246 K. STEPHENSEN. 
the grown (Decapodernes Forvandl. 3, Archiv f. Math. og Naturvid., 
Christiania, vol. 14, 1890, p. 188, Pl. 6, fig. 29—31). 
Sars writes (1. c., p. 181—82) that he has never, despite very care- 
ful search in Nordland and Finmarken, where Sclerocrangon is extre- 
_mely common, succeeded in finding either larval or young stages, but 
only young specimens, altogether, or at any rate to a very high degree, 
resembling the fully grown, “all the characters of the developed animal 
being already well marked’. We may therefore doubtless agree with 
SARS in presuming that Sclerocrangon has no developemental stages at 
all, but appears from the first in the same form as when fully grown. 
In the case of young stages, of course, one should not attach too 
great systematic importance to such features as the shape of the cara- 
pace (here long and narrow) or peculiarities in the spinous armature; 
on the other hand, it is but natural that such characters should to a 
certain extent be taken into consideration. And in these respects, the 
present specimens agree entirely with the grown Nectocrangon, but 
not with Sclerocrangon. All things considered, therefore, I have but 
little doubt that the specimens in question are young stages of Necto- 
crangon lar, with regard to the developement of which, however, ab- 
solutely nothing is known. 
Length 11—12 mm. 
The integument is comparatively soft, without sculpture; there 
are, however, two spines in the medio-dorsal line behind the rostrum, 
exactly as in grown Nectocrangon lar. There is also a spine beneath 
the eye, and at the anterior corner of the carapace. The shape of the telson 
is very characteristic, having almost parallel sides, with two spines on 
each, close to the end. At each of the posterior corners are two spines, 
of which the median is the longer. In most of the specimens, the poste- 
rior edge of the telson projects slightly in the centre, but is cut off 
sharply and armed with two spines; in some cases, (St. 61, 65, 66) two 
fine bristles are found on either side between this portion and the spmes 
on the posterior corners. The telson thus differs from that of the grown 
Nectocrangon, which is almost the same shape as in the grown Sclero- 
crangon. I have nothing to remark concerning the appendages, but 
refer for these to my figures. The point of the flagellum in ant. 2 is 
lacking in all specimens. P2 is, as already mentioned, almost as 
long as pl. 
True, the grown Nectocrangon has only been taken at one of the 
stations (St. 104) where the present young stage was found, while Scle- 
rocrangon boreas was taken at St. 66, 89 and 104; the last-named spe- 
cles 1s, moreover, altogether of more frequent occurrence in the material 
than Nectocrangon; I have, however, for the reasons given above, no 
great doubt as to the correctness of my determination. 
Nectocrangon lar is found in shallow water all round the coasts 
of Greenland. In addition to the area of distribution noted in the Con- 
