ZOOLOGY AND BOTANY, MICROSCOPY, ETC." 601 



which is of such value to conchologists. Vittaria lineata forms beard- 

 like clumps on palmettos in Florida, and its long narrow leaves have a 

 simple venation ; there is a single median costa, which gives off lateral 

 veins at intervals. These lateral veins run to the margin, then bend 

 forward parallel to the costa, and each joins up with the vein above it ; 

 thus a single series of areola? is formed along each side of the costa. But 

 the first-formed leaves of V. lineata are still more simple, and have but a 

 single vein or costa. This is exactly the type of venation of Mono- 

 gramme trichoidea, a Philippine species. The later leaves of Vittaria 

 lineata show successively one or two to several areolae. This stage cor- 

 responds to what is found in Antrophyum minimum Baker, which may 

 belong to the genus Hecistopteris J. Smith. Similarly, Antrophyum and 

 Ananthacorus, which have the most complex venation in the tribe, re- 

 capitulate the characters of Monogramme and Hecistopteris. They have 

 several rows of areola? on each side of the costa. The law of recapitula- 

 tion may serve to elucidate the relationships of Phlebodium, Goniophle- 

 bium, and others which have a complicated reticulate venation. 



Hymenophyllum peltatum in Yorkshire.* — W. E. L. Wattam re- 

 cords the discovery of Hymenophyllum peltatum Desv. (H. Wilsoni Hook.), 

 the deflexed filmy fern, at Ingleton, and adds some remarks on its dis- 

 tribution by F. Arnold Lees. It has been recorded from Ingleborough 

 and Dentdale. 



Asplenium Lingelsheimi, a new hybrid.f — W. Seymann publishes 

 some notes on a hybrid fern, Asplenium Adiantum nigrum x Ruta 

 muraria, found on walls on Monte Igueldo, near San Sebastian. He 

 gives its history in literature, and gives it the name Asplenium Lingels- 

 heimi, with two forms — adiantoides and rutoides. 



Two Species of Platycerium.J — H. Christ gives an account and 

 figures of two species of Platycerium. One was described by him in 

 1000 in Warburg's Monsunia as P. sumbawense, and occurs in the 

 islands of Sumbawa and Timor. The other, P. Ridleyi, is a new species 

 carefully described by him, and was collected by H. N. Ridley at Bukit 

 Timah, Singapore, and is said to occur in Borneo and Lingga Island. 

 Christ cites the collector's notes and discusses a question of nomenclature. 

 The new species is allied to P. coronarium, but is smaller and has a 

 remarkable hollow involute cucullate fertile frond, which protects the 

 sorus from drought and rain. The plant grows in inaccessible positions 

 on high trees. 



Varieties of Polypodium vulgare.§ — H. Kingsmill Moore gives an 

 account of some varieties of Polypodium vulgare and of the mode of 

 cultivation which he has found to be best suited to them. Having studied 

 the plants in their natural habitats he attempted to cultivate them. The 

 var. ca.nbricum and others succeeded well in exposed situations, but var. 

 cornubiense would barely exist there. When, however, an attempt was 



* Naturalist, No. 640 (1910) p. 214. 



t Oesterr. Bot. Zeitschr., lx. (1910) pp. 278-80 (figs.). 



X Ann. Jard. Bot. Buitenzorg, 3- Suppl. (1910) pp. 7-12 (2 pis.). 



§ Journ. Roy. Hort. Soc, xxxvi. (1910) pp. 112-14 (4 photos.). 



Oct. 19th, 1910 2 S 



