10 EHiETIC SYSTEM. 



by difEerent authors to different things, both Lias and Ehsetic 

 beds having been included in this designation. The term Upper 

 Ehsetic has been suggested as preferable to that of "White Lias 

 for the uppermost beds of the series. 



In Murchison's Geology of Cheltenham,^ an Insect Limestone of 

 Lias age is described as having afforded many remains of insects, 

 ferns, and the leaves " of a new plant belonging to the family 

 Naiadese or some of its allies." The species Naiadita acuminata, 

 founded by Brodie,^ is recorded from an insect limestone of 

 'Lower Lias' age at Wainlode Cliff, Tewkesbury. The term 

 Insect Limestone was applied by Brodie to bands of limestone 

 at the base or near the base of the Lower Lias or at the summit 

 of the Eheetic series. 



In 1850 Mr. J. Buckman' communicated a paper to the 

 Geological Society On some Fossil Plants from the Lower Lias ; 

 his object being to describe the vegetable remains associated 

 with the insects in the 'Lower Lias' beds, and "to distinguish 

 the new forms which have been made out since the publication 

 of the History of Fossil Insects." Buckman gives the following 

 list of plants from strata which he classes as Lower Lias, but 

 which should rather be referred to the Upper Ehsetic series. 



Equisetum Brodiei, Buck., fig. 1.' (Type in the British Museum, No.V. 3358.) 



= Equisetites Muemteri, Stemb. 



Otopteris oitusa, L. & Bi. = Otozamites oitmus (L. & H.). 



0. acuminata, L. & S. — Otozamites aciiminatus (L. & H.). 



Naiadita laneeolata, Brodie, fig. 2 ) r j m ? ? j /u i- ^ 

 .,,_,' . " > =Lycopodites lanceolatus (Brodie). 

 N. petiolata. Buck., fig. 4 ) 



Ctipresstis (?) latifolia. Buck., fig. 5 = ? Fagiophyllmn peregrinum. (L. & H.). 



Eippurites (?), figs. 6 and 7. (V. 3401, Brit. Mus.) ^ 



Umbellifera; (?), Traces of, fig. 8. (V. 3585, Brit. Mus.) } Indeterminable 



ErioacesE (?), Traces of, fig. 9. (V. 3586, Brit. Mus.) ) f^agnieuts. 



The species Otozamites oltusus (L. & H.) is recorded by Brodie 

 from the Insect Limestone of Ashelworth and from Brockeridge ; 

 Oto%am,ites aciiminatus (L. & H.) is also doubtfully recorded bj- 

 the same author. I have not seen specimens of either species 



' Murchison (45), p. 52. 



" Brodie (45), p. 93. 



3 Buckman (60). 



* The figures refen-ed to are given in Buckman' s paper of 1850. 



