CLASSIFICATION. 387 



f Tracheata (Peripatus, Myriapods, Insects). 



te 



[ Pycnogonida. 

 &quot;(14) Mollusca. 



&quot;(15) Polyzoa (Including Phoronis). 

 &quot;(10) Bruchiopoda. 

 &quot; (17) Chordata (Includes Balanoglossus and Tunicates. Some 



continental zoologists do not admit Balanoglossus).&quot; 

 [This last phylum of couiee includes the Vertebrata.} 



Though under present conditions, as above implied, it 

 would be absurd to attempt a definite scheme of relation 

 ships, yet it has seemed to me that the adumbration of a 

 scheme, presenting in a vague way such relationships as are 

 generally agreed upon and leaving others indeterminate, may 

 be ventured; and that a general impression hence resulting 

 may be useful. On the adjacent page I have tried to make 

 a tentative arrangement of this kind. 



At the bottom of the table I have placed together, under 

 the name &quot; Compound Protozoa,&quot; those kinds of aggregated 

 Protozoa which show no differentiations among the members 

 of groups, and are thus distinguished from Metazoa; and I 

 have further marked the distinction by their position, which 

 implies that from them no evolution of higher types has taken 

 place. Respecting the naming of the sub-kingdoms, phyla, 

 classes, orders, &c., I have not maintained entire consistency. 

 The relative values of groups cannot be typographically ex 

 pressed in a small space with a limited variety of letters. 

 The sizes of the letters mark the classificatory ranks, and 

 by the thickness I have rudely indicated their zoological im 

 portance. In fixing the order of subordination of groups 

 I have been aided by the table of contents prefixed to Mr. 

 Adam Sedgwick s Student s Text Book of Zoology and have 

 also made use of Prof. Ray Lankester s classifications of 

 several sub-kingdoms. 



Let me again emphasize the fact that the relationships of 

 these diverging and re-diverging groups cannot be expressed 



