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Biol Bull 54: 279-288. (April 1928)
© 1928 Marine Biological Laboratory
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GRAFTING AND REINCORPORATION IN ACTINOSPHÆRIUM EICHHORNII EHR

RUTH B. HOWLAND 1

1 WASHINGTON SQUARE COLLEGE, NEW YORK CITY

Grafting.

1. Merotomized portions of Actinosphoeligrium eichhornii may be grafted together under slight compression.

2. Fusion occurs between two medullary, or between medullary and cortical surfaces.

3. Grafted animals regain a spherical shape, and show no sign of separation at the end of four days.

Reincorporation of Axopodia.

1. Axopodia completely severed from the protoplasmic mass may be reincorporated, either by the same or by another animal.

2. Severed axopodia often become vacuolated, and develop long pseudopodia.

3. Reincorporation may occur at either the tip or the sides of unsevered axopodia, or on the cortical surface of the main body.

4. Severed axopodia which have not been reincorporated at the end of 40 to 50 minutes, round up, become quiescent, and show signs of disintegration.

5. Motionless axopodial fragments are not incorporated.






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Copyright © 1928 by the Marine Biological Laboratory.