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Quarterly Journal of Microscopical Science, Vol s2-63, 493-507, Copyright © 1919 by Company of Biologists
1 Professor of Zoology in the University of Cape Town
(1) Phoronopsis has been observed to reproduce asexually by transverse division of the body.
(2) The division occurs in the muscular region of the body.
(8) The detached part is capable of locomotion, and divides a second time below the lophophore, which is thrown off and disintegrates.
(4) The remaining part, after moving about freely, develops an anterior projection (epistome ?), a lophophoral ridge, and later an aboral projection.
(5) The epidermis of the aboral projection is thrown into a number of folds or involutions, by the unfolding of which it somewhat suddenly increases in length at later stages and assumes the form of a peduncle.
(6) The animal then becomes fixed by a mucous secretion at the free end of this peduncle.
(7) The whole process, from first division to pedunculate fixed form, occupied fourteen days.
(8) The peduncle consists externally of a proliferation of the epidermis of the body and internally of modified cells of the c
lomic epithelium, fatty particles and muscular elements.
