75 
This is the parasite which has been reported as Tsenia solium of the 
dog by several authors, and b} 7 at least one State Board of Health. 
Unidentifiable Cysticerci (?). 
In the foregoing discussion certain parasites have been cited in the 
tables of synonym} 7 , although I consider them at present unidentifia- 
ble; still, other authors have claimed to have recognized them as iden- 
tical with the species in connection with which they have here been 
given, and not being able to disprove the synonymy, I have accepted 
the views of these authors. 
There still remain certain parasites which I have not been able to 
classify, namely: 
u Cysticercus aortse Notarjanni” is quoted by Tschudi, 1837, 53, as 
synonym of Cysticercus cellulosac / and 4 4 Cysticercus aorticus Notar, 
is mentioned by Moquin-Tandon, 1860, 369, but I have been unable to 
find the original description; Moquin-Tandon says that the body is 
oval and provided with filiform hooks. 
Cysticercus hepaticus Brera is mentioned by Tschudi, 1837, 53, as a 
synonym of Cysticercus cellulosde; and Moquin-Tandon, 1860, 369, 
mentions a Cysticercus hepaticus delle Ohiaje, with Trichosoma hepati- 
cus Brera as synonym. I have been unable to trace these names, unless 
reference is made to Finna hepatica Brera, 1809a, 159; 1810a, pi. 3, 
fig. i. 
HYDATID DISEASE— ECHINOCOCCOSIS. 
[Figs. 124 to 136.] 
Hydatid disease or echinococcosis is the infection of any organ with 
the cystic stage of a very small tapeworm which lives in canines. 
Genus ECHINOCOCCUS" Rudolphi, 1801. 
Generic diagnosis.- — Tseniinte (see p. 23): Strobila small (type species less than 7 
mm. long), and composed of few segments (type species not over 4 or 5), of which 
only the terminal (posterior) segment is gravid. Head armed with double row of 
hooks. Genital pores marginal, irregularly alternate. Cystic stage an echinococcus, 
with or without daughter cysts; several scolices develop in each of the numerous 
brood capsules. Adults in carnivorous animals, cystic stage in herbivorous and 
omnivorous mammals. 
Type species. — Echinococcus granulosus in sheep and calves. 
"Synonyms. — Hydatis Goeze, 1782a (doubtful whether this is used in a generic 
sense); Echinococcus Rudolphi, 1801; Acephalocystis Lsennec, 1804 and 1812; Liococcus 
Bremser, 1819a; Splanchnococcus Bremser, 1819a; Acephalocystus Lsennec of Herat, 
1821; Acephalocistis Cruveilhier, 1829a; ?? Acrostoma Lesauvage, 1829; ? Astoma Goodsir, 
1844d; ? Diskostoma Goodsir, 1844; ? Sphseridion Goodsir, 1844 (?); Eckinococcifer 
Weinland, 1858; Ecckin ococcus Lcebel, 1870a; 1 Discosloma Braun, 1894a; Echinokokkus 
of various German authors. 
