BY F. RATTE, ING. DES ARTS ET MANUF., PARIS. 



1079 



be due to a mistake in recording them, by reason of the divisions 

 covering each other. Then at a distance of four centimetres more 

 or less from the centre, a secondary sub-division occurs, and each 

 of the rays thus formed is again divided at an average distance of 

 from five to eleven centimetres from the centre, the average sub- 

 division taking place at seven or eight centimetres. Each of these 

 sub-divided rays is obtuse, rounded or digitiform at the apex. 

 They are not as a rule equal, but their length follows the general 

 outline of the frond. Some of the principal rays, however, 

 (apparently the fifth and the ninth) seem to have their divisions 

 shorter (the ninth evidently), than the proximal ones. The 

 principal sub-divisions are not all regularly dichotomous, but those 

 in the middle (apparently from the fourth to the eighth from the 

 left) have some of their ultimate divisions in three instead of two 

 parts, and this slightly changes the form of the apex, which is 

 sometimes narrower, less obtuse, and bent or slightly incurved on 

 one side. The width of the ultimate ordinary sub-divisions is from 

 4i to 10 millimetres, and in the secondary rays which have three 

 sub-divisions, they are still narrower, being from 3 to 5 millimetres. 

 The following table will give as far as possible the measurements 

 and number of divisions, the principal rays being numbered as 

 before from the left, from 1 to 12 : — 



(1) There seem to be here, only five instead of six ultimate sub-divisions. 



