ARRANGEMENT OF MUSEUMS. 205 



It need scarcely be said that as perfect a collection as possible 

 of the plants of the county should be formed. 



The zoological division of our museum finally claims attention, 

 and liere I do not propose to follow exactly any generally-received 

 classification. That of Huxley, in his * Introduction to the Classi- 

 fication of Animals' (1869), would I think be better adapted for 

 our purpose than tlie scheme ho has more recently proposed in the 

 * Journal of tlie Linnean Society.' * This is founded in great 

 measure iipon researches into embryological development by 

 Hacckcl and other continental biologists, but it may be doubted 

 whether it is really an improvement upon his earlier classification, 

 and it is certainly a less practicable classification for the arrange- 

 ment of a museum. The same may, I think, be said of Ray 

 Lankester's recently-proposed classification.! 



In the earlier classification of Huxley the sub-kingdoms are 

 arranged thus : — 



Vertebrata 



Mollusca Annulosa 



Molluscoida Annuloida 



Coelenterata Infusoria 



Protozoa I 



The alterations I would suggest, in accordance with more recent 

 views, relate entirely to the annulose sub-kingdoms, as will be 

 seen in the appended outline sketch (Table III, p. 211), in which 

 the extent of the old sub-kingdoms Annuloida and Annulosa is in- 

 dicated, and also the recent arrangement of the animal kingdom 

 into the two great divisions Protozoa and Metazoa. The Infusoria 

 are not here considered to form a separate sub-kingdom, being 

 included in the Protozoa ; one of the two classes forming the 

 Annuloida — the Echinodermata — ranks as a sub-kingdom ; the 

 other — the Scolecida — forms, Avith the Rotifera and the anar- 

 thropode Annulosa, the sub-kingdom Vermes ; and the arthropode 

 Annulosa form a separate sub -kingdom, the Arthropoda. 



The animal kingdom does not admit of arrangement in a single 

 linear series, nor can the classes of its sub-kingdoms be so arranged 

 preserving their natural affinities. It would not, however, be 

 practicable in a museum to arrange the classes of each sub- 

 kingdom in any but a linear sequence. With the sub-kingdoms 

 the case is different, and it would be an easy matter to preserve 

 to some extent their mutual relations, a double row of show-cases 



5oc.' Zoology, vol. xii, p. 226.— 1875. 

 Micros. Science,' 1877, pp. 441-454. 



* ' Journ. Linn. Soc. 



t ' Quart. Journ. 



j Prof. HiLxley, in proposing to make the Infusoria one of the primary groups 

 of the animal kingdom, said that he entertained some doubts regarding the 

 permanency of the group. The difficulty is to frame a definition of the sub- 

 kingdom Protozoa which shall include the Infusoria and Porifera and exclude 

 the whole of the Vermes. It may also be mentioned that the sponges (Porifera 

 or Spougida) are now considered by some of our highest authorities to be 

 Metazoa, and either to form a separate sub-kingdom, or a class of the Coelenterata 

 below the Hydrozoa. 



