298 BKACHYPHYLLT7M. 



1854. Braehyphyllum mamillare, Morris, Brit. Foss. p. 3. 

 1864. Braehyphyllum mamillare, Leckenby, Quart. Journ. Geol. Soc 

 vol. xx. p. 76. 



Thuites expansus, ibid. 

 1870. Braehyphyllum mamillare, Schimper, Trait, pal. veg. vol. ii. p. 335. 



B. Phillipsi, ibid. p. 336. 



1875. Brachyphyllton mamillare, Phillips, Geol. Yorks. p. 229. 

 Thuites expansus, ibid. p. 229, pi. x. fig. 11, lign. 59. 



1876. ? Echinostrobus (Thuites) expansus, Feistmantel, Pal. Ind. pi. ix. 



figs. 6-9. 



1877. ? Braehyphyllum mamillare, ibid. pi. x. fig. 12 ; pi. xi. figs. 12 and 13. 

 1884. Braehyphyllum mamillare, Saporta, Pal. Fran<j. vol. iii. p. 326, 



pi. clxii. figs. 3-7. 

 1890. Braehyphyllum mamillare, Scbenk, in Zittel, p. 301. 

 1892. Braehyphyllum mamillare, Fox-Strangways, Tab. Foss. p. 137. 



Thuites expansus, ibid. p. 141. 

 1900. Braehyphyllum mamillare, Seward, Manchester Lit. and Phil. Soc. 



vol. xliv. p. 17. 



Type-specimen. The original of pi. clxvii. of Lindley & Hutton 

 is in the Manchester Museum (No. 52). 



In habit the branches of Braehyphyllum mamillare resemble those 

 of Arthrotaxis cupressoides, Don ; the branches of different order are 

 given off at a fairly vide angle. The leaves are small, fleshy, 

 triangular in shape, with a median dorsal keel, crowded and 

 spirally disposed. There is no satisfactory evidence as to the 

 nature of the flowers. 



There has been some confusion on the part of palaeobotanical 

 authors between Braehyphyllum mamillare, Brongn., and Thuites 

 expansus, Sternb. ; the specimens to which Phillips and Lindley & 

 Hutton applied the latter name are undoubtedly identical with 

 those designated by Brongniart Braehyphyllum mamillare. 



The specimen from the Gristhorpe plant-bed, which is figured 

 by Lindley & Hutton as Thuites expansus, is, I have no doubt, 

 specifically identical with the plant which these authors represent 

 in plates clxxxviii. and ccxix. as Braehyphyllum mamillare. The 

 specimen has a length of 9*5 cm., and represents an imperfectly 

 preserved twig, bearing short lateral branches clothed with 

 spirally disposed and fleshy broadly triangular scale-leaves, closely 

 adpressed to the axis. Each leaf terminates in a sharp point, 

 and is traversed on the abaxial surface by a fairly prominent 

 median ridge. 1 



1 Seward (00), p. 18. 



