748 Bulletin 4y, United States National Museum. 



Gasteroslens elegans, Blanchaei), Poissons des eaux douces de France, 234, 186G, Cadillac and 



Langou; 6 jjlates. 

 Gasternsteiis argyropomus, Cuvier & Valenciennes, Hist. Nat. Poiss., iv, 498, ]8'2!», Florence; 3 



plates. 

 GasteroslevshrnchiiceiiMtx, Cuvier & Valencienne-;, Hi.-^t. Kat. Poiss., iv, 4!l'.t, lf<2'.), Florence; 4 



plate». 

 Gasterosteiis htrarantlnts, CuviER & Valenciennes, Hist. Nat. Poiss., iv, 490, 1820, Florence; 4 



plates; 4 dorsal spines. 

 Gasterosteus ahjcriensis, Sauvage, Revision des Kpinoclies, IT, 1S74, Algiers; plates. 

 Gaslerosteits idandiciis, S.vuvagb, Revision des t^pinoches, 20, 1874, Iceland; .'i jilates. 

 Gasterostmis gymmints, Cuvieu, Regno Animal, Ed. 2, ii, 170, 1820, 



Gasterosteiis fpiiiulontx, Jenyxs & Yarrlll, Manual, 350, Edinburgh; 4 dorsal spines. 

 Gaslerosteus amlealiis, Jordan & Gilbert, Synopsis, 395, 1883. 



1099. (iASTEROSTEUS BISPINOSUS, AValbaum. 

 (Common Eastern Stickleback.) 



Head 3^; depth 4i. D. 11-1,13; A. I, 9; lateral plates 33. Head rather 

 long. Caudal peduncle very slender, covered witli plates similar to those 

 on the body, and provided with a conspicuous keel. Processes from 

 shoulder girdle below, covering most of the l)rea8t, leaving a narrow 

 naked area between them. Opercle finely striate. Large rugose bony 

 plates on each side of base of dorsal spines, the latter joined to them by 

 a hinge and capable of being firmly set, like the spines, of catfish. 

 Naked area in front of pectorals large ; pelvic bone lanceolate ; ven- 

 tral spine with a basal cusp ; spines all serrate, those of anal and soft 

 dorsal small. Dark greenish above ; sides silvery, or yellow ; membranes 

 of ventrals often red. Length -i inches. The stickleback of the east 

 coast of North America seems to differ from the European Gasierosicus 

 aculeatus in having higher spines and more slender body. The dorsal 

 spines when depressed each extends beyond the base of the next. In other 

 respects G. his2>inosiiif does not difter materially from G. aculeatus. The 

 typical marine form has the body fully plated as in the marine form of G. 

 aculeatus; its partly naked fresh-water varieties («<^/«s((, ouvieri , wheatlandi) 

 are better defined than those of G. aculeatua, and are less abundant, being 

 still rare in collections. Labrador to New Jersey, near the coast, in salt 

 water; very common in New England. (&(s, two ; sjnnosus, s-pined.) 



Two-apined SticHebacl;, Pennant, Arctic Zoiilogy, ir, 385, 1784; after Forster; no locality 



specified. 

 Gasternsleus lispiiiomf:, Waldaum, Artedi Pisc, 4.50, 1792; after Pennant; said to be " New 



York," but more likely Hudson's Bay ; Jordan & Gilbert, Synopsis, 395, 1883. 

 GaslerostetisbiactdeatH.^SiiAv;, Zolil., IV, COS, 1839; after Pennant, as above; Storer, Hist. Fishes 



of Mass., 88, plate viii, figs. 2 and 3, 1867. 



Represented in the rivers of Maine and Quebec by 



1099a. GASTEROSTEUS BISPINOSUS ATKINSII (Bean). 



Head 3^ ; depth 4f ; eye 3i ; snout 3, a little greater than eye, pointed ; 

 mouth oblique, maxillary shorter than eye. D. II-I, 12 ; A. I, 8. Lateral 

 plates variable, usually from 10 to 22 in number, the posterior ones small 

 and weak ; caudal peduncle depressed, keel usually developed. First and 



