936 
Fig. 
-- PROFESSOR W. C. MINTOSH AND MR E. E. PRINCE ON 
3. Gadus ceglefinus, section through the blastoderm at the morula stage, 22nd hour, March 25, 
1886, 
a ‘, surface view of the edge of the lastodent and peeininge 26th howe Maxth 
30, 1886, : 
Adis utes " surface view of the same, 2 hours ine (28th cee 
5. T. qurnardus, yolk pitted by periblastic nuclei, viewed obliquely from above, 
6. 55 periblast and edge of blastoderm, May 26, 1886, 
7. fs similar view, 8th hour, June 25, 1886, 
8 similar view, 8th hour, May 26, 1886, : 
9. Gastrosteus spinachia, part of rim and of blastoderm when dene shart nivetenelts over 
the yolk-surface, 
. 10. G. eglefinus, section through the eed rim hon Bice at the Betis 4th ay, pail 
no germinal cavity present, 
. 11. Ovum of Solea vulgaris, showing Grouisiephores o over ie! yolk ad groups of sik globules 
segregated under the embryo, 
. 12. Ovum of Gastrosteus spinachia in the marae concer May ah 1886 : ct ee af ett 
ment to adjacent ova, 
. 13. Newly-hatched larva of Clupea deat, 
. 13a.Larva of Clupea sprattus, stage (in a somewhat sagen specimen gail seine page 
behind and below eye, and on the anterior surface of abdomen) more advanced than in 
_ the preceding figure, 
. 14. 7. qurnardus, May 24, 1886. Three oleaginous spheres were present in this ovum, 
g. 15. a, b, c, d, e, Pleuronectes flesus, vertical sections through the blastoderm on the 3rd day, 
April 7, 1886: a, through the middle of the germ ; ¢ through the marginal part, 
. 16. Ovum of Gadus eglefinus, marginal blastodermic cells sending out filamentous protrusions 
under pressure, 
. 17. Gadus eglefinus, vertical eeetion firang an ovum Leite fie rim noi ch the scaieibe. no 
germinal cayity appears, 4th day, March 24, 1885, 
. 18. Ovum of Gadus ceglefinus, vertical section through the blastoderm st the P-cell putas many 
vesicles are collected at the base of the blastomere, 
. Fig. 19. Ovum of the haddock on the 3rd day, at 10 a.m., viewed from ee 
Puate III. 
Fig. 1. 2. gurnardus of the 3rd day, transverse section through the cephalic region, 
Fig. 2. of the 3rd day, transverse section posterior to fig. 1, 
Fig. 3. of the 3rd day, transverse section through the terminal portion ms tamale 
(primitive streak %), 
Fig. 4 1 of the 9th hour, May 28, 1886, dephalte end : eutee 
Fig. 5. s of the 3rd day, May 27, 1886, snout of embryo, 
Fig. 6. G. eglefinus, of the 72nd hour, snout of embryo, 
Fig. 7. 5 of the 6th day, March 29, 1886 (Kupffer’s vésitle andl 1 Dlstpore, 
Fie. 8. G@. morrhua, of April 26, 1886, 10 a.m., end view, : 
Fig. 8a. al of April 26, 1886, eotnswbnt later than fig. 8, end view of eit snibaye 
Fig. 80. is of April 26, 1886, 11.40 a.m., 
Fig. 8c. 5 of April 26, 1886, 12.45 noon, 
Fig. 9. is of May 1886, side view of blastopore and adirentanie canal, &e. te 
Fig: 10. . of May 1886, side view of blastopore and neurenterie canal, &c., 
Fig. 11. G. ceeglefinus, of May 25, 1886, transverse section through the trunk (rim at equator), 
Fig. 12. s transverse section through the caudal region (primitive streak %), same stage 
as fig. 11, 
Fig. 13. # of May 26, 1886, transverse sae anh the een (rim pal quite 
Fig. 14. G. morrhua, of April 26, 1886, Kupffer’s vesicle viewed through the transparent embryo, 

