no VERTEBRATE ANIMALS OF THE UNITED STATES 



G. hispinosus Walbaum. Length loo mm.; head 3.5; depth 4.5; 

 color dark greenish above; sides silvery or yellow; ventral membrane 

 often red; dorsal spines long and slender; rays of dorsal fin II-I, 13; 

 anal I, 9; lateral plates 2>y, caudal peduncle very slender: Atlantic 

 coast from New Jersey to Labrador, ascending the streams; very com- 

 mon in New England. 



Subspecies of G. hispinosus 



G. b. atkinsi Bean. Head ^-y, depth 4.75; lateral plates 10 to 22; 

 rays of dorsal fin II-I, 12; anal I, 8: fresh waters of Maine and Quebec. 



G. h. cuvieri Girard. Head 4; depth 5.5; rays of dorsal fin H-I, 12; 

 ana] I, 8; lateral plates 4, on the anterior part of the body: east coast of 

 America from Labrador to Massachusetts, in fresh and brackish water; 

 not common, except northwards. 



Fig. 48. — Eiicalia inconstans {from Fishes of Illinois). 



G. cataphractus (Pallas). Alaska stickleback. Very close to G. 

 hispinosus but more robust: Pacific coast, from San Francisco to 

 Alaska, ascending the streams; very common. 



G. williamsoni Gir. Similar to G. hispinosus, but the lateral plates 

 are nearly always wanting, or when present there are 2 or 3 on the 

 anterior part of the body; head 3.25 to 3.5 ; depth 3.25 to 4; dorsal spines 

 very small and weak; rays of dorsal fin H-I, 10; anal I, 8; males with a 

 red head: streams of southern California; very common. 



Suhspecies of G. williamsoni 



G. w. microcephalus Gir. Lateral plates varying from o to 25,. 

 usually 5 or 6 at the anterior end; dorsal spines stout: Pacific slope from 

 Alaska to Lower California ; common southwards. 



2. Eucalia Jordan. Body naked; dorsal spines 5; gill membranes, 

 forming a fold across the isthmus; pubic bones joined, forming a median 

 ventral plate: i species. 



