272 PEOF. A. C. SEWAED AXD ME. E. E. HOLTTUM [vol. Ixxviii, 



We have no doubt of the specific identity of the Tabbowa fossils 

 with those figured by Feistmantel ^ from the Jurassic rocks of the 

 jNIadras coast as JPeco])teris reversa, and we therefore adopt his 

 name in preference to Todites JViUiamsoni, substituting Glado- 

 ])lilel>is for JPecopteris. 



FILICALES IXCERT.E SEDIS. 



Cladophlebis de:nttctjlata Brongniart. (PL XII, figs. 11 «, 

 llh, 12, 14. a, &M5.) 



This designation is used in a comprehensive sense, as standing 

 for a group of fern fronds which cannot (in the sterile condition) 

 be assigned to well-defined species in the stricter sense.- The 

 specimen shown in fig. 12, probably from near the distal end of a 

 pinna, has falcate pinnules, while that reproduced in fig. 11 bears 

 pinnules with more nearh^ parallel sides. The relatively broader 

 pinnules seen in fig. 11 resemble in shape those of fig. 16 ; but the 

 slender axis of the pinna in the smaller impression is a feature 

 more suggestive of Clado'plileljis denticulata than of Todites. In 

 the three specimens, figs. 11, 12, & 14, the laminae are entire and 

 the secondary veins show a single dichotomy (figs. Ylh & 14 5). 

 If larger specimens were available, it might be possible to differ- 

 entiate between the fragmentary pinnae ; but we prefer to include 

 them under the single group-name Cladoplilehis denticulata, which 

 comprises sterile fronds from Jui-assic localities in almost all parts 

 of the world. 



Except in their smaller size, the Ceylon s^^ecimens agree with 

 those figured by Oldham as ^ecopteris indica ^ and later by 

 Eeistmantel as Alethopteris indica from the Rajmahal Hills,^ also 

 with Aletliopteris ichithiensis figured by Eeistmantel from the 

 Jabalpur Group. ^ Two small specimens, figui-ed by Eeistmantel 

 from the Madras coast ^ as Aletliopteris indica, appear to be 

 identical with the Tabbowa impressions. A small specimen figured 

 by Halle fi'om Grraham Land 7 as Cladophlehis sp. is similar to 

 that in fig. 12, and his C. ohlonga from the same locality is 

 indistinguishable froin our examples. It is, however, impossible 

 strictly to differentiate between pinnae of this general type, and, 

 unless fertile pinnules are discovered, we consider that the better 

 ■course is to adopt the comprehensive group-name Cladoplilehis 

 denticulata. 



^ Feistmantel (79) pi. i, fig. 5 ; pi. ii, figs. 1, 2, & 7. 



2 For synonymy, see Seward (00) p. 134. 



^ Oldham & Morris (63) pi. xxvii. 



■* Feistmantel (77) pi. xlvi, figs. 3 & 4. 



^ Feistmantel (77^) pi. ii, figs. 2-7. 



^ Feistmantel (79) pi. i, fig. 1. 



' HaUe (13) pi. ii, fig. 4. 



