a 
DEVELOPMENT AND LIFE-HISTORIES OF TELEOSTEAN FISHES. 
Fig. 15. G. morrhua, of March 16, 1886, side view of blastopore with a plug of yolk, 
Fig. 16. 7. gurnardus, of May 28, 1886, surface view of caudal end of embryo at an early stage, 
Fig. 17. G. eglefinus, of March 25, 1886, 4 p.m., similar stage to the preceding figure, 
Fig. 18. G. morrhua, of April 26, 12.30 p.m., aa view of caudal end, 
Fig. 19. i front view of cephalic end of embryo, with peculiar fold of SBE aia 
hypoblast, 
Fig. 20. Aa similar view to fig, 18, : 
Fig. 21. 5 of May 12, 1886, blastopore closing, 
Fig. 22. T. gurnardus, of May 28, 1886, 4th day, caudal end of ane viewed laterally; 
Fig. 23. G. morrhua, of May 16, 1886, 90th hour, caudal end of embryo and blastopore viewed 
from above, 
Puate IV. 
Fig. 1. Transverse section of embryo of Plewronectes flesus, 4th day (snout), 
Fig. 2. i 5 PA », 4th day (fore-brain), 
Fig. 3. of m5 > », 4th day (optic vesicles), 
Fig. 4. A om - », 4th day (nuchal region), F : 
Fig. 5a. ; os 59 » 4th day (posterior region of the trunk), 
Fig. 5b. % : op », . 4th day (posterior region of the trunk), 
Fig. 5c. % 29 ; » 4th day (posterior region of the trunk), 
Fig. 5d. § 5 = » 4th day (posterior region of the trunk), 
Fig. -5e. 5 e ; » 4th day (close to margin of rim), 
Fig. 5f. . = § », 4th day (close to margin of rim), 
Fig. 6. x % x) » immediately posterior to fig. 5), 
Fig. 7. ) bn i ,, the two layers of fig. 5e, : 
Fig. 8. 5 a mh », the two layers of the blastodermic (extra- 
embryonic) area, 
Fig, 9. G. eglefinus, 5th day, hind end of embryo, 
Fig. 10. 0 5th day, otocystic region, 
Fig. 11. 7. gurnardus, 4th day, longitudinal section, 
Fig. 12. 3 4th day, slightly oblique longitudinal eniieal Sects Gantenal sagen 
Fig. 13. a oblique section through fore-brain and eye, . , - 
Fig. 14. P. flesus, oblique longitudinal horizontal section of anterior end of embryo, 
Fig. 15. G. eglefinus, oblique longitudinal horizontal section of anterior end of embryo (rim at the 
Fig. 15a. y 
Fig. 16. - 4th day, oblique longitudinal horizontal section, further advanced than 
fig. 15, 
Fig. 17. P. flesus, transverse section at a later stage than fg 4, 
Fig. 18. Molva vulgaris, horizontal section through the choroid fissure, , 
Fig. 19. S horizontal section through the choroid fissure at a lower plkine sham fig. 18, 
Fig. 20. * transverse section through fore-brain, 
Pirate V. 
Fig. 1. Molva vulgaris, front view of head, 6th day, x 
Fig. 2. 7. gurnardus, pigment-spots on the trunk, 4th day, June 1886, 
Fig. 2a. a yolk-sac, Ist day out, ; é 
Fig. 20. 3 pigment-spot on yolk-sac (three tags in progress of cor Pte) 
Fig. 3. P. limanda, ovum with abnormal embryo, May 8, 1885, 
Fig. 3a. os ovum with abnormal embryo, 3 days later, 
Fig. 4. Undermined ovum (r) with oil-globule (-034 inch in diam.), 
Fig. 5. 7. gurnardus, cyclopean embryo in ovo, 
Fig. 6. P. platessa, ovum with embryo well-developed, Resi 20, 188 6, 
VOL. XXXV. PART III. (NO. 19). 7D 
equator of the eg), 
oblique longitudinal horizontal section on a inner land than fig. 15, 
about 55 
x 250 
x 400 
x 400 
Enlarged 
Enlarged 
x 40 
Enlarged 
x 40 
