XXUl 



Mr. Miers' paper on the affinities of Triuridaceae appears, in abstract, 

 at p. 26, and contains some novel and highly valuable observations 

 on the intimate structure of a tribe of plants whose history he has, at 

 different times, most ably illustrated. 



M. Liebmann's curious and most interesting observations on a female 

 plant of one of the Cycadeae which produced ripe seeds without 

 impregnation, will be found at p. 26. 



Mr. Brown's interesting letter to Captain Sir Francis Beaufort, on 

 the origin and mode of propagation of the Gulf-weed, will be found, 

 in extenso, at p. 28. It is particularly recommended to the attention 

 of botanists. 



Mr. Holdsworth's observations (iv. 30) on dry-rot, as observed in 

 the church of King's Wear, in Devonshire, are extremely curious ; 

 and the idea that a good supply of air accelerated its development is 

 at variance with general opinion. The paper was read before the 

 Linnean Society, and is reprinted from the Proceedings of that body. 



Dr. Lankester's paper (iv. 32) on a peculiar structure of cells on the 

 surface of Callitriche verna, is obtained from the same source. 



Mr. Wilson has two papers on mosses the first (iv. 67), treating of 

 the spirilla, or spermatozoides, and the second {id. 69) on a monstrous 

 specimen of Tortula, described by the late Mr. E. J. Quekett, in the 

 * Transactions of the Microscopical Society,' and noticed also in Lind- 

 ley's ' Vegetable Kingdom.' Mr. Wilson had received an example of 

 the supposed monstrosity, and pronounced it to be Ceratodon purpu- 

 reus, andjnot Tortula, and to possess no anomalies, or even remarkable 

 character. 



Mr. J. Quekett describes (iv. 88), in the report of a meeting of the 

 Microscopical Society, what appeared to him a new fact in vegetable 

 physiology, viz.y the unrolling, in a spiral manner, of the membranous 

 wall of an elongated cell. 



Mr. Benjamin Clarke's paper on the position of carpels, read before 

 the Linnean Society, and subsequently noticed in the Proceedings of 

 that Society, appears in abstract at p. 204, and will be read with great 

 interest by all vegetable'physiologists : it is intituled " Memoir on the 

 position of the Carpels when two and when single, including Outlines 



