LIXNEAX SOCIETY OF LOXDOX. 47 



seuted a compromise between the two former types. The rio-ht 

 diapophvsis of the ninth vertebra and the left di'apophysis of the 

 eighth were stout and carried the ilia, Mbereas the remaining two 

 diapophyses of these vertebrte were slender. Tlie last specimen, 

 that ot liana temporaria (fig. 4), for which Dr. Eidewood expressed 

 his indebtedness to Dr. AVilley, was more abnormal than the fore- 

 going. The first six vertebrse were normal. The centrum' of the 

 seventh was biconcave. The eighth vertebra was represented by a 

 biconvex centrum without any corresponding neural ai'ch. The 

 ninth vertebra had a centrum Avhich was concave in front, and 

 possessed a right and left convexity behind, as is usual for the 

 ninth vertebra. The left postzygapophysis had failed to develop. 

 The tenth vertebra had no prezygapophysis on the left side. The 

 centrum was possessed of a right and left concavity in front, and, 

 like the diapophyses, was fused with the urostyle behind. The 

 upper part of the neural arch, however, was free from the urostyle. 

 The right ilium was attached to the diapophysis of the tenth 

 vertebra, whereas the left ilium, which was the longer of the two, 

 was borne by that of the ninth. 



February 6th, 1902. 



Dr. D. H. Scott, F.R.S., F.L.S., gave an account (illustrated by 

 lantern-slides) of "An extinct Family of Ferns" — the Botry- 

 ojjttridea:, our knowledge of which is primarily due to the researches 

 of M. Eenault. The vegetative organs and sporangia of the type- 

 genus Botryopteris were described, and two British Palffinzoie 

 species, B. Jiirsuia, AVill., and B. ramosa, AVill., were added to the 

 genus on the ground of their anatomical structure. The genus 

 Z>igopteris, also known with some degree of completeness, was 

 nest dealt «ith, and the structure of the British species Z. Grayi, 

 AVill., described in some detail. Eeasons were given for including 

 other genera, such as Anachoropjteris, Asterochlci^na, and Tmicaulis 

 in the family, while a close connection with DiphJahis and Cory- 

 nepteris was also regarded as probable. The affinities of the group 

 Mere discussed in conclusion, points of agreement with Hymeno- 

 phyllacecT, Osmundacese, Ophioglossacete, and other families of 

 Ferns being pointed out. Heterospory, believed by M. Eenault 

 to exist in Botryopteris and Zyciopteris, was not regarded as 

 established, and affinities were sought rather among homosporous 

 Filices. 



February 20th, 1902. 



Mr. B. Datdox Jacksox, Sec. L.S., in a '• Eeport on the 

 Botanical Publications of the United Kingdom as part of the 

 International Catalogue of Scientific Literature," gave the history 

 of botanic bibliography from the time of Linnaeus, referring to 

 Eeuss's ' Eepertorium,' mentioning the admirable catalogue by 

 Drvander of Sir Joseph Banks's librarv, and passing on to the 

 Eoyal Society's ' Catalogue of Scieutitic Papers,' at present 



