X LIST OF ILLUSTEATIONS. 



POND CULTUEE.o 



Page. 



Fig. 1.— Ponds on sloping ground ^"^ 



2. — Ground plan and elevation of pond -. 480 



3.— Planofdiko 482 



4.— Plan of ditch 483 



5.— Laying out tho dike - 484 



6. — Plan for removing earth from ditch to dike 487 



7. — Another plan for the same 490 



8.— Plan for digging the ditch 494 



9.— Covering the dike 497 



10. — Apparatus for making fascines 499 



11. — Fasciuo piuchera 499 



12. — Putting the fascines on tlie dike 501 



13.— Covering dikes ^vith wicker-work - 502 



14. — Plan of weir for pond 509 



1.5.— Standpipo 513 



16.— Tap for exit-pipe 515 



17.— Contrivance for drawing the tap — 515 



18. — Grates for inlet and outlet 517 



19. — Nets for sorting and keeping flsh - 611 



20. — Screen or standing-net .- 614 



21. — Seine used in pond fisheries 615 



22.— Purse-net C16 



23. —Pike purse-net 616 



24.— Eel puree-net 616 



25.— Sorting-tub 617 



26.— Sorting-table, with perforated leaf 617 



27.— Sorting-table, with net 617 



28.— Sorting- van 618 



29.— W.iter-dipperB 618 



30.— Net-harrow ^ ; 619 



31.— Tap-basket -' 619 



32.— Scales for weighing fish 620 



33.— Boats for storing flsh 620 



34.— Cast-net 620 



35.— Dip-net 631 



36.— Hose-not 621 



37. — Bag-net or hoop-net 622 



38.— Threefold net 622 



39.— Fish-pots 622 



40.— Fish-keg 623 



41.— Shed for fishermen 624 



42. — Arrangement of tubs and sorting-vans 625 



43. — Sorting-tub for receiving flsh from the soales 626 



44. — ^Knife for cutting willows 641 



THE OYSTER.* 



Plate I.— Stages of development, 10 figures 910 



H. — Stages of development, 11 figures 910 



THE MEDUSiE.io 



Plate I. — AtoUa Bairdii, from exumbral surface 078 



IT. — Atolla Bairdii, from subumbral surface 978 



111. — Atolla Bairdii, lateral view 978 



rV. — AtoUa Verrillii, from exumbral side 978 



v.— AtoUa Verrillii, different views 978 



VI. — ^Nauphantopsis Dioraedeje, two views 978 



* In Nicklas's Pond Culture. 



' In Horst's Development of the Oyster. 



'" In Fewkes's Mednsse Collected by the Albatross. 



