ing the nut. This again is lined with one very delicate membrane, 

 and contains a mass of albumen covered with a second similar mem- 

 brane. A marked analogy is presented to the European botanist by 

 the fruit of the Yew, which has the same integuments though some- 

 what modified ; the outer, fleshy coat in the Yew is however a cup- 

 shaped receptacle, and not drawn up over the nut so as to leave 

 only a small canal at the top, as in Salisburia and Trigonocarpon. 

 The nut also does not adhere to the fleshy cup except below its 

 middle. The internal structure is the same in all three. 



Such are the main facts which I have been able satisfactorily to 

 establish. There are many others yet to be worked out, especially 

 those connected with the individual tissues of which those bodies are 

 composed ; and it is particularly to be borne in mind that the disco- 

 very of some structure indicative of albumen or embryo, is abso- 

 lutely essential to the complete establishment of the affinity I have 

 suggested. 



It must not be overlooked, that the characters through which I have 

 attempted to establish an affinity between Trigonocarpon and Coniferse 

 are equally common to the fruits of Cycadea?; and in connexion with 

 this subject I may remark, that M. Brongniart* has referred the 

 genus Noggerathia, which is also found in the coal-measures, to 

 that natural order, together with some associated organs which are 

 probably Trigonocarpons in a mutilated state. The leaves of Nog- 

 gerathia are, however, alone known, and Dr. Lindley, when figuring 

 those of one species (Lindley and Hutton, Fossil Flora, 28, 29), 

 pointed out their great resemblance to those of Salisburia, thus 

 affording collateral evidence of the view I have been led to adopt 

 from an examination of the fruit alone. 



* Annales des Sciences Naturelles, 2 nd Series, vol. v. p. 52. 



