196 



BOTA^fICAL GAZETTE 



[march 



tubes, which penetrated the sporangium wall and ran over to the gnat. 

 In twenty-four hours after the gnat was reached, sporangia were beginning 

 to discharge in the new culture. In another case when infection was made 



Fig. I 



xwo empuea zoosporan 

 main hj-pha, X75.- 



FiG. 2. 



Immature oogonia on a 

 ■Fig. 3. Typical oogonium wth three oospores; antheridium 

 below and branched fertilizing tube arising from the partition. X335 — FiG. 4- ob- 

 long oogOTium with antheridium. X 335.— Fig. 5. Intercalar}' oogonium, wtbout 

 an antheridium. X 335.— Fig. 6. Two short-stalked oogonia, with antheridia extend- 

 mg into main h^^ba. X335. 



with a hypha bearing some young oogonia, the gnat was penetrated by 

 a hypha which arose from the stalk of one of the oogonia; not until forty- 



two hours later was the new grow 

 J. D. Pemberxon, C ha Pel HilL A" i 



■W. C. CoKER and 



ON THE ORIGIN OF ANGIOSPERMS^ 

 In an extensive paper to be published during 1908, I have reached the 

 following conclusions concerning the origin of angiosperms: 



T^t ^/^^^.^^^ Pap» l^d gone to press, it appeared in German) in Ber. Deutsch. 

 I • y^^7' ^5:496, 4Q7. igo7. The editors were not a^^-are that it had been sent 

 elsewhere for publication, and regret the unnecessary duph-cation.— Ei>s. 



