254 K. SrePpHENSEN. 
cutting part having made its appearance, in addition to the molar part; 
mxp. 2 is curved, and is likewise almost of adult shape. 
The followmg 5 Spirontocaris species are of common occurrence 
in the material: Sp. Fabricii, Sp. Lilljeborgu, Sp. turgida, Sp. polaris 
and Sp. groenlandica; the remaining species are represented only by 
some few specimens. We have therefore some justification for suppo- 
sing that the larvae should be ascribed to these 5 species. Presuming 
larva Nr. 1 to be that of Sp. polaris, this species may be disregarded in 
seeking to determine the rest. 
If Larva Nr. 2 be the same species as described in the Danmark 
Exped. then it is out of the question that it should belong to Sp. Fa- 
bricii, as this species is only found in W. Greenland. On the other hand, 
its frequency leads us to suppose that it might belong to Sp. turgida, 
the species next in order of frequency in the material. 
Larva Nr. 3 should, from its high numerical position, probably be 
ascribed to Sp. Fabricii (vide p. 259). 
Larva Nr. 4 would then, supposing the foregoing to be correct, 
belong either to Sp. Lilljeborgii or Sp. groenlandica. I readily admit 
however, that my conclusions as to determination of these larvae rest 
on a very slight foundation. 
Spirontocaris larva Nr. 1. 
(1. free stage of Sp. polaris?) (Fig. 5). 
Bredefjord St. 35, ringtrawl, 400 m. w., 16/vi1 1912, 1 spec., 8mm. 
At this station the “Rink” obtained a Spirontocaris larva which 
in the spines on 4, and 5. abdominal segment closely resembles the larva 
Nr. 2 described below; the present specimen, however, belongs to an- 
other species. 
Young and old characters are here combined in a remarkable man- 
ner. The rostrum is quite short and thick, there is a supra-ocular spine, 
and one below the antennae, but not above the antennae. The peduncle 
of ant. 1 has three joints, with a spine on the under side of the first. 
The flagellum of ant. 2 is not articulated, a first segment is, however, 
indicated, and there is a suggestion of a second; the length of the fla- 
gellum cannot be given, as the point is lacking. The maxillipedes are 
of altogether larval type, and have large exopodites; pl—p5 however, 
are very close to the adult form, with distinct articulation, and, on 
pl—p2, large chelae; exopodites are altogether lacking; there are small 
gills, however, at the base. An even more adult character is the fact 
that 5. jomt of p2 bears a slight trace of being divided into other (2) 
jomts again. All 5 pairs of pleopoda are present, but appear to lack 
articulation. The telson is not separated from the 6th abdominal segment ; 
it is of the usual larval form, and appears to have been furnished with 
8(9?) pairs of bristles on its posterior edge (including the corner). Only por- 
tions of 7 pairs are remaining, but there would seem to have been two 
