CHRONOLOGICAL CATALOGUE. 163 

 1874. Baird, Spencer F.— Contiunod. 



9. Inclined-plane fish- ways - p. 610 



10. The Pennsylvania fish- ways 610 



11. The common rectangular fish- way 611 



12. Brackett's fish-way^ 612 



13. Fish-waya with oblique partitions 613 



14. General arrangement ' 614 



E. Subsidiary considerations 615 



1. Protection against floods 615 



2. Material and cost 615 



X y I V On obstructions to the ascent of fish in certain rivers 617 



A. Obstructiens ih the rivers of Maine. By E. M. Stilwell 617 



Saint Croix River 617 



Penmaynan River 617 



Dennys River 617 



Orange River 617 



East Machias River 618 



Machias River 618 



"Wescongus or Pleasant River 618 



Narraguagus River 618 



Union River 618 



Penobscot River and tributaries 618 



Saint George River 619 



Medomac River 619 



Damariscotta River 619 



Sheepscot River 619 



Kennebec and tributaries 619 



Presumpscot River « 621 



Saco River and tributaries 621 



Mousam River 621 



Salmon Falls River 621 



B. Obstructions in the tributaries of Lake Cbamplain. By M. C. 



Edmunds 623 



Lake Champlain 622 



Saint Lawrence River and Lake Ontario 627 



C. Obstructions in some of the rivers of Virginia. By M. McKennie . 629 



D. Character of the streams on the northern shore of Lake Michigan. 



By J. F. Ingalls 630 



Pensuakee River 630 



Oconto River 630 



Peshtigo River 630 



Menomonee River • 630 



Cedar River 631 



Barque River 631 



Ford River ". 631 



Escanaba River 631 



"Whitefish River 632 



Sturgeon and Fish-dam Rivers 632 



Monistique River 632 



Seul Choix River 632 



E. Characters of some of the northern tributariea of Lake Michigan. 



By James "W. Milner 632 



Appkhdix E.—lTatural history 635 



XXV. The Crustacea of the fresh waters of the United States. By Sidney 



LSmith 637 



A. Synopsis of the higher fresh-water Crustacea of the ITorthem 



UnitedStates 637 



Macrura 637 



Family AstacidsB 637 



Family Palaemonidse 640 



Family PeDseidae 642 



Schizopoda 642 



Family Mysidse 642 



Amphipoda 645 



Family OrchestidaB ■. 645 



Family Lysianassidae 647 



