1. 6ASTEE0STEUS. 5 



3. Gasterosteus brachycentrus. 



Gasterosteu8 brachyceutrus, Cue. ii; Val. iv. p. 499. pi. 98. f. 2 ; 



Tliompsun, I. c. p. 100 ; Yarr. Brit. Fishes, i. p. 96 ; Heck. Kner, 



Siissw(isserji>iche, f. 17. 

 aculeatus, var., Wliite, Catal. Brit. Fishes, p. 35. 



D. 1 I l|l. A.l. P. 10. V. 1/1. 



Three or four scaly plates above the pectoral fin. The anterior 

 dorsal spines only one-fifth of the height of the body ; the ventral 

 spine one -third of the length of the os innominatum. 



Itiily. 



4. Gasterosteus biaculeatus. 



Gasterosteus biaculeatus, Shaw, Zool. iv. p. 608 ; Peiiii. Arct. Zool. 



ii. p. 385 ; Cuv. 8f Val. iv. p. 503. 

 cu^deri, Girard, Bost. Journ. vi. p. 254. pi. 7. f. 1. 



D-l|l|f.- A.I. P. 9. V.1/1. 



Sides of the tail without scaly plates. The ventral spine with a 

 spinous process at the outer side of its base. Blackish. 

 Coasts of Newfoundland and Labrador. 



Gasterosteus biaculeatus, Dekay, New York Fauna, Fishes, p. 65, 

 pi. 3. f. 9, is a different fish, probably identical with Gasterosteus 

 noveboracensis. Strangely enough he says, " Vent with an anterior 

 pouch, analogous to that observed in Syngnathus." (?) 



5. Gasterosteus tetracanthus. 



Gasterosteu.< tetracanthus, Cur. >.y Val. iv. p. 499. 



Sides of the jjosterior part of body naked ; the anterior dorsal 

 spines shorter than one-third of the height of the body. {Guv.) 

 Italy. 



6. Gasterosteus spinulosus. 



Gasterosteus spimdosus, Jen. H,- Yarr. ; Jen. Man. p. 350 ; Stark, 

 Jameson's Edinh. Journ. 1830, p. 327 ; Yarr. Brit. Fishes, i. p. 97; 

 Parn. I. c. p. 36. t. 25. 



acideatus, var., TJiompson, I. c. p. 103. 



D-l|l|l|i- A.l P.9. V.1/1. 



Sides of the posterior part of body naked ; the anterior dorsal 

 spines about one-fom-th of the height of the body ; the ventral spine 

 does not reach the posterior extremity of the p'ubic bone. 



Fresh waters of Great Britain. 



a. Adult. Isle of Arran. Museum Leach. 



h. Half-grown. Berwick. Presented bv Dr. Johnston. 



