192 CHAKOPHTTA Or THE LOWEE HEADO^ BEDS. [vol. Ixxvii, 



Figs. 7 & 8. Chara cselata, Tar. hicincta nov. (See p. 184.) 



9 & 10. C. cselata. var. haccata nov. 

 Fig. 11. Oospore of Chara Wrightii (?J. (See p. 1S4.) 

 Figs. 12-15. Chara vasiformis. sp. nov. (See p. 185.) 



Plate V. 



Figs. 1-3. Chara tornata. sp. nov. (See p. 187.) 

 Fig. 4. Chara suhcyJindrica. sp. nov. (See p. 187.) 



5. C. siihcylindrica (?J. 



6. Chara distorta, sp. nov. (See p. ]86.) 



Figs. 7 & 8. Chara strohUocarpa, sp. nov. (See p. 1S7.) 

 Fig. 9. Chara polita. sp. nov. (See p. 187.) 



10. Chara strohUocarpa. var. eUii^soidea nov. (See p. 1S8 ) 



11. Chara helicteres Brongniart. (See p. 186.) 



12. Chara p)oT.ita. sp. nov. (See p. 187.) 



13. Chara st7-ohUocarp>a. var. hitruncata nov. (See p. 188.) 



Plate YI. 



Fig. 1. Chara turhinata, sp. nov. (See p. 188.) 



Figs. 2 & 3. ToJypella headonensis. sp. nov. (See p. 188.) 



Fig. 4. Tolypella parvida. sp. nov. (See p. 188.) 



5. T. jxrrvula (?J. 

 Figs. 6-8. Chara spp. (r). 



Fig. 9. Perforated oogonium of Chara cselata (?J X40. 

 Figs. 10 & 11. Portions of brancUets, Type A. (See p. 189.) 

 Fig. 12. Portions of stem, Type A. 



13. Section of stem. Type B. (See p. 190.) 



14. Section of stem. Type C. (See p. 190.) 



Figs. 15 & 16. Portions of cortex. T3-pe D. (See p. 190.) 

 ^ 17 & 18. Portions of stem, Type E. (See p. 190.) 

 19 k 20. Stem-nodes (r). (See p. 190.) 

 Fig. 21. Stem-node, vdth portions of stem-inteinode. and bases of branchlets. 

 X27. 



Discrssiox. 



Dr. M. C. Stopes eongTatiilated the Authors Avannly upon their 

 work; which setmed to he the kind of palseobotanical work much 

 to be desired at present. She remarked on the exceptional nature 

 of the Charace^ in depending so greatly on huge single cells for 

 their external and visible morphological featui-es, and suggested 

 that the dearth of C/^<7;*(7 -remain sin the blackened and carbonaceous 

 layers might be due to the solution of their native carbonates prior 

 to fossilization in Avater with excess of carbon dioxide. She asked 

 whether in the well-preserved fruits the carbonates were replaced by 

 silicates to any extent, and whether the ncAv bossed and ornamented 

 forms of fruits could be conijJared at all with the skeletal or shell 

 enlars'ements of certain races of animals arising some time before 

 extinction. 



Mr. J. Geotes expressed his regret at the unavoidable absence 

 of Mr. Clement Keid. He thanked Dr. Stopes for her remarks, and 

 in reply to her Cjuestions, he stated that he did not find any 

 appreciable trace of silicates in the fossil fruits, which dissolved 

 almost entirely when treated with acid ; he also stated his opinion 

 that the pronounced ornamentation of the Characese could not be 

 regarded as a phase of deYelopment that preceded extinction. He 

 thanked the Fellows for their reception of the paper. 



