BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND ll. N:o 15. 47 
1840. Jera nivalis. KROEYER. H. MILNE-EDWAERDS. Histoire na- 
turelle des Crustacés. 
Tome 3:me, p. 149. Paris. 
The first pair of antenn&e are five-jointed, shorter than a 
third of the breadth of the head. The second pair of an- 
tenne reach to the anterior margin of the fifth pereional seg- 
ment. The pleon is as long as the last three pereional seg- 
ments, with a deep semicircular notch at the hinder margin 
for the reception of the uropoda, which are fixed close to- 
gether. The minute rami are shorter than the peduncles, 
equal in length. 
Hab. West coast of Greenland. (IKROEYER.) 
Probably this species after a closer examination of fresh 
specimens will shows to be identical with Z. albifrons, the 
differences being wery few and not of great importance. 
4 Iera Kroeyerii. H. MILNE-EDWARDS. 
Syn. 1840. Jera Kroeyerii. H. MILNE- 
EDWARDS. Histoire naturelle des 
Crustacés. Tome 3:me, 
pi 149; "Paris: 
IS4h > > ? Le Régne animal par Cu- 
vier. Ed. (4:me) acc. des 
planches. Les Crusta- 
é GES FEL (0, Hp. 
Paris. 
1866. » » TAS C. HELLER. >»Carcinologische 
Beiträge zur Fauna des 
Adriat. Meeres>. Ver- 
handlungen der K. K. 
z00logish-botanischen Ge- 
sellschaft in Wien. Bd. 
Hö Pp 32. 
The head is broader than long, the anterior margin tri- 
lobated. The first pair of antenne five-jointed, stout, almost 
as long as the breadth of the head. The second pair are 
long, they reach to the anterior margin of the sixth pereional 
segment. The pleon is longer than the last four pereional 
segments together, with a median, scutiform projection at the 
