786 LIST OF ILLUSTRATIONS. 



Plate III. Fig. '20. Chironomus, species fl, (p. 693;) larva, lateral view, enlarged six 

 diameters. Drawu by J. H. Emerton. 

 Fig. 21. The same ; papa, lateral view, enlarged six diauieters. Drawn by J. 



H. Emerton. 

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

 eters. Drawn by J. H. Emerton. 

 Plate IV. View of salmou-pens and spawuing-sUed, Backsport, Me., (p. 248.) From 



Harper's Magazine. 

 Plate V. Fig. 1. Interior of spawuing-sliod, Backsport, Mo., (p. 243.) From Harpei-'s 

 Magazine. 

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

 Harper's Magazine. 

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

 87 feet to an inch. 

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

 an inch. Showing location of hatching- works and salmon-pond. 

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

 Scale, 20 feet to an inch. 

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

 Plate VIII. Plan of salmon-net, Peuobscot Bay, (p. 305 ;) a, outer pond ; h, head grap- 

 ple-warp ; c, outer pouutl grapple-warp ; d, inner poand ; c, shear ; /, 

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

 side-elevatiou of this plan see PI. ix, 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 ; g, hook 

 grapple»-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 ; 

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

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

 Plate 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 ordinary 

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

 the bottom slopes oft' too steep to admit of the first style. (Per- 

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

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

 feet to an inch, a, great pound ; h, second pound ; c, fish-j^ound ; 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, Peuobscot River, No. 3, (p. 311,) ground-plan; scale, 36 

 feet to an inch. «, great pound; ?>, 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 inch, a, hedge ; h, big pound ; c, little pound. The arrow shows 

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

 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. 264, vol. 1 ;) ground-plan. 

 Scale, 32 feet to an inch. Showing leader, heart, tunnel, and pot. 



