BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 11. N:o 15. 23 
The body is sligthly convex, elongate. 
The head is somewhat depresseed, not rostrate. 
The eyes are large, distinctly faceted. 
The first pair of antenne are shorter than the breadth 
of the head; the flagellum multi-articulate. i 
The second pair of antenne are as long as the body; the 
flagellum multi-articulate. 
The mandibles with three-jointed palp. 
The lateral margins of the pereronal segments are pro- 
duced, incised, but not laciniated; they cover the bases of 
the legs. 
The first pair of pereiopoda are cheliform, with simple 
dactyli. The following are subequal, walking legs; the dactyli 
are pedunculated, bi-unguiculate. 
The uropoda are styliform, the rami narrowly laminar. 
1. Iamna longicornis. LucAS. 
Syn. 1845. Jera longicornis LUCAS. Exploration scienti- 
fique de V'Algerie. Les 
animaux articulés. p. 
66, pl. 6, fig. 4—4:e !). 
1866. D > > HELLER. >»Carcinologische Bei- 
träge zur Fauna des 
Adriatischen Meeres»>. 
Verhandl. der K. K. 
zoologisch-botanischen 
Å Gesellsch. in Wien. Bd. 
16, p. 733. 
The head is broader than long, the lateral anterior cor- 
ners projecting into sharp, flattened processes. The flagellum 
of the first pair of antenn&e is five-jointed. The first and 
second joint of the second pair of antenn&e are provided with 
a strong, obtuse process, beset with hairs. The metacarpus of 
the first pair of pereiopoda is dilated, produced into a sharp 
tooth, the anterior margin carries two smaller, tooth-like pro- 
minences. The dactylus is curved, without hairs. The first 
three pereional segments are feebly, the fourth deeply, incised 
at the lateral margins. The pleon is as long as the last three 
!) On the plate the animal is signed »>Jera Deshayesiir. 
