X ILLUSTRATIONS. 



The United States Bureau of Fisheries— Continued. Facing page. 



Plate CXLVI. Collecting cod eggs on a fishing vessel. Open-air salmon-rearing troughs, 



Craig Brook, Maine 1376 



CXLVII. Artificial spawning pond and raceway used in culture of rainbow trout. 



Interior of a typical trout hatchery 1378 



CXLVin. A fish transportation car. Interior of a fish transportation car 1382 



CXLIX. Deep-sea exploring steamer Albatross 1384 



CL. Trial fishing on the Albatross. Marine biological laboratory at Beaufort, 



N.C ,386 



CLI. Alaskan fish traps and runs used by natives on Chilkoot stream. Salmon 



trap in an Alaskan river 13^2 



CLII. A Penobscot River salmon weir. Largest seine in the world 1396 



CLIII. Catching and sorting the brood fish at a trout-cultural station in the 



Rocky Mountains. Stripping and fertilizing trout eggs 1400 



CLIV. Salmon hatchery at Baird, California 1404 



CLV. Fisheries steamer Fish Hawk. Main deck of steamer Fish Hawk, equipped 



for shad hatching 1^08 



CLVI. Fishery schooner Grampus. The fresh-fish fleet at T Wharf, Boston 14 12 



TEXT FIGURES—PART I. 



International regulations of the fisheries on the high seas: Page. 



Map showing area delimited by the North Sea Convention of 1882 117 



Map showing territory covered by the Anglo-Denmark Convention of igoi 123 



Map showing area designated in the award of the Fur-seal Arbitration Tribunal 129 



A method of lobster culture. 



Fig 1-3. Larval lobsters, lateral view 224 



4-7 Larval lobsters, dorsal view 225 



A process for preserving the pearl-oyster fisheries: 



Fig. I. Plan of tray to contain pearl oysters for radiographing 309 



2 Longitudinal section of tray shown in figure i 309 



3. Conveyer to substitute for tray shown in figures i and 2 310 



Goldfish and their culture in Japan; 



Typical forms of goldfish tails 384 



Commercial sponges and the sponge fisheries. 



Fig. I. Hook used by the sponge fishermen of Florida 436 



2. Dredge, or gangava, used in Mediterranean sponge fisheries 487 



3. Section of dredge frame, showing bend of iron bar at ends 488 



4. Transverse struts sometimes used between bars of dredge frame 488 



A PR.\CT1C.\L method of SPONGE CULTURE: 



Fig. I and 2. Showing insulated attachment for lead-covered lines supporting sponge cut- 

 tings 562 



3. Needles used for threading cuttings on supporting wires 567 



4. Diagram showing average rate of growth of sponges from cuttings of various sizes 



, at Anclote Key 571 



5 Diagram showing average rate of growth of sponges from cuttings of various sizes 



at Sugar Loaf Key 572 



6. Diagram showing comparative increase in volume of an entire sponge and of the 



aggregate of cuttings from sponges of equal volume 575 



7. Diagram showing percentages of mortality among difTerent lots of sponges grown 



from cuttings at Sugar Loaf Key and Biscayne Bay 577 



