LLST OF PLATES 



con CII-LNETS. 



Page. 



Platk T. — Method of hauging cod j;ill-nets iu Norway 16 



Plate II. — Manner in which the glass floats are attached to tlie tops of the nets 16 



Plate III. — "Way in which the sinkers are fastened to the bottom of the nets 16 



Plate IV. — Size of twine of which the American nets are made 16 



Plate V. — Norwegian method of setting the nets at the bottom 16 



Plate VI. — Way in which nets are set at different depths to ascertain the position of the fish ... 16 

 Plate VII. — Manner in which the ends of a gang of nets are attached to the stone anchors and 



buoy -line in Xorway ; also showing the position of the glass floats and sinkers 16 



Plate VIII. — Way in which cod gill-nets are set at the bottom on the east coast of Newfoundland . 16 



Plate IX. — The ordinary way in which cod gill-nets iiie .set floating at Newfoundland 16 



Plate X. — Norwegian net and trawl buoy made of gla.ss floats 16 



Plate XI. — Way in which cod gill-nets are set for underrunning in Ipswich Bay 16 



Plate XII.— Manner in which the nets are underrun 16 



SPANISH mackerel. 



Plate XIII.— ( I.) Fig. 1. Micropyle and micropylar area of egg 166 



2. Fninipregnated egg 166 



3. Morula stage of cleavage of the germinal disk 166 



4. Genninal disk of egg 166 



.5. Incipient blastoderm of the egg 166 



6. Developing blastoderm of the egg 166 



7. Blastoderm of the egg 7 hours after impregnation 166 



8. Embryo 11 hours after impregnation 166 



Plate XIV. -( II. i Fig. 9. Caudal view of embryo 168 



10. Embryo 14 hours after impregnation 168 



11. Transverse section of caudal view of embryo 168 



12. Embryo 18 hours after impregnation 168 



13. Young Spanish mackei-el 24 hours from impregnation 168 



Plate XV. — (III.) Fig. 14. Young Spaui.sh mackerel 30 hours from impregnation 170 



io. Young Spanish mackerel 45 hours from impregnation 170 



Pl.VIE XVI.— (IV.) Fig. 16. Spanish mackerel three days after it left the egg 172 



17. Head of Spanish mackerel six days after hatching 172 



sea-horse. 



Plate XVII. Fig. ] . Young sea-horse (Hlppocatnpu.s antiquvruin) i. . . . 199 



SILVER (iAR. 



Plate XVIII. Fig. 1. Egg of the silver giir {Ttjlosurus limgirostris) 300 



2. Gerniiual disk 45 hours after impregnation 300 



3. Germinal disk 10 hours after inipieguation ,- 300 



4. Blastoderm of silver gar 24 hours :\ Iter impregnation 300 



5. Blastoderm of silver gar 31-J- hours after impregnation '. ... 300 



C. Blastoderm of silver gar 43f hours after impregnation 300 



7. Head of embryo of silver gar 51 hours after impregnation 300 



8. Tail of embryo of silver gar 51 hours after impregnation 3fio 



