554 
TRANSLATIONS FROM CONTINENTAL JOURNALS. 
worm of the vessels and the heart of the dog may be, it cannot 
be the Dachmus trigonocephalus of Dujardin; it remains, 
therefore, to determine with which species it is to be classed. 
At the time of Rudolphi the worm which has occupied our 
attention would evidently have been classed with the Stron¬ 
gylus of Muller; for the male possesses in a high degree the 
caudal pouch supported by two costae or ribs which is 
considered by this celebrated naturalist as the essential cha¬ 
racteristic of this genus. But for a number of years the 
genus Strongylus has become dismembered. Dujardin first, 
and afterwards Diesing, have formed out of it the Scleros- 
toina, Stenurus, Pseudalius, Dachmius, Eustrongylus, and the 
Strongylus, unprovided with buccal armour, and oesophageal 
capsule ; the worm in question cannot belong to either the 
Dachmius, Sclerostoma, or the Stenurus. The tail not being 
bifid, its spiculae, which are not elongated, and the vulva, 
which is not prominent, considerably separates it from the 
genus Pseudalius. Finally, it cannot be ranged with the 
genus Eustrongylus; for MM. Blanchard and Diesing have 
shown that in the Eustrongylus gigas , which is taken as the 
type of this genus, the caudal pouch in the male is not pro¬ 
vided with costae, and there is but one spicula; in the female 
there is but one ovary, and the vulva is situated at a short 
distance from the mouth. But bv its thread-like body, atte¬ 
nuated at each end ; by its small naked mouth ; by its caudal 
pouch, obliquely truncated, and provided by transparent 
costae or ribs ; as likewise by its two slender spiculae, this 
nematoid evidently belongs to the genus Strongylus, of 
which it constitutes a remarkable species. We must, how¬ 
ever, add finally, that by the disposition of the organs of 
generation, it has some affinity with the Sclerostoma hyposto - 
mum, Dujardin, and the Sclerostoma tetracanthum , Diesing, 
and also with the Sclerostoma dentatum , Diesing. All these 
have two elongated ovaries terminating in the uterus, from 
which emanates a common oviduct opening in the vulva; 
which latter is situated a short distance from the tail. They 
likewise have two long, slender spiculae, and a caudal pouch 
with multiple rays and a single testicle, which is more or less 
retracted within the bodv. 
%/ 
The salivary apparatus might not be considered so rare in 
the nematoids as has been hitherto believed. We have 
ascertained its existence in all the Sclerotomians of the domes¬ 
tic mammiferous animals which have come under our notice, 
that is to say, the Sclerostoma equinum , Duj., the S. tetracan - 
thum. Dies., the S. hypostomum , Duj.; the S. dentatum, Dies., 
and in the T)ac/mins triqonocephalvs, Dui. Moreover, it has 
