4 
MEM. M. @. Z., IX. No. 3.—ACALEPHS, POLYPS. 45 
35, 36. Edwardsia? (Kalliphobe appendiculata Busch.) From Wilhelm Busch, Beobachtungen iiber Anatomie, 
ete. (cited above), pp. 130-132, Taf. XIV. figs. 8,10. Magnified about 100 diam. 
35. Larva with oral end down. Into the geneval cavity two club-shaped organs (m nt. fil. ?) project. At the aboral 
pole there is a tuft of cilia, half as long as the body, which is only partially represented in this figure. 
36. The same larva as that last figured with the club-shaped organs protruded through the mouth. The latter are 
ciliate, and armed with nettle-cells like the ectoderm. 
37-43. Alcyonium digitatum Lam. From A. 0. Kowalevsky, Observations on the Development of Ccelenterata 
(cited above). pp. 16-23. Taf. IV B. and V. 
Nore. — Three of the earliest stages are figured at the bottom of Plate XII. figs. 57-59. 
87. The central, as well as the outer, layer has broken up into nucleated cells. 
38. The larva is already formed. The limits of the inner cells and their nuclei are only very indistinctly visible. 
39. (Erroneously numbered 30.) An advanced stage of a free swimming larva. The entodermic cavity is nearly 
filled with yolk substance (v/.), containing at one pole transparent vacuoles. 
40. A larva which has become attached. 
41. Around the infolding which was formed at the upper end there have grown out eight rounded protuber- 
ances. 
42. A cross section of the preceding stage, showing the pharyngeal sac (phx.), the continuous layer of sub-ecto- 
dermie cells, —the middle layer (msd.), —and the walls of the mesenteries surrounding still persistent 
masses of yolk. 
43. Cross section of a more advanced stage than the preceding. The remnant of the yolk (zt.) lines the inner 
surface of the éntoderm, and the mesoderm (msd.) is composed of a double layer of spindle-shaped cells, 
The membrana propria is seen between the entodermic walls of the meseuteries. 
