338 NEW YORK STATE MUSEUM 



As in E u c a 1 i a , the gill membranes form a broad fold across 

 the isthmus. Vertebrae 14-^-18=32. Species two, in northern 

 regions, the following cosmopolitan; a second, Pygosteus 

 sinensis Guichenot, from China. 



170 Pygosteus pungitius (Linnaeus) 

 10 spilled Stickleback 



Gasterosteus pungitius Linnael's, Syst. Nat. ed. X, 296, 1758, Europe; Gun- 

 THER, Cat. Fish. Brit. Mus. I, 6, 1859; Storek, Hist. Fish. Mass. 43, 

 pi. VIII, fig. 5, 1867; Beax, Bull. 15, U. S. Nat. Mus. 133, 134, 1879; 

 Jordan & Gilbert, Bull. 16, U. S. Nat. Mus. 393, 1883; Bean, 19th 

 Kept. Commrs. Fish. N. Y. 244, 1890. 



Gasterosteus occidciitalis De Kay, N. Y. Fauna, Fishes, 68, pi. 42, fig. 135, 

 3842; Stokeu, Syn. Fish. N, A. 63, 1846. 



Gasterosteus coneinnus Richardson, Fauna Bor.-Amer. Ill, 57, 1S8G, Sas- 

 katchewan River and Great Bear Lake. 



Gasterosteus ncbulosus Agassiz, Lake Superior, 310, pi. IV, fig. 2, 1850. 



Pygosteus pungitius Eigenmann, Proc. Ac. Nat. Sci. Phila. 235, 1886; Jordan 

 & Evermann, Bull. 47, U. S. Nat. Mus. 745, 1896; Bean, 52d Ann. 

 Rept. N. Y. State :Mus. 100, 1900. 



Body moderately elongate and compressed, its greatest depth 

 one sixth of total length to base of caudal rays, its width one 

 tenth of the same length and two fifths of the length of the 

 head. The head is one fourth of total length to base of caudal, 

 its width contained two and one third times in its length; the 

 length of the snout equals the width of the interorbital space, 

 and nearly one fourth tiic length of the head; the upper jaw is 

 slightly more than one fourth the length of head, and the man- 

 dible is nearly as long as the eye, which is contained about three 

 and one fourth times in length of head. The spinous dorsal 

 i inscricd at a distance from tip of snout equal to two sevenths 

 of total length without caudal; its base is a little longer than 

 tin- head; its first and second spines equal, and one fourth as 

 long as the head; its last spine less than one fifth as long as 

 th.- li.ad. The lusc <.f the soft dorsal is three times as long 

 as tli<- iiiaii.lil'Ic; the aiilrccdciit spinels as long as the mandible; 

 the Jirsl ray is longest, and is twic,. as long as the upper jaw. 

 Til.' anal oi-i-ii, is (^vio(. ns far froiii lip of snout as the spinous 

 <lorsal; ilic anal has.- is twice as long as the middle caudal 



