786 LIST OF ILLUSTRATIONS. 



Plate III. Fig. 20. Chirouomus, species a, (p. 693;) larva, lateral view, enlarged sis 

 diameters. Drawu by J. H. Emertou. 

 Fig. 21. Tlie same ; pupa, lateral view, enlarged six diameters. Drawu by J. 



H. Emerton. 

 Fig. 22. Chironoraus, species c, (p. 693;) larva, lateral view, enlarged six diam- 

 eters. Drawn hj J. H. Emertou. 

 Plate IV. View of salmon-pens and spawning-shed, Biicksport, Me., (p. 243.) From 



Harper's Magazine. 

 Plate V. Fig. 1. Interior of spawuiug-shed, Backsport, Me., (p. 243.) From Harpei-'s 

 Magazine. 

 Fig. 2. Interior of salmon-liatchiug house, Bucksport, Me., (p. 247.) From 

 Harper's Magazine. 

 Plate VI. Fig. 1. Plan of salraou-breeding works at Bucksport, Me., (p. 243.) Scale, 

 87 feet to an inch. 

 Fig. 2. Map of Spofford's Bronk, Bucksport, Me., (p. 249.) Scale, 1,300 feet to 

 an inch. Showing location of hatching- works aud salmou-poud. 

 Plate VII. Fig. 1. Ground lloor of the salmon-hatching house, Bucksport, Me., (p. 247.) 

 Scale, 20 feet to .an inch. 

 Fig. 2. Second floor of the salmon hatching-house, Bucksport, Me. 

 Plate VIII. Plan of salmon-net, Penobscot Bay, (p. 305;) «, outer pond; &, head grap- 

 ple-warp ; c, outer pound grapple-warp ; d, inner pouud ; e, shear ; /, 

 hook; g, hook grapple- warp ; h, run. Scale. 12 feet to an inch. For 

 side-elevation of this plan see PL is. Fig. 2. 



Plate IX. Fig. 1. Gang of (three) salmon-nets, Penobscot Bay, (p. 305,) ground plan. 

 Scale, 60 feet to an inch, a, pounds; &, head grapple-warp; c, outer- 

 pound grapple- warps ; d, inner pounds ; e, shear ; /, hook ; (j, hook 

 grappl^warp. 



Fig. 2. Same as with VIII. Scale, 36 feet to an inch. Side-elevation. &, head 

 grapple-warp ; c, outer pound grapple-warp ; g, hook grapple- warp ; 

 /(, run ; i, straddle-warp ; j, spring-pole ; h, poles ; r, river-bed. 

 Plate X. Same as VIII, (p. 305.) (Ideal perspective.) 

 P;.ate XI. Fig. 1. Same as VIII, (p. 305.) (Ideal perspective.) 



Fig 2. The fish-pound of salmon-weir at low water, (p. 30G,) Penobscot River. 

 Plate XII. Various styles of salmon-weirs ; to save space, the leader of each plan is 

 represented much shorter than it actually is ; No. 1 is the ordinarj'' 

 style; Nos. 2 and 3 are used in narrow or rapid tide-ways, or where 

 the bottom slopes off too steep to admit of the first stjde. (Per- 

 spective view of the smaller or fish-pound given in PI. si. Fig. 2.) 



Fig. 1. Salmon-weir, Penobscot River, No. 1, (p. 305,) ground-plau ; scale 32 

 feet to an inch, a, great pound ; Z), second pound ; c, fish-pound ; d, 

 leader ; /, direction of current during ebb-tide ; g, course of fish. 



Fig 2. Salmon-weir, Penobscot River, No. 2, (p. 310,) ground-plan. Scale, 37|^ 

 feet to an inch ; lettering same as in Fig. 1. 



Fig. 3. Salmon-weir, Penobscot River, No. 3, (p. 311,) ground-plan; scale, 36 

 feet to an inch, a, great pound ; h, second pound ; c, fish-pound ; d, 

 leader ; e, shore-line ; /, direction of current during ebb-tide. 



Fig. 4. Fish-weir, Saint Croix River, (p. 294;) ground-plan. Scale, 30 feet to 

 an iuch. «, hedge ; &, big pound ; c, little pound. The arrow shows 

 the direction of the ebb-tide current ; the fish-pound is placed on 

 the lower side of the big pound instead of the upper side as on the 

 Penobscot. 

 Plate XIII. Fig. 1. Improved pound-net of Lake Erie, (see p. 261, vol. 1 ;) ground-plan. 

 Scale, 32 feet to an iuch. Showiug leader, heart, tunnel, and pot. 



