14 C. BOVALLIUS. NEW ISOPODA. II. 
types must be different animals. Of this reason it seems fit 
to keep up the generic name proposed by VAN BENEDEN, allo- 
wing that in other respects the both genera are closely allied. 
G. O. SaArs described in 18667!) a new species of Slabbe- 
rina from the coast of Norway, S. agilis, which differs from 
the orginal species S. agata, VAN BENEDEN, in some points, as 
the proportion of the pereion and the hinder part of the body. 
the length of the second pair of antenne&e, the distribution of 
the colour, a. o. I 1874 J. RizEma Bos ?) gives a detailed 
description of S. agata under the name of Eurydice pulchra, 
LEACH; he corrects some of the errors in the description of 
VAN BENEDEN, but places Slabberina synonymous to Eurydice, 
although he mentions the contradictions in the diagnoses 
of VAN BENEDEN and LEACH. My specimen comes very near 
S. agilis in many respects and I should not hesitate to unite 
them, if not the statement of SaArs that the four posterior 
pairs of pereiopoda are increasing in length would be oppo- 
site to the fact that the seventh pair of pereipoda in my 
specimen are much shorter than the sixth pair, which are 
longer than the preceding pairs. From the other species, 
S. agata, the new one is to be distinguished by the same 
characteristics, and by the length of the second pair of an- 
tenne, the number of articles of the flagellum, the unequal 
length of the pereional segments the distribution of the colour, 
and the armature of the metacarpi of the three first pairs of 
periopoda. Slabberina is a true member of the family Ciro- 
lanide. 
The head is comparatively large, the anterior margin is 
semicircular, not truncated. Between the eyes are two pairs 
of spots of black pigment in radiating lines. The space between 
the eyes is a fourth of the breadth of the head. 
The eyes are large, very black, distincetly faceted, the 
ocelli placed in six rows, ten ocelli in the median row. 
The first pair of antenne (P1. II. fig. 22) are longer than 
the head. The peduncle consists of three joints, the first very 
!) >Beretning om en i Sommeren 1865 foretagen zoologisk Reise ved 
Kysterne af Cristianias og Christiansands Stifter», i Nyt Magaiin for 
Naturvidenskaberne. Bd. 15, p. 117. Ckristiania, 1866. 
?) Bijdrage tot de kennis van de Crustacea Hedriopthalmata van Neder- 
Sr en zijne Kusten. Akademisch Proefschrift, etc.” Groeningen. 
1874; 8:0. 
