1. OASTEK0STEU3. 3 



Gasterosteua aculeatus, Linn. Si/st. p. 489 ; Gronov. Syst. ed. Gray, 

 p. 167 ; Block, t. 53. f. 3 ; Bl. 'Schn. p. 122 ; Donov. Brit. Fishes, i. 

 pi. 11 ; TurtoH, Brit. Faun. p. 101 ; Flem. Brit. An. p. 219; Fries 

 och Ek-str. Skand. Fi^k. p. 17. t. 4. f. 1 ; Thompson, Ann. Sf Mag. 

 Nat. Hist. 1841, vii. p. 95 ; White, Catal. Brit. Fishes, p. 35. 



Centriscus, sp., Klein, Pise. Miss. iv. p. 48. t. 13. f. 4, 5. 



Gasterosteus ter-aculeatus, Lacep. iii. p. 296. 



D. 1 1 1 1 -'-. A. 5^. P. 10. V. 1/1. Ctec. pylor. 2. Vert. 15/16. 



Sides of the body with a more or less complete series of scaly 

 plates. The two anterior dorsal spines one-third of the height/ of 

 the body. 



Var. A. Gasterosteus gymnurus. 



Gasterosteus gymnums, Cut: Regne Anim. 



leiurus, Cuv. i^ Val. iv. p. 481. pi. 98. f. 4 ; Varr. Ann. 8f Mag. 



Nat. Hist. iii. p. 522, and Brit. Fishes, i. p. 95 ; Owen, Catal. p. 56 ; 



Coste, Mhnoires Sci. Sac. Etrang. x. 1848; Gitnther, Neckarjische, 



p. 29. 

 Quarter-armed Stickleback, Parn. Ichth. Frith of Forth, p. 30. t. 25. 



Four or five scaly plates above the pectoral fin ; the remainder of 

 the body naked. 



Middle and Southei'u parts of Europe ; England, France, South 

 Germany, Baltic. 



a. Adult. New Biver. Museum Leach. 



b-e. Adult. Greenwich. Presented by W. Yarrell, Esq. 



f, (J. Adult. Poole Heath . Dorset. Presented by W. Thompson, Esq. 



h-Tc. Adult. Wandsworth. Museum teach. 



I, m. Adult. Lochend. 



n. Adult. Duddington Loch. 



o~r. Adult. England. 



s. Adult : nov good state, Baltic. From the Haslar Collection, 



t. Adult. From the Haslar Collection. 



u. Half- grown : bad state. 



v-y. Half-grown. Presented by Dr. Johnston. 



z. Half- grown. Museum Leach. 



a. Adult. 



/3. Adult: skeleton. 



Var. B. Gasterosteus semiarmatus. 



Gasterosteus semiarmatus, Cuv. Sf Val. iv. 493 ; Yarr. I. c. f. 127 h, 

 and Brit. Fishes, i. p. 94 ; Parn. I. c. p. 32. t. 22. 



The front part of the side with a series of ten to fifteen scaly 

 plates. 



France ; Belgium ; England. 



a~d. Adult. Greenwich. Presented by W. Yarrell, Esq. 

 e, f. Adult. Tweed. Presented by Dr. Johnston. 



