109 
lst antenna seems to have 2 joints. Also 2nd antenna seems 
to be two-jointed, but is much bigger; on the lst joint a little 
bud-like process may be seen. The oral parts are not visible, 
not even tlie tip of the mandibles, which generally project a little. 
There are 5 pairs of incubatory plates; but what seems to be the 
third pair is the 4th, the third pair being concealed by the 4th. 
The 5th pair have in the hind part a crest, on the left plate with 
8, on the right plate with 6 teeth; such crests are also to be 
found in the other specimens of the genus Holophryxus from the 
„Tjalfe u (No. 83b and 84), but are not described in any other species. 
The left incubatory plate of 5th pair is, as shown in the tig., di- 
vided into two lappets, which seems to be caused by accidental 
molestation. 
The colour is (in alcohol) pale yellow. 
Neither the male nor ova were found. 
The host is unknown. A specimen of Eusirus Holmii (No. 
68) is the sole Crustacean brought home from this station, and 
though it was not probable that a Dajid should be a parasite on 
an Amphipod, I have closely examined this specimen, but it has 
no traces showing that it has been the host of the parasite. But 
from the journal it may be seen, that at the stat. mentioned were 
taken a Mysid (probably Boreomysis microps), Gennadcis elegans 
and Sergestes arcticus ; all these animals not being preserved I 
have not been able to find the host; for the rest see the next 
species, No. 83b! 
83b. Holophryxus sp.(H. Richard! Koehler?) (figs. 11 — 14 [13 partly]). 
(St. 346) 64° 22'N, 56° 00'AV, 400—800 m. wire, 10—5—1909. 1$ on 
Sergestes arcticus. 
From this stat. the „Tjalfe“ has brought home a Holophryxus, 
14 mm. long, 5,5 mm. broad. The form is the Same as in the other 
species of the genus, but somewhat more lengthened. 
Articulation of the antennæ is not visible; but the tip of 
the mandibles may be seen to project a little. Only 3 pairs 
