THREE SPECIAL CASES OF FERN HYBRIDS: 



a military defence area forbidden to foreigners. At my request, however, Professor Halle 

 of Stockholms Riksmuseet very kindly undertook to send out two members of the museum 

 staff (G. Haglund and R. Rydberg), who visited the island on my behalf and brought back 

 a very large and varied collection of living plants. A selection of these was dispatched by 



f 



» 



Fig. 153. Meiosis in hybrid Woodsia, permanent acetocarmine preparations, a. Anaphase of first 

 meiotic division from the leaf of Fig. 1 52 Z>, showing lagging univalents, x 1000. b. Anaphase of 

 second meiotic division showing lagging halves of univalents, from the leaf of Fig. 152 c. x 1000. 

 c. First meiotic metaphase from the leaf of Fig. I52</. x 1500. For explanatory diagram see Fig. 154. 



air to Kew where they throve amazingly, and one month after arrival there, namely, at 

 the end of August 1948, a new crop of fronds had been put up on every one, from which 

 fixations and the following information were obtained. 



Fig. 152 shows the range of leaves represented in this collection. If comparison is 

 made with Fig, 107, p. no, it will be clear that the leaf of Fig. 152 a is most hke that of 



148 



