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



Atylus carinatuSj. 



Gammarus carinatus, Fabr. Ent. Syst. ii. p. 515 (1793), 



Atylus carinatus, Leach, Zool. Miscell. lii. p. 22, pi. Ixix. (1815) ; 



M.-Edw. Hist. Nat. Crust, iii. p. 68 (1840); Spence Bate, Cat. 



Amphip. Crust. Brit. Mus. p. 134, pi. xxv. figs. 1-3 (1862) ; Buch- 



holz, Crust, in Koldewey, Zweite deutsche Nordpolarf. p. 357, pi. x. 



(1874) ; Boeck, Skandinaviske og Arktiske Amphipoder, ii. p. 324 



(1876). 

 Amphitho'e carinata, Kroyer, Kongl. Dansk. Vidensk. Selsk. Afh. vii. 



p. 256, pi. ii. fig. 6 (1838); Voy. en Scand. Atlas, Crust, pi. xi. 



fig. 1 ; M.-Edw. Hist. Nat. Crust, iii. p. 41 (1800). 



Coll. Feilden: Discovery Bay, at depths of 5| and 25 fathoms. 



In the adult males of this species, at least in such specimens as I 

 have observed, the body is slender, the palm of the first pair of legs 

 more elongate and narrowed distally, and the lobes of the terminal 

 segment narrower and separated by a wider and deeper fissure. 

 The length of the specimen (a male) obtained at 25 fathoms depth 

 (the only one which, being preserved in spirits, could be accurately 

 measured) is 1 inch 1 line (nearly 28 millims.). 



Atylus carinatus occurs on the coasts of Greenland and Spitzber- 

 gen and in Davis Straits. 



Acfintkozone hystrix. 



Acanthosoma hystrix, Owen & Ross, Append. Ross's 2nd Voy. Zool. 



Crust, p. xci, pi. B. fig. 4 (1835) ; Bell, in Belcher's ' Last of the 



Arctic Voyages,' Crust, p. 406 (1855). 

 Amphithoe hystrix, Kroyer, Kongl. Danske Vidensk. Selsk. Afh. vii. 



pi. ii. figs. 6 & 7 (1838); M.-Edw. Hist. Nat. Crust, iii. p. 40 



(1840). 

 Paramphitho'e hystrix, Bruzelius, Kongl. Vet. Akad. Handl. iii. p. 71 



(1859) ; Spence Bate, Cat. Amphip. Crust. Brit. Mus. p. 147, pi. 



xxviii. fig. 1 (1862). 

 Acatithozone cuspidata, Boeck, Forhandl. Vidensk. Selsk. p. 184 (1870); 



Skandin. og Arktiske Amphip. p. 229 (1876), nee Lepechin. 

 Acanthozone hystrix, Miers, Ann. & Mag. Nat. Hist. (ser. 4) xix. 



p. 137 (1877). 



Coll. Feilden : Discovery Bay, one specimen ; Franklin-Pierce 

 Bay, two specimens. 



Coll. Hart : Franklin-Pierce Bay, 13-15 fathoms, three speci- 

 mens. 



Two of the specimens collected are adult males, another is an 

 adult female. The length of the largest specimen from Franklin- 

 Pierce Bay slightly exceeds 1 inch 2 lines (30 millims.). 



In the elaborate plate that illustrates this species in the ' Zweite 

 deutsche Nordpolarf.' (/. c.) the rostral spine is represented as conical, 

 straight, and acute, and the basos joint of the sixth and seventh 

 pairs of legs as anned with four strong spines upon its posterior 

 margin. In all the specimens of both sexes that I have examined 

 the rostral spine is laterally compressed and bent near its base, pro- 

 jecting horizontally forwards, and there are but two spines upon 



