2 o8 CRUSTACEA MALACOSTRACA. III. 



S. polaris, S. pusiola, S. turgida, S. spinus, S, Lilljeborgii, Pandalus borealis, P. Montagui and P. propin- 

 quus. It has been found on S. Gaimardii at Spitzbergen (G. O. Sars); north-east of Spitzbergen in Lat. 

 8oi5' N., Long. 33io' E. (Ohlin); in the Barents Sea (Max Weber); at the west coast of Novaya Zemlya 

 - here also on 5. turgida and in the straits to the Kara Sea (Stuxberg, Stappers); finally in the 

 Kara Sea (H. J. Hansen). Furthermore known from places in the North Sea and from Sussex in the 

 eastern part of the Channel (various authors), but not from its major western area. When Stephensen 

 quoted from Zirwas, that Carus had recorded it from the Mediterranean, I consider the determination 

 of the parasite as wrong; Carus said: "Adria: Trieste, in Virbio viridi et Hippolyta, rara (Walz)". 



Off the Baffin Island it was taken on S. polaris and S. turgida at two distant places, the most 

 northern in Lat. 7348' N. (Ohlin). Richardson (1905) enumerated a number of localities in the Atlantic 

 at the coast of the U. S. A. from about Lat. 41 '/3 N. northwards, and at Nova Scotia; the hosts 

 were six of the above-named European shrimps and, besides, Pandalus leptocerus. In the same work 

 the authoress has also a long list of localities from the North Pacific and both sides of the Bering 

 Sea, the most southern place being Point Arena, California, ab. Lat 39 N.; the hosts were Spirant. Gai- 

 mardii, S. polaris, S. Fabricii, S. groenlandica and besides seven species of Spirontocaris known only from 

 the Pacific; in 1909 Richardson enumerated a number of stations from the North-West Pacific, in the 

 Sea of Japan from ab. Lat. 36 N. northwards to near Lat 53 N. in the Bering Sea, but I entertain 

 some doubt as to the occurrence of this species of Phryxus at all these places, especially those in 

 the Sea of Japan and off California. And when the authoress quotes Bate ("Challenger" Macrura, p. 645646) 

 as having recorded this parasite from the Philippine Islands on Plesionika semilcems Bate she is quite 

 wrong, as Bate wrote that the parasite in question "closely approximates to Phryxus abdominalis Kr., 

 but differs in having . . .", which shows that he did not refer the parasite to the Kroyerian species. 



Family Dajidse. 



Three genera, with five species, are known from our area. 



DajUS Kroyer. 

 The material contained two species, one of which is new. 



148. Dajus mysidis Kroyer. 

 (PI. XV, figs. 14 a- 14 b). 



71846. Dajus Mysidis Kroyer, in Gaimard, Voy. in Scand., Crust. PI. 28, fig. i, A B. 



1874. Leptophryxus mysidis Buchholz, Zweite Deuts. Nordpolarfarht, Vol. II, Crust, p. 228; PI. II, fig. 2. 

 ! 1889. Dajus mysidis Giard & Bonnier, Bull. Sci. France et Belgique, Vol. XX, p. 255266, p. 272; Pis. 



VI-VII. 

 G. O. Sars, Account, II, p. 223; Pis. 9394. 



