LIST OF ILLUSTRATIONS. 



Plate I. 

 II. 



in, 



IV. 



V. 



VI. 



VII, 



vm 



IX. 



X. 



XI. 

 XII. 



xni. 



XVII. 



XVIII. 



XIX 



XX 



XXI 



Plate 1. 



Page. 



Manchester Station, Iowa, Rearing-pontls and Hatchery VII 



Bird's-eye view of St. Johusbury Station, Vt XIl 



Fishway, improved Cail System XXX 



Car No. 3, Exterior XXXI 



Car ISTo. 3, Interior XXXIV 



Main Entrance to Aquarium, Omaha XXXVI 



General View of the Fish Commission Exhibit, Omaha XXXVIII 



Interior of the Grotto, looking from one of the Pools, Omaha XL 



(1) Hatchery at St. Johnsbury, Vt. (2) Boat equipped with Jack-light for cap- 

 turing Trout at night on their Spawning-beds at Caspian Lake XLIV 



Two Views of Trap at Groton, Vt., 1897 XL VI 



Hatchery at Gloucester ; View from Gloucester Harbor L 



Interior view of Gloucester Hatchery showing Cod Boxes in operation LII 



Development of the Whitefish Embryo.— (1) Unfertilized Whitefish Egg, 2i 

 hours old. (2) Fertilized Whitefish Egg, 6 hours old, germinal discs forming, 

 no segmentation having taken place. (3) "Whitefish Egg, 12 hours old, .show- 

 ing first Cleavage ; water, 38°. (4) Whitefish Egg, eighteenth hour, water 38°, 

 showing second Segmentation; 4 cells formed. (5) Whitefish Egg, 24 hours 



old; water, 38°. (6) Whitefish Egg, 48 hours old; water, 38° LXXU 



Developmentof the Whitefish Embryo.— (7) Fertilized Whitefish Egg, 72 hours 

 old, showing Segmentation well advanced. (8) Whitefish Egg, seventh day, 

 Embryo beginning to show. (9) Whitefish Egg, 43 days okl, showing Embryo. 

 (10) Whitefish Egg, 90 days old, showing embryo. (11) Whitefish Egg Yolk, 

 ruptured by rough handling, 24 hours old. (12) Whitefish Eggs with triple 



discs LXXLC 



Development of the Whitefish Embryo.— (13) Whitefish Eggs showing twin 

 discs, 3 days old. (14) Whitefish Egg, twin disc, sixth day. (15) Whitefish 

 Eggs, showing twin discs, 7 days old. (16) Whitefish Eggs, showing twin 

 discs, 8 days old. (17) Whitefish Egg, showing twin discs, 13 days old. (18) 



Whitefish Egg, showing twin discs, 15 days old LXXU 



Developmentof the Whitefish Embryo (19) Double-headed Whitefish Fry just 



hatched. (20) Double-headed Whitefish Fry. (21) A Common Deformity of 

 Curved Spine of Whitefish Fry. (22) Whitefish Fry just hatched, three-eyed, 

 Curved Spine. (23) A Common Deformity of "Whitefish Fry. (24) Four-eyed 



Whitefish Fry LXXU 



Duluth Hatchery LXXX 



Duluth Hatchery, Nursery troughs, and Storehouse LXXXII 



Bass ponds at Manchester, Iowa LXXXIV 



Little White Salmon River, looking north, showing the two new Hatcheries, 



Office, and Mess-house C 



Little White Salmon Elver, showing Hatcheries and Lumber Flume CIV 



Eadulinus boleoides 26 



Averruncus sterletus 28 



Chart showing Oyster-beds of St. Bernard Parish, La 100 



Myrichthys pantostigmius 284 



Zalocys stilbe 284 



Cantherines carolse , 284 



Azurina hirundo 284 



Polyodon spathula. Lepisosteus platostomus 310 



Amia calva. Galeichthys felis 310 



Felichthy 8 marinus 310 



Ictalurusfurcatus 310 



Ictalurus anguilla 310 



V 



