FISHES OF NEW YORK 335 



ray; dorsal origin far in advance of anal origin, longest dorsal 

 ray five elevenths of length of head; anal base five eighths as 

 long as dorsal base, longest anal ray one third of length of head; 

 least depth of caudal peduncle contained three and one fifth 

 times in length of head, the lower caudal .lobe two sevenths of 

 total length without caudal. D. 12; A. 8. Scales before dorsal 

 30; before ventrals 25; between dorsal origin and lateral line 7. 



Color brown above, silvery below; on each scale on the upper 

 part of the body a darker brown spot near its posterior 

 extremity, which gives the appearance of a dark brown streak 

 along each row of scales; pectorals uniformly brown, or greenish 

 brown; ventrals dusky, nearly black mesially, the posterior part 

 of the fin still darker; no dark markings on dorsal or anal fins; 

 caudal dusky, plain. 



Atlantic ocean, two specimens known, both examined by Dr 

 Jordan, from whose description the above was taken. One indi- 

 vidual was secured by Samuel Powell at Newport R. I.; the other 

 was obtained by Dussumier in the Atlantic ocean and by him 

 presented to the Museum of Natural History at Paris. This- 

 example is 9 inches long. 



Order HEMIBRANOHII 



Half -gills 

 Family GASTEROSXEIDAE 



Sticklebacks 

 Genus EUCAL.IA Jordan 



Fresh-water sticklebacks, feebly armed, the skin not mailed,, 

 the dorsal spines few and nondivergent, the gill membranes 

 forming a free fold across the isthmus, pubic bones fully united. 

 One species known. 



168 Eucalia inconstans (Kirtland) 



Brook Stickleback 



Gasterosteus inconstans KIRTLAND, Bost. Jour. Nat. Hist. Ill, 273, pi. II. 

 fig. 1, 1841, brooks of Trurabull County, Ohio; STOKER, Syn. Fish. 

 X. A. 64, 1846; BEAN, Bull. 15, U. S. Nat. Mus. 130, 1879; JORDAX 

 . & GILBERT, Bull. 16, U. S. Nat. Mus. 394, 1883. 



