16 K C. BOVALLIUS. NEW ISOPODA. II. 
inner margin with three spines and at the lower corner provi- 
ded with a very strong, broad, knife-like spine, against which 
the dactylus impinges, thus forming a kind of scissors or 
pincers (Pl. II fig. 24). At the lower end the metacarpus 
shows a well developed apparatus for the articulation with 
the dactylus, exactly like that described from most of the 
Aeg&e. The dactylus is longer than half the metacarpus, not 
very strongly curved. The four last pairs of pereiopoda are 
unequal in length, the sixth being much the longest, the 
seventh the shortest. The femur is not dilated, linear, with 
some hairs at the lower, inner corner. The genu is long, 
feebly denticulated along the inner margin, provided with 
spines along the lower margin and with hairs along the outer. 
The tibia is a little more than half as long as the genu, 
provided with strong bristles along the inner and lower mar- 
gins and hairs along the outer. The carpus is longer than 
the tibia, armed in the same manner. The metacarpus is 
longer and narrower, feebly tapering downwards, where it 
shows the same apparatus for articulation as in the three first 
pairs, but not so strongly developed. The dactylus is strong, 
indistincetly pedunculated. (P1. II. fig. 25). 
The pleon consists of five fully free segments subequal 
in length and feebly decreasing in breadth backwards. The 
hinder lateral corners of the segments are sharp-pointed. All 
the segments are prettily signed on the dorsal side, a little 
different from and not so symmetrically as in Slabberina 
agata. 
The pleopoda are fringed with very long simple hairs, 
especially along the hinder margins. 
The urus is broader than long, semicircular, with two median 
and two lateral black spots on the dorsal side, the margins are 
erenulated, provided with short spines and fringed with long 
ciliated hairs. 
The uropoda (P1. II. fig. 26). The peduncle is shorter 
than the rami, at the outer margin fringed with ciliated hairs, 
the hinder, projecting corner carries a,long, strong, ciliated 
bristle. The inner ramus is longer and broader than the 
outer, obliquely truncated at the hinder end. The outer one 
is ovate. Both are fringed around the hinder margins with 
long, ciliated hairs. 
