128 



Part III. — Tiuenty-seventh Annual Report 



Fig. 27. Egg of Lot Ic. of Herring Spawn, 2nd March 1908 — bp, blastopore, 

 hd. head. 



28. Egg of Lot IIIc. 





3rd' March 1908. 



29. 



He. 





30. 



Ic. 



> > 



5th 



„ . . . . x 



31. 



„ IIIc. 



>> 



> > 



„ . . . . X 



32, 33. 



Ic 



J> 



9th 



> J 



34. 



Ic. 



>> 



11th 



J > 



35. 



„ IIIc. 



>» 





J> 



36. 



Ic. 



> » 



13 th 





37. 



„ IIIc. 



5J 



19th 





38. 



Ic. 



J> 



24th 



,, Dead egg. It has 



white granular masses on its exterior. 

 39-46. Enlarged views of the Organisms 

 patches shown in Fig. 38. 

 Egg of Lot Ic. of Herring Spawn 

 IVb. 

 IVc. 



comprising the white 



47. 



48. 

 49. 

 50. 

 51. 

 52. 

 53. 

 54. 

 55. 

 56. 

 57. 



IVc 2 . 



10th April 1908. 

 29th Feb. 

 5th March ,, 

 11th 



9th April 1908. 

 18th March 1908. 



bp, blastopore. 



Mouth of Larva of Herring just hatched. 



Larva of Herring just hatched, 19th March 1908 . 



Head of Larva just released from the Egg, p. 



Portion of one of the white granular masses shown in Fig. 38. 

 Magnified. 



19 



Letters Used in Plate I. 



b. — blastodisc. 

 bp. — blastopore, 

 cr. — crystal. 



de. — depression between the blasto- 

 disc and the yolk. 



hd. — head. 



ht. — heart. 



i. — inner investment. 



o. — outer , , 



pt.— protoplasm point on periblast. 



