LIST OF ILLUSTRATIONS. 



Plate I. 



II. 



in. 



IV. 



v. 



VI. 

 VII. 



vin. 



IX. 



x. 



XI. 

 XII. 

 XIII. 



XIV. 



XV. 



XVI. 



XVII. 



XVIII. 



XIX, 



XX 



XXI 



Plate 1. 

 2 

 3. 

 4. 

 5. 



Page. 



Manchester Station, Iowa, Rearing-ponds and Hatchery VII 



Bird's-eye view of St. Johnsbury Station, Vt XII 



Fish way, improved Cail System XXX 



Car No. 3, Exterior XXXI 



Car No. 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 XLVI 



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, 24 

 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° LXXII 



Development of 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 old, showing Embryo. 

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

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



discs LXXII 



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 LXXII 



Development of 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 LXXII 



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 River, showing Hatcheries and Lumber Flume CIV 



Radulinus boleoides 26 



Averruncus sterletus 28 



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



Myrichthys pantostigmius 284 



Zalocys stilbe 284 



Cantherines carolas 284 



Azurina hirundo 284 



Polyodon spathula. Lepisosteus platostomus 310 



Amia calva. Galeichthys felis 310 



Felichthys marinus 310 



Ictalurus furcatus 310 



Ictalurus anguilla 310 



V 



