186 Rev. T. R. R. Stebbing on new 
from a figure given in a memoir in the possession of Professor 
Milne-Edwards.”” That the first species of Seba should be 
taken on the coast of Naples, while the second comes from 
South Africa, suggests the reflection that there must be whole 
armies of sessile-eyed crustaceans yet to be discovered. 
The generic characters given for Seba are as follows :— 
“Slender, smooth; antenne long, subequal; cox small, 
four anterior deeper than the three posterior; gnathopoda 
uniform, subequal, chelate.” The new species agrees with 
Seba innominata in all these respects, except that the an- 
tenn (at least in my specimen, which may be a very young 
one) are not very long, and that the gnathopods, though 
agreeing in general character, are not precisely uniform. 
The first are shorter than the second; they have the thighs 
more slender, the hands broader, and the intermediate joints 
notably of less length. In both the infero-anterior angle of 
the hand is produced, so as to be equal in length to the finger. 
The first enathopod is given in the figure as it and its fellow 
appeared in the specimen; but the reversed position of the 
wrist, hand, and finger, pointing forwards instead of back- 
wards, is not likely to be the natural position in the living 
animal. 
The last three pairs of pereiopoda differ from those of Seba 
innominata in having the thighs broad, in the last pair with 
a serrated edge, and in having the metacarpal joints strongly 
developed and overlapping the wrists. The telson is small; 
the caudal appendages short, the rami of the second pair ex- 
tending a little beyond those of the-first and third. The name 
proposed is Seba Saundersii, out of respect for W. Wilson 
Saunders, Esq., F.R.S., for whom the marine treasures were 
collected among which this little stranger, about an eighth of 
an inch long, reached our shores. 
ILI. Out of the same sifting of sand and fragments which 
yielded the Seba came a tiny Isopod, only a twelfth of an inch 
in length, with a very striking resemblance, at first sight, to 
the figure of Cymodocea armata in Milne-Edwards’s ‘ Histoire 
Naturelle des Crustacés’ (pl. xxxi. fig. 16). The resemblance, 
however, is only one of general outline ; for whereas the striking 
feature in the Cymodocea is the triangular prolongation of the 
seventh segment of the thorax, in the new species it is the 
terminal segment of the abdomen or tail which is produced 
beyond the caudal appendages into a large conical tooth. 
The body is smooth, with scale-like markings visible under 
a lens over all parts of the skin. The abdomen is in two 
divisions, the first retaining indications of three segments sol- 
