. Journal of morphology . .?>-? 4 7 48 49 50 ^^ 52 53. The Journal of MoiiPHOLOGY.—Vol. XX, No. 3 Plate IV. 58. Central aster of the first maturation figure, showiug archiplasmicdifferentiation of the rays. X 2000. 59. Sperm-aster in tlie nuclear area. In the next section is found thefirst maturation figure. X 860. 60. Kays of the maturation aster reaching chromatin masses, x ^^^^^*- 01. JNlitotic figure in an ether egg of Asterias, in which, one of the astershas divided into two. X 526. 62. Sperm-asters approaching the first maturation figure. Some of thechromosomes are attracted towards t
. Journal of morphology . .?>-? 4 7 48 49 50 ^^ 52 53. The Journal of MoiiPHOLOGY.—Vol. XX, No. 3 Plate IV. 58. Central aster of the first maturation figure, showiug archiplasmicdifferentiation of the rays. X 2000. 59. Sperm-aster in tlie nuclear area. In the next section is found thefirst maturation figure. X 860. 60. Kays of the maturation aster reaching chromatin masses, x ^^^^^*- 01. JNlitotic figure in an ether egg of Asterias, in which, one of the astershas divided into two. X 526. 62. Sperm-asters approaching the first maturation figure. Some of thechromosomes are attracted towards the sperm asters. X 806. 63. Two cytasters in an ether egg of Asterias. X 1566. 64. Two asters in an enucleated blastomere of an ether egg of 1566. 05. Two asters connected by a spindle in an enucleated blastomere ofan ether egg of Asterias. X 860. 06. Spindle formed between the cenlral aster of the first maturationfigure and the sperm-aster, x 800. 07. Spindle formed between two sperm-asters in a dispermic egg. X 800. 08. Sperm-nucleus appr
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