THE JOURNAL OF PHARMACOLOGY. 



189 



In this table the names of the families are printed in the order of their 

 occurrence in the Pflanzenfamilien. When the composition of the family- 

 is the same in both books the number of genera which it is accorded in the 

 Pflanzenfamilien is indicated in the third column of figures, that of the 

 genera in the fifth and last column. In the second column the consecutive 

 numbers, as per Engler and Prantl, are printed, and in the fourth column 

 of figures its position in the Benthamian sequence is indicated by figure. 

 As the two works start at opposite ends of the series, it was necessary to 

 reverse the order of numbering for the Genera Plantarum. Even this 

 change does not give numbers which could be rationally contrasted with 

 those in the second column, because one of the former is often the equiva- 

 lent of several in the latter. Another column is therefore provided at the 

 extreme left which constitutes the equivalent of the corresponding family 

 of the Genera. It is therefore clear that by comparing a number of the 

 first with the corresponding one of the fourth column of figures we can 

 judge of the position of a family in the two works. Thus, the thirty-fifth 

 family of Bentham and Hooker is the first by Engler and Prantl. The 

 first of the former becomes the tenth of the latter in point of order, 

 though numbered the twentieth, owing to subdivision of the preceding 

 families. Various conditions prevented this comparison from being made 

 absolutely accurate, but it is sufficiently near it for all practical purposes. 



When Messrs. Engler and Prantl, in dividing up a family, have kept its 

 component parts together a brace pointing to the corresponding Bentha- 

 mian number and another at the left pointing to the relative Englerian 

 number indicate the fact. When the component parts are separated, a 

 parenthetical note follows, referring the reader to the number or numbers 

 of the second column, where the complementary part or parts may be 

 found. In such cases the abbreviation pp. (t>ro parte) will be found after 

 the serial number, per Bentham and Hooker, of the fourth column. 



