Mr. E. J. Miers on Arctic Crustacea. 59 



Hippolyte Gaimardii, 



Hippolyte Gaimardii, Milne-Edw. Hist. Nat. Crust, ii. p. 378 (1837) ; 

 Kroyer, Nat. Tidsskr. 1 R. iii. p. 572 (1840-41) ; Monogr. Fremst. 

 Slsegt. Hippolyte's nordiske Arter, p. 74, pi. i. tigs. 21-29 (1842) ; 

 Goes, CEfv. Vet. Akad. Forhandl. p. 168 (1863). 



Hippolyte gibba, Kroyer, Nat. Tidsskr. 1 R. iii. p. 572 (1840-41) ; 

 Monogr. Slgegt. Hippolyte's nord. Arter, p. 80, pi. i. iig. 30, pi. ii. 

 tigs. 31-37 ( 1842). 



? Hippolyte Belcheri, Bell, Crust, in Belcher, ' Last of the Arctic Voy- 

 ages,' ii. p. 402, pi. xxxiv. tig. 1 (1855). 



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

 specimen. 



A single specimen (female with ova) was collected by Mr, Hart. 

 Length 2 inches 2 lines (55 millims.). The front margin of the cara- 

 pace is armed with two spines — one below the eyes, and one (very 

 small) at the junction of the anterior and inferior margins of the 

 carapace. The rostrum slightly exceeds in length the scale of the 

 antenna, is slightly directed upward at the distal extremity, 

 and is j-tootbed, the teeth on the upper margin becoming more 

 crowded toward the distal extremity. The third segment of the 

 postabdomen is without a compressed dorsal carina. The eyes are 

 obconical. The outer maxillipeds do not reach to the apex of the 

 antennal scale. 



The dorsal tubercle or carina is, according to Goes {I. c), gene- 

 rally characteristic of the males of this species, to which he refers 

 the H. gihba of Kroyer and H. Belcheri of Bell. 



Hippohjte Gaimardii is very generally distributed on the high- 

 northern coasts and islands of Europe. It has been recorded from 

 the shores of Norway, Finmark, Spitzbergen, Iceland, Greenland; 

 also Arctic America, if the H. Belcheri of Bell belong to this species. 

 Its author describes it as having but " a single tooth at the outside 

 of the orbilar notch." 



Hijppolyte spinus. 



Cancer spinas, Sowerby, Brit. Miscell. p. 47, pi. xxiii. (1806). 

 Alpheus spinus, Leach, Ed. Eucycl. vii. p. 431 (1813-14) ; Linn. 



Trans, xi. p. 347 (1815). 

 Hippolyte Soicerboii, Leach, Mai. Pod. Brit. pi. xxxix. (1815-17). 



Hippolyte tSowerbyi, M.-Edw. Hist. Nat. Crust, ii. p. 380 (1837). 

 Hipjwbjte spinus, Bell, Brit. Crust, p. 284 (1855). 



Coll, Foilden: Discovery Bay, 5 specimens, at 25 fathoms. 



This species is distinguishable at first sight by its compressed 

 lamellate rostrum, the high and stongly dentated median dorsal 

 carina, &c. As in Hippolyte turyida, there are four spines upon the 



