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



the spines at the antero-lateral margins of the carapace, and the teeth 

 of the median dorsal carina less prominent and acute ; the outer 

 lamina of the antennae is of a more broadly oval shape; the inner 

 ramus of the fii'st to fifth pairs of the postabdominal appendages, 

 which in the male is quite small, in the female is, with the outer 

 ramus, flattened and largely developed, and furnished with long 

 marginal cilia, to which the ova adhere by the viscous matter which 

 retains the whole mass in situ. The length of the largest female 

 slightly exceeds 4 inches (103milhms.) ; that of the largest male is 

 only 2| inches (68 millims.). The dark purple longitudinal stripes 

 on the segments of the postabdomen are generally much more dis- 

 tinct in the males than in the females. 



This species is found in great abundance throughout the high 

 northern and Arctic latitudes — occurring iipon the Scandinavian 

 coasts, Greenland, Iceland, Spitzbergen, the north coast of North 

 America (Port Bowen, Igloolik, Felix Harbour, Melville Island), 

 and Kamtschatka. Cahfornia, I may add, is mentioned as a habi- 

 tat of this species by Owen and Eoss in the Appendix to Ross's 

 Second Voyage, on the authority of specimens collected during the 

 voyage of the ' Blossom.' 



Sabinea sejptemcarhiata. 



Crangon septemcarinatus, Sabine, Append, no. x. of Capt. Parry's 1st 

 Voy. p. 58, pi. ii. figs. 11-13 (1821); Ross, Append. Capt. Parry's 

 4th Voy. p. 205 (1828); MUne-Edw. Hist. ^at. Crust, ii. p. 343 

 (1837) ; Brandt, Crust, in Middendorflp, Sibirische Reise, p. 114 

 (1851;. 



Sabinea septemcarhiata, Owen and Ross, Crust, in Append. Ross's 2nd 

 Vov. p. Ixxxii (1835) ; Miers, Ann. & Mag. Nat. Hist. (ser. 4) six. 

 p. 133(1877). 



Sabiiiea (^Crangon) septemcarinata, Kroyer, Nat. Tidsskr. iv. p. 244, 

 pi. iv. figs. 34^40, pi. v. tigs. 41-44 (1842-43). 



CoU. Feilden : Discovery Bay, 25 fathoms, abundantly, both males 

 and females ; Cape Napoleon, 25 fathoms, three specimens, males. 



CoU. Hart : Dobbin Bay, at a depth of 30 fathoms, one specimen, 

 a female with ova. 



The differences between the sexes in S. septemcarinata are less 

 marked than in the preceding species. The females are but little 

 larger than the males ; and the rami of the appendages of the post- 

 abdomen differ but slightly in the two sexes (see Kroyer, Nat. 

 Tidsskr. I. e. figs. 43, 44). In small specimens the fourth segment of 

 the postabdomen has a small spine at its infero-latcral angle, which 

 is usually absent in the adult. Among the large number of speci- 

 mens collected there is but a single female with ova. Length of this, 

 the largest specimen, 2 inches 6 lines (nearly 64 millims.). 



This species is probably as widely, but less abundantly distri- 

 buted than C. horeas throughout the circumpolar region. It occurs 

 on the coasts of Arctic America (Igloolik, Felix Harbour), the Shet- 

 lands, Norway, Greenland, and Spitzbergen ; and its range extends 

 eastward to Kamtschatka (Ryan). 



