402 NOTES AND MEMOllANDA. 



only one or two rnnning forward. In the prothalli which 

 produce the vessels neither antheridia nor archegonia were 

 found ; the root-hairs are })roduced on both sides, so that it 

 is difficult to say which is the upper or under side. A very 

 young leaf, formed as an asexual outgrowth in one instance, 

 did not appear to contain any vessels, but a great many hairs 

 proceeded from it, generally 3-celled, and such as commonly 

 occur about the first leaves of the normally developed embryo. 

 On many of the prothalli containing archegonia the leaf was 

 produced before the root. On the prothalli with asexually 

 produced embryos I found the leaf on one side of the pro- 

 thallus and the root on the other, which is never the case 

 with embryos normally produced. James Abbott. 



[It may be well to state how the bibliography of Dr. 

 Farlow's interesting discovery stands at present. His first 

 paper upon the subject was communicated to the American 

 Academy, January 27th of this year, and printed in its 

 ' Proceedings,' pp. 68 — 73. Only separate copies have at 

 present reached this country, and it is, therefore, uncertain 

 if the paper is actually published in America. An inde- 

 pendent communication, without figures, from Dr. Farlow 

 appeared in the ' Botanische Zeitung,' March 20th, p. 180. 

 The paper published in this Journal was revised by the 

 author, and all the figures for the plates were also redrawn 

 by him. Figs. 1, 2, 3, 4, and 8 were different to any that 

 had previously appeared. — Eds.] 



New Work by Prof. Haeckel. — We have received an early 

 copy of Prof. Haeckel's new work published by Engelmann, 

 of Leipzig. It is entitled ' Anthropogenie : Entwickelungs- 

 geschichte des Menschen,' and gives in a popular form the 

 facts of the development of the human ovum and also the 

 zoological facts which bear on the ancestry of man. The 

 work is, in fact, an enlargement with much new matter of 

 the final chapters of the ' History of Creation ' of the same 

 author, now in its fourth edition. The embryologist will 

 find in this work — although addressed to the " laity " — many 

 important and highly suggestive views as to such questions 

 as the homology of the germ-layers, the genital glands, and 

 the primordial kidney. 



