4 OASTEROSTEID.TC. 



Var. C. Gasteeosteus semiloricatus. 



Gasterosteus semiloricatus, Cuv. Sf Val. iv. p. 494; Tliompson, I. c. p. 95. 



The series of scaly plates rea hing to the front end of the caudal keel. 

 France; Ireland. 



Var. D. Gasteeosteus teach itrus. 



Gasterosteus trachunis, Ckiv. 8f Val. iv. p. 481. pi. 98. f. 1 ; Yarr. I. c. 



f. 127 a, and Brit. Fishes, i. p. 90 ; Parn. I. c. p. 33. t. 25. 



aculeatus, Eksti-o^n, Fische Morko, p. 153. 



trachurus, var. pontica, Nordtn. in Demid. Voy. Unss. Merid. 



iii. p. 357. 



The sides of body and tail entirely covered with a series of scaly 

 plates. 



Northern parts of Europe ; North Germany, England, France. 



a. Adult. Greenwich. Presented by W. Yarreli, Esq. 



b. Adult. Marsh at Plymouth. Museum Leach. 



c. Adult. Poole Heath, Dorset. Presented by W. Thompson, Esq. 



d. e. Adult. Tweed. Presented by Dr. Johnston. 

 /. Adult. England. Presented by Mr. Moore. 



g. Adult. Frith of Forth. 



h-Jc. Half-groT\Ti. Frith of Forth. 



l-n. Adult. Gotha River, Sweden. 



0. Half-grown. Norway. Presented by G. Woodfall, Esq. 



p-u. Fine specimens. From the Haslar Collection. 



V, w. Adult. From the Haslar Collection. 



x-a. Half -grown. From the Haslar Collection. 



/3-S. Adult. Europe. 



€-d. Yoiing. Europe. 



Var. E. Gasteeosteus notebokacensis. 



Gasterosteus aculeatus, Schoepff. 



noveboracensis, Cuv. 8f Val. iv. p. 502. pi. 98. f. 3 ; Dekay, 



New York Fauna, Fishes, p. 66. pi. 6. f. 17 (bad). 



Entirely similar to the preceding variety, but with the ventral spine 

 rather longer, reaching to the posterior extremity of the pubic bone. 

 Fresh waters of the northern parts of North America. 



a. Adult. Greenland. 



b. Several young specimens. North America. 



2. Gasterosteus argyropomus. 



Gasterosteus argyi'opomus, Cuv. 8f Val. iv. p. 498. 



D.l|l|l. A.l. P.O. V.1/1. 



Sides without any plates ; the anterior dorsal spines about one- 

 third of ihe height of body. 

 ItaTj'. 



a-e. Fine specimens. Rome. Presented by W. C. Trevelyan, Esq. 



