BIHANG TILL K. SV. VET-AKAD. HANDL. BAND 11. N:o 15. 51 
Diagn. Corpus elongatnm, lineare, quater longius quam latius. 
Caput magnum, fere circulare, segmento primo pereii duplo longius 
Oculi binis solum ocellis compositi. 
Antenne primi paris VI-articulate, dimidio latitudinis capitis 
breviores. 
Artenne secundi paris, flagello XX—XXX-articulato, marginem 
segmenti quarti pereii attingentes. 
Latera segmentorum pereii non incisa, setibus instructa. 
Dactyli pedum pereii unguibus ternis subequalibus armati. 
Pleon postice rotundatum, longius quam latius. 
Uropoda quartam partem longitudinis plei haud &quantes, ramis 
pedunculo longioribus. 
The body is elongate, linear, four times longer than broad. 
The head is: large, almost circular, twice as long as the 
first pereional segment. 
The eyes consist each of only two ocelli. 
The first pair of antenne are six-joimted, shorter than half 
the breadth of the head. 
The second pair of antenne reach to the anterior margin 
of the fourth pereional segment, the flagellum consist of 20 
to 30 articuli. 
The lateral margins of the pereional segments are not 
incised, provided with hairs. 
The dactyli of the pereiopoda are armed each with three 
subequal claws. 
The pleon is rounded behind, longer than broad. 
The uropoda are scarcely as along as a fourth of the 
length of the pleon. The rami are longer than the peduncles. 
Colour. Greenish white, almost hyaline. 
Length. 3—4 mm. 
Hab. The strait of Magellan. (S. M-.) 
2. TIais pubescens. DANA. 
Syn. 1852. Jera pubescens. DANA. United States Exploring Expedition. 
Crustacea. Vol. 2, p. 744, pl. 49. 
fig. 9Ja—9 d. Philadelphia. Fol. 
The body is elongate elliptical. The head is broader than 
long (3:2), the anterior margin truncated, with the middle a 
little projecting. It is a third longer than the first pereional 
segment. The eyes are small. The first pair of antenne are 
four-jointed; the second pair longer than half the body. The 
