54 EEPRODUCTION AND DEVELOPMENT OP TELEOSTEAN FISHES. 



Fl&. 19.— Same species, fertilized May 24th, 3 a.m. Drawn May 25th, 1.30 p.m. (1 day 

 10| hours) ; no cover-glass. 



Fig. 20.— Same species, fertilized May 26th, 2 a.m. Drawn May 28th, 11.30 a.m. (2 days 

 9i hours) ; no cover-glass. 



Fia. 21. — Same species, fertilized same time as above. Drawn May 29th, 11 a.m. (3 days 

 9 hovars), without cover-glass. 



Fig. 22. — Same species, fertilized same time. Drawn May 29tb, 5 p.m. (3 days 15 

 hours), with cover-glass. 



Fig. 23. — Same species, fertilized same time. Drawn May 29th, 1.30 p.m., with cover- 

 glass. 



Fig. 24. — Same species, fertilized same time. Drawn May 30th, 5 p.m. (4 days 15 

 hours), with cover-glass. 



Fig. 25. — Ovum of Blennius ocellaris adhering to ox-hone. Drawn in living condition, 

 without cover-glass, July 10th, 1888. 



Fig. 26. — Ovum taken in tow-net in Plymouth Sound, February 1st, 1888; no cover- 

 glass. Optical section. Probably Callionymus lyra. 



Fig. 27. — Same ovum, surface view, showing the marking of the vitelline membrane. 



Fig. 28. — Ovum pressed from a ripe female pilchard when the fish was dead. 



Fig. 29. — Ovum of the pilchard at an advanced stage of development, from tow-net 

 August 11th, 1887. 



Fig. 30. — Newly-hatched larva of same species, from an ovum taken in tow-net 

 November 9th, 1887. 



Fig. 31. — Ovum of the sprat, taken in tow-net January 28th, 1888. 



Fig. 32. — Newly-hatched larva of same species, from an ovum taken in tow-net January 

 30th, 1888. 



Fig. 33.— Ovum taken in tow-net February 6th, 1888. Drawn February 9th, 1888. 

 Zeiss 83, oc. 3, camera ; no cover-glass. Identified as Oadus merlangus. 



Fig. 34. — Larva hatched from same kind of ovum on February 8th. Zeiss 83, oc. 3, 

 camera ; no cover-glass. 



Fig. 35. — Gadoid larva hatched from ovum, taken in tow-net January 20th. Pro- 

 bably Gadus luscus. 



Fig. 36. — Ovum tken in tow-net January 28th ; 8-cell stage. 



Fig. 37. — Larva hatched from ovum of same species, collected January 30th. Hatched 

 and drawn, February 2nd, without cover-glass. 



Fig. 38. — Young Motella, 17 mm. long, from tow-net. May 31st. Drawn without the 

 microscope. 



Fig. 39. — Outline sketch of Arnoglossiis laterna. Natural size. February 9th. 



