CLASSIFICATORY SCIENCES. 633 



" P. 362. Note 5 . For Arachnis read Arachis. The Arachidna of 

 Theophrastus cannot, however, be the Arachis or ground-nut. 



"Pp. 388 and 394. For Harlecamp read Hartecamp. 



" P. 394. For Kerlen read Kalm. 



" P. 394. For Asbech read Osbeck. 



"P. 386. John Ray. Piay was further the author of the present 

 Natural System in its most comprehensive sense. He first divided 

 plants into Flowerless and Flowering ; and the latter into Monocotyle- 

 donous and Dicotyledonous : ' Floriferas dividemus in DicoxYiE- 

 DONES, quarum semina sata binis foliis, seminalibus dictis, quae cotyle- 

 donorum usuni praestant, e terra exeunt, vel in binos saltern lobos 

 dividuntur, quarnvis eos supra terrain foliorum specie non efferant ; et 

 MONOCOTYLEDONES, qusB nee folia bina seminalia efferunt nee lobos 

 binos condunt. Hsec divisio ad arbores etiam extendi potest ; siqui- 

 dein Palmse et congeneres hoc respectu eodem modo a reliquis arbori- 

 bus differunt quo Monocotyledones a reliquis herbis.' 



"P. 408. Endogenous and Exogenous Growth. The exact course 

 of the wood fibres which traverse the stems of both Monocotyledo- 

 nous and Dicotyledonous plants has been only lately discovered. In 

 the Monocotyledons, those fibres are collected in bundles, which follow 

 a very peculiar course : from the base of each leaf they may be fol- 

 lowed downwards and inwards, towards the axis of the trunk, when 

 they form an arch with the convexity to the centre ; and curving out- 

 wards again reach the circumference, where they are lost amongst the 

 previously deposited fibres. The intrusion of the bases of these 

 bundles amongst those already deposited, causes the circumference of 

 the stem to be harder than the centre ; and as all these arcs have a 

 short course (their chords being nearly equal), the trunk does not in- 

 crease in girth, and grows at the apex only. The wood-bundles are 

 here definite. In the Dicotyledonous trunks, the layers of wood run 

 in parallel courses from the base to the top of the trunk, each exter- 

 nally to that last formed, and the trunk increases both in height and 

 girth ; the wood-bundles are here indefinite. 



" With regard to the Cotyledons, though it is often difficult to dis- 

 tinguish * Monocotyledonous Embryo from a Dicotyledonous, they 

 may always be discriminated when germinating. The Cotyledons, 

 when two or more, and primordial leaves (when no Cotyledons are 

 visible) of a Monocotyledon, are alternate ; those of a Dicotyledon 

 are opposite. 



" A further physiological distinction between Monocotyledons and 



J. o * 



