LIST OF ILLUSTRATIONS. 



Plate 

 number. 

 I. 

 II. 



m. 



IV. 



V. 



VI. 



VII. 



vm. 



IX. 



X. 



XI. 



XII. 



XIII. 



XIV. 



XV. 



XVI. 



XVII. 



XVIII. 



To face 

 page 



Anatomy of the Oyster 276 



Salinometer and Salinometer Cap 282 



Ground-plan and section of Ponds for Spat-culture 323 



Details of Filter for Ponds used for Oj'ster-cnlture 330 



Inner and Outer Faces of Shell of Typical American Oyster 340 



Views of Valves of Pacific Oyster 340 



Development of Oyster 340 



Views of Oyster Embryos 340 



Set of Oysters on Sliell, showing crowding 340 



Oyster Spat, 2 or 3 weeks old, on inside of Oyster Sliell 340 



Oyster Spat about 2 months old, on a Stone 340 



Oysters, 1, 2, and 3 years old 340 



Oysters 4 and 5 years old 340 



1, Photo-micrograph of Diatom. 2, Food of South Carolina Oyster 340 



1, Urosalpinx cinerea. 2, Mytilus edulii. 3, Sabellaria vulgaris, i, Fulgur carica 340 



Starfish attacking Oysters 340 



Bunch of Oysters, showing Growth of Mussels and Barnacles 340 



1, Crepidula fornicata. 2, Crepidiila plana. 3, Crejndula convexa. 4 and 5, Anomia 



glabra. 6, Pecten irradians . 7, Oyster attac hed to pebble 340 



FIGURES IN TEXT. 



Page. 

 41 



Gravel Filter 



Wire Filter 



Trough arranged for Eggs 



Longitudinal section of case of Atlantic 



Salmon Eggs 



Atlantic Salmon recently hatched 



Troughs arranged for rearing 



Stand of troughs for rearing Atlantic 



Salmon 



Hatching- troughs. Guard-screen, etc 



Cross-section through box after it has been 



packed and closed 



Egg-tray 



Foundation -board 



Ice-hopper 



Egg-trays packed and cleated 



Outside case 



Floating box 



Clark-Williamson trough 110 



Pans used in cleaning Eggs 148 



Shad-hatching Table 149 



Automatic Shad-hatching Jar 150 



Application of a Measuring Scale to a Jar 



of Shad Eggs 154 



Page. 

 Plan of Neosho Station, showing shape and 

 depth of ponds, with location of Hatchery 



and Superintendent's Dwelling 166 



Artificial Nest for rearing Black Bass (per- 

 spective and sectional views) 171 



Ovary of Yellow-perch with nearly ripe 



Eggs 183 



Part of a recently hatched mass of Yellow. 



perch Eggs 183 



Diagram of Tidal Cod Hatching-box 202 



Spring Frog or Leopard Frog {Rana vire- 



scens) 255 



Green or Spring Frog (Rana clamata) 256 



Figures illustrating relative size of the 



Tympanum in the two Sexes 257 



Common Bullfrog {Rana catesbiana) 258 



Western Frog ( Rana p rctiosa) 259 



Western Bullfrog (Rana aurora) 259 



Anatomical figure of the Oyster 278 



Tangle and Tackle 315 



Drill-dredge in position for work 316 



Drill-dredge open for emptying 317 



Receptacle for Cultch 324 



