PHANEROGAMS. 



527 



Wealden, but according to Dr Feistmantel also represented in the 

 Lias and the Lower Gondwanas of India. Ptilophyttum (fig. 1395) is 

 a genus characteristic of the Upper Gondwanas, having long narrow 

 leaves, with alternating leaflets which are likewise long and narrow, 

 and are attached to the front of the stem, with upwardly-directed 

 terminal points, and a simple venation. Otozamites (fig. 1396), 



Fig. 1395.— Part of leaf of Ptilophyttum cuchense', 

 from the Upper Gondwanas of India. (After Feist- 

 mantel.) 



Fig. 1396. — Part of leaf of Otozamites 

 bengalcnsis ; from the Lower Gondwanas 

 of India. (After Feistmantel.) 



according to the last-named writer, is allied to Ptilophyttum, but dis- 

 tinguished by the lower basal angle of the leaflets, which in the latter 

 is affixed and decurrent on the stem, becoming free and rounded like 

 the upper one ; the disposition of the veins being very similar in 

 both genera. In Europe this genus occurs very abundantly from 

 the Rhcetic to the Upper Jurassic, is well represented in the Cach 

 stage of the Upper Gondwanas of India, and also occurs in the 

 Rhaetic of Honduras. Ctenophylliwi is an allied genus typically 

 from the Upper Lias and Lower Jurassic of Europe. An important 

 genus is Pterophyllum, in which Dr Feistmantel includes Anomo- 

 zamites of Schimper, occurring in Europe from the Carboniferous 

 to the Upper Jurassic and Wealden, in India from the higher 

 stage of the Lower Gondwanas to the two lower divisions of the 

 Upper Gondwanas, and also recorded from the reputed Trias of 

 New Zealand. The leaves are stalked, of moderate size, and 

 considerable width ; while the leaflets are generally opposite, articu- 

 lating at right angles with the sides of the stem, and having numerous 

 veins. Ptilozamites is an allied type from the Rhcetic of the Con- 

 tinent. JVilssonia, of the Rhaetic and Lower Jurassic of Europe, 

 is readily distinguished by its leaves being either strap-like and 

 undivided, or with slight segmentation. Sphenozamites from the 

 French Jurassic and the Rhcetic of Honduras, and Macropterygimn 

 from the Keuper of Carinthia, are imperfectly known forms which 

 may be allied to Nozggerathia noticed below. Dirty ozamites is a 

 peculiar form from the Upper Gondwanas characterised by the 

 leaves having a net-like venation, as in the genus Glossopteris (fig. 

 1376) among the Ferns, and is regarded by Dr Feistmantel as the 

 type of a distinct family. Another type is presented by the genus 

 vol. 11. 2 s 



