Jordati and Evermann. — Fishes of North America. 749 



second dorsal spines long and slender, about as long as from tip of snout to 

 pupil, slightly serrate ; pectoral spine also long and slender, nearly as 

 long as snout and eye, strongly serrate, and with cusp at base on outer 

 side; ventral plate long and narrow, about as long as the ventral spines. 

 Pectoral plate broad and deep. Upper part of body dark ; more or less 

 distinct, dark cross bands on posterior part of body, darkest on caudal 

 peduncle; base of caudal fin with a black bar; under parts silvery 

 except on caudal peduncle, where there are a few dark punctulations. 

 Quebec ; Maine. (Named for Mr. Charles G. Atkins, Supt. U. S. Fish 

 Commission Station, Craig Brook, Maine.) 



Gasterosleus (ilkin.<<ii, Bean, Proc. U. S. Nat. Miis., 1879, 67, Schoodic Lakes, Maine. (Type, 

 No. 22492. Coll. Atkin.^.) 



Represented along the Atlantic Coast in brackish water from Newfound- 

 land to Cape Cod by 



1099b. GASTEBOSTEUS BISPINOSIS CUVIERI (Girard). 



Head 4 ; depth 5i; eye 3^. D. 11-1,12; A. I, 8. Body slender and com- 

 pressed. Anterior part of body with four lateral plates, the first one 

 largest ; posterior half of body naked. Tail keeled. Smooth space in 

 front of the pectoral large and subcircular. Posterior processes from the 

 shoulder girdle strong, divergent, leaving a naked space between them ; 

 mouth small and oblique, the maxillary not reaching eye ; dorsal spines 

 long, acute, and serrate, about as long as distance from tip of snout 

 to pupil ; ventral spines slender, as long as snout and eye ; they also are 

 serrate and provided with a cusp at the base ; ventral plate long and nar- 

 row, as long as from tip of snout to ]josterior edge of preopercle. Color 

 uniform, grayish brown on head, back, and posterior half of body ; neck, 

 opercle, and naked space in front of pectorals silvery, minutely dotted 

 with brown. (Girard.) East coast of North America from Labrador to 

 Massachusetts, in fresh or brackish water, not common except northward. 

 (Named for Baron Georges Leopold Chretien Fr<^deric Dagobert Cuvier, 

 1769-1832, the father of comparative anatomy and, therefore, of classifi- 

 cation in ichthyology.) 



f Gasteroslertsdimidialns, Beinhardt, Fauna Gru-nlauilica, 32, 37, 1837, Greenland ; may lie a form 



of G. aciilcalus. 

 Gasta-osleits cuvieri, Girard, in Storer's Fishes of Nova Scotia and Labrador, 254, plate vii, fig. 



1, 1849, Bras d'Or, Red Bay, Labrador. 

 Gasterostetis wheullandi, Putnam, Proc. Essex Inst., v, 4, 18r.7, Nahant; Eigenmann, I. c, 2ii). 



1100. GASTEBOSTEUS CATAPHRACTUS (Pallas). 

 (Alaska Stickleback ; Salmon Killer.) 



Head 3 to 3i ; depth 4 to 41 ; eye 3^ = snout. D. II-1, 12 ; A. I, 8. Body 

 slender, compressed ; head small and pointed, mouth oblique, maxillary 

 not reaching eye; caudal peduncle depressed, keeled. Processes from 

 shoulder girdle slightly divergent, leaving a narrow naked area on breast ; 

 naked area in front of pectorals long and deep. Dorsal spines long and 

 slender, the length equaling distance from snout to pupil ; third dorsal 

 and anal spines very small, curved ; ventral spines long, slender, as long 



