10 C. BOVALLIUS. ASELLIDA. 
The head is broader than long, the lateral margins slightiy 
excavated. The eyes consist of some few, 4—5, ocelli on each 
side. The flagellum of the first pair of antenn&e consists of 
10—12 articles, with 4—5 olfactory tubes. The second pair 
of antenn&e are as long as the body. The metacarpus öf the 
first pair of pereiopoda ig dilated. The first pair of pleopoda 
consist of a short peduncle and a nearly quadrangular lamina 
in the male; in the female of a small circular lamina. The 
outer ramus of the uropoda is half as long as the inner. 
Colour. Dark fuscous, spotted with wbhite. 
Length. , 16 mam. 
Hab. In streams and ponds all through Europe. 
2. Asellus Forelii. H. BLANc. 
Syn. 1880. Asellus Forelii. H. BLANC. >Isopode aveugle de la 
région profonde du Lé- 
man>, etc. Bulletin de 
la Societé Vaudoise des 
Sciences naturelles. Sér. 
2:de. Vol. 16. p. 377, pl.13. 
ISSI. > > > M. WEBER. »Ueber einige neue 
Isopoden der Niederländ- 
isehen Fauna. «Tijd- 
schrift der Niederlan- 
dische dierkundige Ver- 
eening. Deell b, p. til: 
The head is almost as long as broad, the margins entire. 
Eyes wanting. The flagellum of the first pair of antenne 
consists of 4—5 articles, with 3 olfactory tubes (in the male 
as in the female). The second pair of antenne half as long 
as the body. The metacarpus of the first pair of pereiopoda 
not dilated. The first pair of pleopoda consist of an ovoid 
peduncele and an elongate ovate lamina in the male; in the 
female of an elongate ovate lamina only. The outer ramus 
of the uropoda is longer than half the inner. 
Colour. White, without spots. 
Length. 4—5 mm. 
Hab. "The lake Leman, from 35—150 fathoms. 
3. Asellus Sieboldii. DE ROoUGEMONT. 
Syn. 1849. FUHLROTT. (CASPARY), in 
Verhandl. der preuss. 
