Mr. E. J. Miers on Arctic Crustacea. 63 



Coll. Feilden : Dumb-Bell Harbour, lat. 82^ 30', one female speci- 

 men. 



Coll. Hart : Franklin-Pierce Bay, 13-15 fathoms, one male 

 specimen. 



In this species the rostrum is short and slender, there is a strongly 

 4-dentate median dorsal carina, three strong spines on the anterior 

 margin of the carapace, and the segments of the postabdomen are 

 strongly spined upon their inferior lateral margins. The largest 

 specimen collected has the rostrum, anterior to the front margin 

 of the carapace, |^-toothed; the length of this specimen is 2 inches 

 10 lines (72 millims.). In the male, length 2 inches 4 lines (59 

 mUlims.), the segments of the postabdomen (especially the second 

 segment) are narrower on the sides, and the lateral spines much 

 longer. 



H. groenlandica occurs on the coasts of Greenland, Arctic Ame- 

 rica (Port Bowen, Melville Island), and in the seas of Kamtschatka 

 and Okhotsk. 



STOMATOPODA. 



Mysiu^. 



My sis oculata. 



Cancer octdatus, 0. Fabr. Faima Groenlandica, p. 245. no. 222 (1780). 



Mysis Fahricii, Leach, Trans. Linn. Soc. xi. p. 350 (1815). 



Mysis oculata, Kroyer, Nat. Tidsski-. ii. p. 255 (1838-9) ; 3 R. i. pp. 13, 

 41 (1861) ; Voy. en Scand. Crust. Atlas, pi. viii. fig. 2 ; Buchbolz, 

 Crust, in Koldewey, Zweite deutscbe Nordpolarf. p. 284 (1874). 



Coll. Feilden : Cape Napoleon, 25 fathoms (temperature of water 

 29°-2). 



The single specimen collected is in a very much mutilated condi- 

 tion. Its length is nearly 10 lines (20 millims. ). 



It occurs on the coasts of Greenland and Spitzbergen. 



ISOPODA. 



Arcturus bciffini. 



Idotea baffini, Sabine, Append. Capt. Parry's 1st Voy. p. 50, pi. i. fig. 



4-6 (1821) ; Ross, Append. Capt. Parry's 3rd Voy. p. 117 (1826) ; 



4th Voy. p. 203 (1828). 

 Arcttirus tnberculatus, Latr. in Cuvier's Regne Animal (ed. 2), iv. 



p. 139 (1829). 

 Arcturus haffini, Westwood, Trans. Entom. Soc. Lond. i. p. 72 (1830) ; 



M.-Edw. Hist. Nat. Crust, iii. p. 123, pi. x.xxi. fig. i. (1840); Bell, 



in Belcher, ' Last of the Arctic Voyages,' ii. p. 408 (1856). 



Coll. Feilden : Cape Napoleon, at 25 fathoms, two specimens, 

 male and female. 



Coll. Hart : Dobbin Bay, 30 fathoms, one male and one female ; 

 Franklin-Pierce Bay, 13-15 fathoms, four males and one female ; 

 same locality, depth not stated, two females and many young. 



