XIV LIST OF ILLUSTRATIONS. 
Page 
WIG. 6.—Theisame, ready for use) -<- << - cceceececenececmccecesnleneccsscecerccscscecscceciescaeas - 497 
7.—The same, showing position in the water ....... 22.22. -- 0-26 - ccne ne nee n nee enc ene cenene 497 
8.—Incubating apparatus used in the Netherlands ..........-.--.---------+----- SSapeeqecoe | allt) 
9.—Frame used in connection with same-..........-. sneeaece beso ccdo Ss ocisososenososshassed 500 
10! —Larger form of same)s--- 2. .-2ses-cesecedeniaceancaneee=ve QSOS aco Shcoo doo naeScoscoadead 500 
11.—Coste’s incubating apparatus for trout eggs-........ SqeebodocSoodceactcas sissiomadsoasescs 501 
12.—Larger form of same used by the College of France.......---.-.----------+----- abecaad 501 
13.—Hatching-box for use in pure running water ........ alonosesebaododacnccbodctassestahac 502 
14:— Terracotta hatchin g-Vesselsic<cewscene eins cemeaeais cise esccelewelcie eins nie sisiasicteweeisaeineincte 502 
15;—Wackerhatching-basket.:withiloatay soecnese sacee ee teae ene ean cs <ae ein cena ane iee 502 
16:—The same, ‘withoutifloats est ocseacee cance cece cece twccanpetemaanel cscs cocsmereenccs 503 
17-—Coste’s hatching-box for both free and adhesive eggs .....-.---20-----22-eeneneeeeeee-- 508 
18.—Parasitic plant injurious to eggs --.....-.--.-----..--6- Seabee cease eee co ec acasce eam 505 
19.—Leptomitus clavatus, another destructive parasite ..... eeeseecsccue wesc dacetsiedseeweee 505 
20:—Pincers for removing bad Of ese cons esc eniecssadecee sence ensenetectonsccmccae neers me 506 
21.—Several species of diatoms very destructive to eggs ....-..---2.---2-+--------- pogsiecocd 506 
22.—Series showing the development of the embryo in the egg...........------.--2------- - 507 
23:—Onutlineiof newly-hatched fishseseecsseecesacslececiecweacesteonaceeasaeteecscicesem ccc 508 
24.—Surface view of the series of feeding-tanks for young fish used by the Netherlands 
Wish\Commissionysssssaceseansceseaceasseeesee es Boaccacbesosbcasse Gagsscdococes dédoes 509 
25.—Longitudinal section of a single feeding-tank..........-.--2-2- 0-220 scenes eee e- ene eee 510 
26.—The same scries as in Fig. 24, shown in vertical section ...-....------.s2020seeeeeeeee 5) i) 
27.—Diagram of the same series .....-.-....----------- Sac DOOeEboS Solauacecassice Weseteedeces 510 
FISH-PONDS OF THE BASSIN D’ARCACHON. 
Fic. 1.—Elevation of sluice for introducing fresh water. .-----....-2-------+-----ee 222+ --- eee --- £19 
2 —Ground-plamOfsames-ons ss eseeses snc eea see seme see seisecieceeeeteseneemaeseees se cnenee 519 
OYSTERS AND OYSTER-CULTURE IN SCHLESWIG-HOLSTEIN. 
Gs al — We We OL SOA-HaAtSlo---soe essence nececeacniceces seer eces BOER Bap ea aU cecOnU BS COBadEOC 685 
IN EY OREN aS 5 ae aseeabn Ss So oCe CECE CSRbOReHaGaoc ons coe SESerauSHuabadaeconHoEbaadeasoAd 686 
2.—Cross-section of a deep channel in the sea-flats; with an oyster bed ..............------ 688 
BY Oe Rey et yi san ASSIS TORI ONOCIG HESOLC AOOUb SSObuCHCo nao Hono dnedsancconboddosdansoscd 689 
4.—F ull-grown oyster with left valve removed. .-...-.--....--sescccccceceecceccn cence enone 691 
5.—Longitudinal cross-section of a seven-year old oyster .-..----.22---2-2---- cee ence eee eee 693 
6:—spermatozom OL oyster: sercccsccscsceoeles secs cosas sincectwen acc sesccmisstnecaicecinctleis cise 693 
7.—Stages of development of embryo oyster. --.---2- 22-0225 cecene eee c esc e ene cen ecenn-ecee 695 
8.—Outline figures of young oysters, natural size ........---- 0-2. ence e ene cence een nen eee 699 
9.—View of sea-flats.....-....- BeOS ROSH SABES Osseo oo RS aU Sh ceteeodboessdasesobotsaddescks seer 707 
OYSTERS AND MUSSELS AND THEIR CULTURE IN FRANCE AND ITALY. 
FIG. 
1.—A twig bearing young oysters, natural size .....-. 22.222. e none ween ce cows ce ccc eccne ee 7155 
2.—Shell of cardium covered with young oysters, natural size.......-....------e-e0---- eee 756 
3.—Embryo of oyster, much enlarged .............---- EROS OOCE SEO Soo aH e SeseoESCHtOnSaScr 763 
4.—Oysters of different ages, natural size ........-.-...--------- Sesasabe - Jonagoapognegdsoe 764 
5.—Artificial oyster rockery of Lake Fusaro, Italy. .......2---.-.---------0 cee ee cence e nee 782 
6.—Bundles of twigs suspended between upright posts of same .....2.-2--------------2---- 782 
7-——-Kascine colléct0rqcosess-2-cene= = seeeae sateen eesiceeecsiseraenincecnenasae SOSE EBODSEOOST OSC 785 
$:—Platformcollectoncspecesceeeee senses esciecnceslsetecticncse mac seecinesse anes cmeceessenti 787 
9:—Box collector; exterior VidW- ccs scec svieceulisciscenccececus dcesisensesaciecssictccoriees smear 790 
10:—Inner frames orboxcollectorsscerescesseceseswecioceeslencraciece = stascines ssccmeneemene 791 
11.—Box collector, interior view --....-...-.--.--6 BER ICAO OB OO CESAR Hino pococotasenassac 791 
12.—Tile collector, simple form---..-......-.----.- SCARCE DSU CEO EOA S DERE CHOOE SACO CanOSHOSOC 794 
13.—Double tile collector....-....-...--.. SORE Bone cO SCECOO CSCS UOHDCHIEG GEBOE SRaneHS ERO COOS 794 
14.—Tile collector, oblique form ................2--ce-e-ccnee SEE an dnadoseaobancacoocsoaa¢ - 195 
15:—Thesame; tenp1Orm =... .-cscccisesec cle sucecideceseieene=s< Seale ci datmscr ences senewenesene as 795 
16:—Kemmeren tiles cnc<oscsoses -oeuest coe csseccacieseedicaeseces ase aceoe! eR ReECHOOCOOBORSSS 796 
17.—Tile collectors, other forms.-.............---- SoCSOCeoeSAS i gelubescocssith a sseseiesecmacise 796 
18.—Claires, vertical section and bird's-eye VieW......---..eccenee- es 02 een eee e ener ene - eee 806 
19.—Mussel-culture, fisherman in his acON—...0- 52. -<enccccccessasannsscenocacccnce Bscegoas 811 
20!— ows Crawls £0F MUSsels)s =~. soNewn ca sewsceccecesseccss a ppOCAUEHabaCSaussStasesoosaesecas 813 
21.—F alse crawls, loaded with mussels..........-+----2+--0-- ssiwevee Jodo ose oe cape tees weal 814 
22.—Raft collector, used in mussel-culture...... Hbodeos Seecnes Gaboo¢aSodd oobdaS aaoeseaeesicsle 818 
