 
thin, each 650 n long. 
Female from 18 to 20 mm. long, 
diameter 850 p. Head 500 m in diam¬ 
eter, with buccal opening 350 m across. 
Body cylindrical, fish-hook shaped, 
with a short conical tail. Anal opening 
just before the posterior extremity; 
vulva prominent, situated at the 
anterior third of the body length. 
Oviparous. Eggs smooth, ovoid, 80 by 
55 fi, with an opercle at the smaller end. 
Host.—Casuarius galeatus. 
Location. —-Trachea. 
Geographic distribution. — Australia. 
(Original lot from host in the Zoological 
Garden, Paris.) 
The above is a free translation of the 
original description by Mfignin. No 
specimens are available for examina¬ 
tion. The original figure of the bursa 
does not at first glance seem plausible. 
In mounting a'specimen of C. ameri- 
can,um for examination the present writer 
happened to secure an almost iden¬ 
tical picture, I believe it may be safely 
assumed that M6gnin failed to figure 
the dorsal half of the bursa which was 
superimposed on the worm. The por¬ 
tion figured shows the ventral rays 
centrally located, the medio and 
postero-lateral rays together as the 
lateral fields in Mdgnin’s figure. The 
apices of the externo-lateral rays 
appear in the figure as the isolated oval 
spaces, one in each lobe. From the 
length of the spicules, and from the 
host, it is, I believe, wise to consider the 
species as valid. 
Cyathostoma variegatum (Creplin) 
Emend, (pi. 3, fig. 29 to 31). 
Strongylus trachealis Nathusius, 1837, Arch. 
Naturg. (Jahrg. 3) 1: 60. (nec. Syngamus 
trachealis Sieb. 1836.) 
Strongylus variegatus Creplin, 1849, Arch. 
Naturg. (Jahrg. 15) 1: 64. (.Strongylus 
trachealis Nath, renamed.) 
Syngamus variegatus (Creplin) Raill. 1898, 
Compt, Rend. Soc. Biol. [Paris] (X) 10: 401. 
Cyathostoma variegatum (Creplin) Chapin, 1925, 
present paper. 
Male 7.8 mm. to 9 mm.; female 
13.5 mm. to 45 mm. in length. Body 
slightly attenuated in either direction; 
posterior extremity of female ending 
in an acute tail, that of male truncate. 
Mouth opening circular, very broad, 
leading into a buccal capsule -with 
heavy chitinous walls. Buccal teeth 
six in number (?), corresponding in 
position with the circumoral papillae. 
Esophagus flask-shaped, with a long 
neck; in the male the esophagus is 
more slender. In the female the anus 
opens just before the tip of the tail; 
in the male it is within the bursa. 
Vulva prominent, transverse, cres¬ 
centic, situated at the interior third 
of the body length. Eggs 80j*by 40 m. 
Bursa of male strongyliform/ dorsal 
ray bifurcate. Spicules long, mutually 
similar, filiform. 
Host.—Ciconia nigra. 
Location .—In trachea. 
The above-mentioned data are taken 
from the original description of Na¬ 
thusius and are sufficient merely to 
show that the species is one of the 
four known forms in which the vulva 
lies at the anterior third. A knowl¬ 
edge of the exact length of the spicules 
would probably serve to determine the 
validity of one or more of the other 
species. 
At first glance "it might seem that a 
combination of Cyathostoma with tra¬ 
chealis Nathusius would be the" correct 
name for this species, since there is 
no conflict with trachealis Sieb. Na¬ 
thusius did not intend to name any 
species. He misidentified the material 
before him, and on the strength of his 
identification he transferred Siebold’s 
ecies from Syngamus to Strongylus. 
hile the International Code of 
Zoological Nomenclature is not ex¬ 
plicit on the point, it would appear 
that for the sake' of stability of no¬ 
menclature an unintentional creation 
of a name should be disregarded. 
A misidentification is not the proposal 
of a new name nor can it be regarded 
as tantamount to such. 
Cyathostoma tadornae Chatin (pi. 4; 
figs. 41, 47). 
Cyathostoma tadornae Chatin, 1874, Ann. Soi. 
Nat. Paris (VI) 1 (Art. 6): 1-6. 
Sclerostoma tadornse Linst., 1878, Compend. 
Helm, p. 152. 
Syngamus tadornae Raill., 1898, Compt. Rend. 
Soc. Biol. [Paris] (X) 5 : 402. 
Male. —Length 9.6 mm., form cy¬ 
lindrical, of uniform thickness through¬ 
out; color brick-red. Cuticle trans¬ 
versely striate at intervals of 20 n, 
longitudinal striae apparently absent. 
Buccal capsule corneous and cup¬ 
shaped, furnished at its base with two 
pharyngeal teeth. Esophagus thick, 
clavate, about one-fifteenth of the 
body length. Body is terminated by 
a bursa, well developed and regular, 
which is supported by ten rays, four 
of which are simple, the remaining 
six being bifurcate at their apices. 
From within the bursa there extend 
two brown spicules, 500 n long. 
Female. —Length 23 mm. Body of 
a brighter red than that of male. 
Head 0.9 mm. in diameter, similar to 
that of male. Buccal capsule as in 
male. Esophagus 1.8 mm. long, cla¬ 
vate. Vulva situated near the an¬ 
terior third of the body. Uteri well 
developed, packed with eggs measuring 
in their longest diameter 0.56 mm. 
(sic!). Body terminated by a conical 
