58 



NORTHERN ZOOLOGY. 



membrane which is attached to each of them posteriorly, is thicker and larger than in Icevis. 

 In both species the seventh and eighth spines are smaller than the preceding ones, and the 

 ninth, which is contiguous to the second dorsal, is rather longer than any of the others : in 

 concinnus it is only one-third lower than the second dorsal ; while in Icevis it is two-thirds 

 lower. The second dorsal and anal begin and terminate opposite to each other, and have 

 similar triangular shapes : the posterior angle of these fins in Icevis is more prolonged or acute ; 

 while in concinnus the fins have an equilateral outline, in consequence of their attachments 

 being shorter, and the naked tail longer. In concinnus the soft dorsal has nine rays — in 

 Icevis it has eleven. Contiguous to the anal fin of the former there is a separate spine, fur- 

 nished with its proper membrane, like the dorsal spines, the largest of which it equals in size : 

 in Icevis this spine is comparatively small. The ventrals are each represented by a spine 

 articulated to the pelvic bones, and a small triangular membrane in which there is imbedded 

 a very indistinct soft ray : the ventral spines do not reach quite to the point of the abdominal 

 cuirass in either species. All the spines, both dorsal and ventral, are moveable, and none of 

 them are serrated. The caudal fin is even at the end and has an elongated wedge shape. 



Colour nearly as in G. Icevis, olive green, with a silvery belly, and the whole body and 

 soft parts of the head speckled with black dots. 



Fins.— Br.3; DA/-1/-1/-1/-1/-1/-1/-1/ 1/9; A. 1/— 9; P. 10; C. 12| ; Kl/1. 





Dimensions. 















G. concinnus. 



G. 



Icevis. 







Inches. 



Lines. 



Inches 



Lines. 



Igt] 



i from tip of snout to end of caudal . 



. 1 



3| 



1 



8| 



93 



„ anus .... 







8 







11* 



39 



„ tip of gill-cover 



. 



4§ 







41 



39 



of attachments of second dorsal and anal 







2# 







4* 



99 



naked tail between dorsal and caudal . 



. 



2* 







2* 



39 



from anus to end of caudal 







8 







9* 



„ 



of longest rays of caudal .... 



. 



2| 







2* 



n 



,, second dorsal 







H 







»A 



a 



„ anal .... 



. 



4 







*A 



>> 









H 







1 



9) 







H 







H 



[32.] 5. Gasterosteus occidentalis. (Cuvier.) Newfoundland Burn.stickle, 



L'Epinochette de Terre Neuve (<3. occidentalis), Cuv, et Val., iv., p. 509. 



This species, which was discovered in Newfoundland by M. Pilaye, is very like 

 the nine-spined Stickleback of Europe with an armed tail : its form is merely more 

 lengthened. Fins— D. 8/9; A. 1/9; C. 12; P. 11; V. 1/11. {Hist, des 

 Poiss.) 



