and Laboratory Methods. 1573 



Microscopical Society, London, and many others. It now numbers its sub- 

 scribers in England, Canada, Japan, Mexico, Germany, Cuba, New Zealand, 

 Brazil, Cape Colony, France, Portugal, Hawaii, Belgium, New South Wales, 

 Bermuda, Sweden, Queensland, Victoria, Costa Rica, Alaska, St. Lucia, Hayti, 

 San Marino, Equador, Jamaica, India, Argentine Republic, Venezuela, Formosa, 

 Chili, Greece, Austria, Servia, Russia, Italy, and Natal, in the order given. 



CURRENT BOTANICAL LITERATURE. 



Charles J. Chamberlain. 



Books for review and separates of papers on botanical subjects should be sent to 



Charles J. Chamberlain, University of Chicago, 



Chicago, 111. 



REVIEWS. 



Arnoldi, W. Beitrage zur Morphologie einiger ^^^ previous papers of this series have 

 Gymnospermen. V. Weitere Untersuchung '■ '■ ^ 



en der Embryogenie in der Familie der already been reviewed in the JOURNAL. 

 Sequoiaceen. Bull, des Nat. de Moscow. '^^6 present paper deals with Scaiwia 

 Pp. 1-28, pis. 7-8, 190 1. f 1 f y 



and other members of the Sequoiaceae, 



viz. : Taxodium, Cryptomeria, Cuiininghamia^ Arthrofaxis, G/yptosirobiis, and 

 Sciadopitys. As might be expected in a paper dealing with so many and such 

 inaccessible genera, the series are often incomplete, but the results are never- 

 theless interesting and important. In Cunninghamia sinensis there are numerous 

 archesporial cells, and several embryo-sacs attain a considerable degree of 

 development. In Sequoia gigantea the endosperm develops uniformly, thus differ- 

 ing decidedly from S. sempervi?'e?is, in which the development at the middle of 

 the endosperm differs from that at both ends. The archegonia occur singly or 

 in groups, but are not so numerous as in S. sempei'virens. There are two neck 

 cells and no ventral canal cell. In Taxodiiim, Cryptomeria and Cunninghamia 

 the archegonia are grouped as in Cupressinese and have a common jacket, but 

 sometimes there is a layer of endosperm between the archegonia. In Sciadopitys 

 the neck is very peculiar, consisting of from four to eight vertically elongated 

 cells. Proteid vacuoles are present in the archegonium and they probably arise 

 from the jacket cells. These vacuoles are not found in any other members of 

 the Sequoiaceae. No ventral canal cell was identified, but it may yet be found. 

 In Cryptomeria the upper end of the egg becomes mucilaginous and sometimes 

 separates from the rest of the o^g^, but no ventral canal is formed. 



In Sequoia sempervirens at the time of fertilization the pollen tube contains 

 two male cells and two free nuclei, one, the nucleus of the pollen tube, and the 

 other the nucleus of a disorganized cell which Belajeff called the sterile cell of 

 the generative complex. No vegetative cell of the male prothallium is formed. 

 The body cell contains starch. In S. gigantea the pollen tube presses between 

 the endosperm and the nucellus. The pollen tubes of Taxodium and Cryptomeria 

 behave as in the Cupressineae. The upper part of the egg becomes mucilaginous 

 and presses upon the neck cells from beneath, while an outgrowth from the pollen 

 tube presses from above and forces its way into the egg. In Seqtwiasejupervirens 



