VIII BULLETIN OF THE UNITED STATES PISH COMMISSION. 
FISHES OP COZUMEL, YUCATAN.— BEAN. 
Plate XXVIII. Page. 
Fig. 1. Ostracion bicaudale 194 
2. Ostraeion bicaudale 194 
3. Ostracion bicaudale 194 
Plate XXIX. 
Fig. 1. Xyrichthys ventralis 198 
2. Xyrichthys infirmus 198 
3. Pempheris mulleri 198 
4. Scarus cuzamilce 198 
METHODS OF HATCHING FISH EGGS.-PAGE. 
Plate XXX. — Method of regulating water supply from a spring 208 
XXXI. — Tank for regulating supply from water-mains 208 
XXXII. — Manner of distributing water to the hatching-tables 208 
XXXIII. — Electric index and alarm-bell to water- tank 210 
XXXIV. — Working drawings of hatching-table 212 
XXXV. — Arrangement of jars and aquaria for fry of shad and whitefish 214 
XXXVI. — Diagrams Ulustratiug the arrangement of fish eggs in a square inch 216 
Fig. 1. The McDonald universal hatching-jar 209 
2. Funnel for introducing eggs into jar 210 
3. Position of tubes in disconnecting water supply 212 
4. Method of measuring eggs in jar. 218 
THE STURGEONS AND STURGEON INDUSTRIES.-RTDER. 
Plate XXXVII. 
Figs. 1-5. Showing the eggs and embryos of the common sturgeon and sterlet 282 
Plate XXXVIII. 
ITigs. 6-8. Embryos of the sterlet, more advanced 284 
Plate XXXIX. 
Figs. 9-11. Embryos of the sterlet, still more advanced 286 
Plate XL. 
Figs. 12-15. Young or larval sterlet 288 
Plate XLI. 
Fig. 16. Larval sterlet 290 
17. Head of larval sterlet 290 
Plate XLII. 
Pig. 18. Side view of the just-hatched larva of the common sturgeon 292 
Plate XLIII. 
Figs. 19-20. Young sterlet, two months old 294 
Plate XLIV. 
Fig. 21. Side view of young sterlet 296 
22. Young of the great Huso T 296 
Plate XLV. 
Fig. 23. Dorsal aspect of the young of the common sturgeon 298 
24. Dorsal aspect of the young blunt-nosed sturgeon 298 
Plate XL VI. 
Fig. 25. Side view of the young of the common sturgeon 300 
26. Side view of young of blunt-nosed sturgeon 300 
Plate XLVII. 
Pig. 27. View of under side of young of the common sturgeon 302 
28. View of under side of young of blunt-nosed sturgeon...... .... 302 ' 
Plate XL VIII. 
Figs. 29-30. Views of upper surface of heads of females of the common sturgeon 304 
31. Vie w of upper surface of head of male of the common sturgeon 304 
Plate XLIX. 
Figs. 32-33. Side views of heads of females of the common sturgeon 306 
34. Side view of head of male of common sturgeon .' 306 
Plate L. 
Figs. 35-36. Views of the under side of heads of females of the common sturgeon 308 
37. View of the under side of head of male of the common sturgeon 308 
Plate LI. 
Acipenser sturio. Female with roe exposed 310 
Plate LII. 
Acipenser sturio. Dorsal view of female : 312 
