THE ANGLER-NATURALIST. 



THE SHORT-SPINED STICKLEBACK. 



(Gasterosteus brachycentrm*.) 



In the number of side-plates the Short-spined Stickle- 

 back agrees with the Smooth-tailed species; the plates also 

 do not extend beyond the limits of the pectoral fin. It is, 

 however, of much larger size, whilst the spines are con- 

 siderably shorter, and the vertebrae more numerous. 



Fin-rays: D. III. + 13 : P. 10: A. 1+9: C. 12. 



THE FOUR-SPINED STICKLEBACK 



(Gasterosteus spimdosus f) 



is distinguished by having four spines on the back. It is 

 likewise exceedingly small, the figure being double the 



* brachycentrus, literally ' with short prickles/ from brachys, short, 

 and centron, a prickle, Gr. t spinulosus, spiny, Lat. 



