112 
The 3 specimens giving thus together a very distinct series 
of development, I think there is no doubt that they all belong to 
the same species. 
The relation to the host is not mentioned for any Dajid; the 
authors only mention the place, where the parasite is fixed. The 
specimen from the »Tjalfe" St. 346 was, as shown in figs. 13—14, 
fixed on the hind part of the dorsal surface of the carapace of the Ser- 
gestes with the cephalon turned towards the abdomen of the host, 
just as H. Richardson has figured Holophryxus Giardi and H. 
californiensis. The carapace of the Sergestes has dark holes from 
the mouth and pereiopoda of the parasite (see fig. 14); also it 
may be seen, that the Holophryxus has 
removed its legs 2 or 3 times (together 
with its growth ?). 
As the parasite is fixed quite super- 
ficially to the host, some very interesting 
questions arise. Does the parasite only 
Fig. 14. live as long as the time between two cast- 
Kes mee MR ADKOS ings of the skin of the host? Does it 
of Sergestes arcticus with 2 ' 
the marks of the mouth Prevent the host from casting the skin ig 
and pereiopoda of To answer these questions is quite 1m- 
Holophrytus (Richardi?). possible at the present moment. 
84, Holophryxus Åcanthephyræ n. sp. (fig. 13 [partly], 15—21). 
(St. 322) 609 07'N, 489 26" W, 2000 m. wire, 3—5—1909, 1 spec. (9) om 
Acanthephyra purpurea. 
As I have had but one single specimen, a closer examination 
and dissection was not possible; therefore the following description 
can not give all details. 
Length 22 mm., breadth 12,5 mm. i 
The specimen is very like H. californiensis from Califorma 
(H. Richardson, Proc. U. S. Nat. Mus. vol. 33, 1908, p. 692—94, 
figs. 4—5). From Miss Richardson's very short description and 
her indistinet photographkie fig. it cannot with security be datere … 
