ANALYTICAL INDEX. 



fish of various species, viii. , 36 ; only 

 partially fertile in fish kept in an aqua- 

 rium, viii., 36 ; artificial propagation, 

 viii., 37 ; presence of filaments, viii., 

 235, 236 ; formation of ovaries, x., 

 20 ; forms of eggs, x., 21 ; their 

 size, x., 21 ; mode of impregnation, 

 x., 22-24; f deposition, x., 24-30; 

 researches of Professor G. O. Sars in 

 regard to deposition of eggs, x. , 26 ; 

 prevalence of erroneous notions on 

 this point, x., 26; conditions neces- 

 sary to insure impregnation, x. , 27 ; 

 floating eggs, x., 28; ground eggs, 

 x., 29; development of eggs, x., 30- 

 32 



Ovens for cooking fish, Sir Henry 

 Thompson's recommendations as to 

 their design, vii., 25, 26, 27, 28 



Overbury, Sir Thomas, his opinions as 

 to the rivalry between England and 

 the Dutch on the sea, ix., 464 



Overcrowding in salmon rivers, vi., 



6,7 



Over-dredging, destructive to oysters, 

 v., 86 



Over-fishing insufficient to account for 

 the depletion of salmon rivers, ii., 

 317 ; or of seas, iv., 344 ; enactments 

 on this point applicable to Scotland, 

 iv., 93 ; its destructiveness to oyster 

 beds, v., 86 ; to fish in Chinese 

 waters, v., 182-184; its effect in 

 Scotland, vi., 166 ; effect upon lob- 

 ster fisheries, vi., 329 



Oviducts, viii., 33 



Owen, Professor, his classification of 

 the Manatidoe, iii., 239; his opinion 

 upon the nautilus, iii., 279, 280; 

 upon the sea serpent stated to have 

 been seen fr om H. M.S. "Daedalus," 

 iii., 408 



Oxford Angling Association, iii., 125 



Oxford (United States), crab cannery 

 there, v., 50 



Oxidation, its effects, i. , 336 ; is the 

 source of animal heat, i., 348; and 

 of muscular power, i., 349; carbon 

 oxidized in food, i., 351 ; extracts 

 from Liebig's "Animal Chemistry" 

 on oxidation, i., 439 



Oxygen, a familiar gas, i., 335 ; its 

 absence destructive to oyster spat, 

 v., 95, III ; means of supplying it, 

 v., 96 ; its conversion of matter into 

 living organisms, vi., 299 ; a necessity 

 tor life in fish, vii., 46 



Oxyrhinchus, a Nile fish reverenced by 

 a people of Ancient Egypt, iii., 36 



Oysters and oyster culture, importance 

 of the trade in oysters, i., 47 ; close 

 season in Britain, i., 245; chemical 

 analysis, i., 364; mention of oysters 

 in Rogers' " History of Agriculture 

 and Prices in England," i., 395; 

 their value as food in mediaeval 

 times, i., 402 ; extract from T. 

 Venner's " Via Recta ad Vitam Lon- 

 gam" (1650), concerning them, i., 

 429 ; their abundance in the Chris- 

 tiana Fjord, i., 527; dredging in 

 Great Britain, ii., 246; consumption 

 of oysters in Paris, in 1710, ii., 260; 

 their occurrence in mythology, iii., 

 29 ; in mystic fancy, in'., 52 ; in her- 

 aldry, iii., 68 ; in royal crests, iii., 76 ; 

 possible depletion of oyster beds, iv., 

 1 6 ; schemes for increasing the supply 

 of oysters, iv., 69 ; effect upon them 

 of the Act of 1868, iv., 88; close 

 times, iv., 97, 98, 100; their possible 

 exhaustion, iv., 97; dredging for 

 oysters in the English Channel, iv., 



98, 99, 109 ; powers of the Board of 

 Trade regarding their cultivation, iv., 



99, 100, 1 06 ; their scarcity, iv., 100 ; 

 deposit and growth of spat, iv., 100 ; 

 natural enemies of the oyster, iv., 

 212 ; destruction of spat by the 

 " wondyrchoum " in olden times, iv., 

 315 ; importation of oysters into Eng- 

 land from France, iv., 337 ; destruc- 

 tion of spat by mackerel, iv., 349 ; 

 spawning of oysters, iv., 349 ; suc- 

 cessful results of the application of 

 scientific knowledge to their culture, 

 iv., 412; oyster fisheries in the 

 United States, v., 10, 24, 25, 29-31 ; 

 artificial hatching in the United 

 States, v., 14; abundance of oysters 

 in that country, v., 18 ; the fishery 

 in the Gulf of St. Lawrence, v., 19; 



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