50 Verm. 
VERMES. 
PiNTNER (2) : Cercaria clausii constantly swims about in colonies 
composed of 10-20 individuals united closely together by their tails. The 
intermediate host from which the Cercariso were discharged in large 
quantities was Trivia eitropcea. The colonies are probably swallowed by 
the next host (possibly a Medusa). A free in-wandering of each indi- 
vidual Distomum is out of the question. 
Railliet (3) : Parasites of domestic animals of Japan. 
Sonsino (6) : Parasites of Mugil cephalus , &c. 
Zschokke (4) : Parasites of Trutta salar. 
MESOZOA. 
^ Salinella salve, n. g. & sp. Under this name, Frenzel (1. 2) describes 
a remarkable animal, which in its outer form resembles some Turbellaria, 
e.g., Catenula. It is defined as an oblong, turbellarian-like animal, bluntly 
pointed anteriorly and posteriorly, flattened dorso-ventrally and bilateral. 
Normal length is 18-22 mm. The body-wall is od e-cell-layered. The 
ventral surface is finely ciliated, while the back and sides have short seta- 
like processes. The mouth is anterior, sub-terminal, ventral, and is pro- 
vided with strong hairs. Anus is terminal and surrounded by stiff 
processes. The inner ends of the cells, i.e., the ends towards the enteric 
cavity, have long cilia. Reproduction occurs by transverse division, and 
also by encystment succeeding conjugation. The larva is unicellular. 
Habitat — “ Salinensalz-Losung (2 °/ Q ) Cordoba (Argentinien).” 
Schulze describes the structure of Trichoplax adhcerens. The animal 
consists of a flat cellular mass, with differentiated dorsal and ventral 
surfaces, the epithelium of dorsal surface being flattened, while that of 
ventral surface is cylindrical, but there is neither radial nor bilateral 
symmetry. It is ciliated all over. The motion of the animal is amoeboid. 
Between dorsal and ventral epithelium is a loose meshwork of fusiform or 
stellate cells, many of them connected at one end with the dorsal epithe- 
lium, and at the other with the ventral epithelium by means of their 
» processes. A basement membrane under the outer epithelium is entirely 
absent. The mesenchym cells are present in greater numbers towards the 
ventral surface, while dorsally they are separated by large vacuolar spaces. 
Curious pigment masses and oil globules are present in the mesonchym. 
The method of feeding was not obsorved. No differentiated cellular 
organs are present, and no genital elements were observed. Reproduc- 
tion by. equal transverse division was observed. The fission takes place in 
the same way as it does with Amoeba , and does not entail any process of 
regeneration. The animals were kept for some years in the Aquaria of 
the Zoological Institutes of Graz and Vienna, which are supplied with 
sea- water from Trieste. It is therefore probable that they came 
originally from the Bay of Trieste. 
