limit to the number which may be healthily maintained and exhibited. We have had the great advantage of having the following pages overlooked by Mr. W. A. Lloyd, of the Crystal Palace, to whom our best thanks are due for many valuable suggestions. The work is now presented to the public in the hope that it may add to the educational effects of our public aquaria, and be the means of rendering the education in zoology more popular and extensive. IPSWICH, September 21, 1876. CONTENTS. CHAPTER I. THE HISTORY OF AQUARIA. Works of P. H. Gosse - The Origin of Species' - Fish sup- - -- - An- Page I CHAPTER II. HISTORY OF AQUARIA-continued. - - - Priestley's discovery of oxygen - Trembley and his Hydras — - - - aeration Mr. Gosse's artificial sea-salts Hanover and tion Society Naturalists at British aquaria — The Crystal Palace Aquarium — History and structure of ditto — Ditto of Brighton Aquarium — Dr. Dohrn's aquarium at Naples — Professor Agassiz's aquarium at Penekese Island — The Pleasures and educational influence of aquarium keeping Cruelty to animals Streamless aquaria Relation of animal to vegetable life — Balance of ditto - Parasitic fungi on aquarium animals - Lloyd's contributions to literature of aquaria - Over-stocking aquaria - How to proceed in stocking an aquarium — Bell-glasses and their uses -De- velopment of green algæ in aquaria - How to arrest ditto How to keep down ditto - Temperature of ditto Water in aquaria not to be changed - Aquarium fountain - Aquatic - Where materials can be purchased Details of cheap aquarium - Over-stocking aquaria -Yellow-spotted salamanders - Mexican Great water newt — Superstitions regarding ditto Male and female of ditto Smooth newt Habits of frogs and toads - Goldfishes and their food-Three-spined sticklebacks - Nest-building habits of ditto - Rough-tailed stickleback - Miller's thumb- The loach - Food of loach perch - Common and Prussian carp - The bleak - Scales Circulatory system of aerating large aquaria- Mr. Kent on fungoid growth upon fishes · Probable cause of ditto - Selection of aquatic plants for ornamental purposes mare's tail Canadian weed (Anacharis) — Vallisneria · Flowers of ditto — Aquatic Polygonum — Water crowfoot MOLLLUSCA, INSECTS, ETC., OF THE FRESH-WATER Bryant's "Thanatopsis"-Stock of aquaria - Battles in ditto Mollusca of ditto - Limnea stagnalis - L. auricularia Habits of these two species - Limnea pereger - Geological antiquity of fresh-water shells dina vivipara Habits of ditto — Bythnia, Pisidium, and Sphærium - Use of ditto in aquaria - Swan mussel — Unios - Aquatic insects - Life-histories of ditto - Metamorphoses of ditto - Dragon-flies, larvæ of — Larva of Dyticus Fero- cious character of ditto-Dyticus marginalis, male and female - Habits of ditto - Great aquatic beetle (Hydro- philus); its habits Wriggling beetles - Water bugs Interest of aquarium objects — Microscopic life — Desmids and - Euastrum, Cosmarium, Closterium, and other desmids |