oa 
Ereeces fos its births, embracing under this quality, 2 oe = 
332 Dana on the Classification of Animals 
Descending. Ascending. 
A. Size of re ema - Potential. 1. Potential. 
B, Fun neti ional, Retroferent. . Preferent. 
© Defunctionative. 4 Perfunctionative. 
Amplificative. Concentrative. 
4, 
5; 
Multiplicative. 6. Limitative. 
7 : 
8. 
C. Incremental, - - 
és a 
Analytic 
D. Structural, - - - - 
vs Simplificative 
See eS rs Pe 
co 
— 
ky 
= 
ca 
e 2 
N 
iS} 
Q 
ee ee -. « 10. Holozoic. 
E. Postural,- - - - - 11. Postural. 11. Postural. 
bg Embryological, - - 12. Prematurative. 12. Permaturative. 
The remaining terms fall into both colum 
ith ascending grade, the changes are mostly concentrative ; 
with Welandtoag, they are diffusive or decentrati 
2. Adkiitional Phelan 
ence expresse ina structure frachen ay Sarai aft and dorso- 
ventral polarity; (2) a head at the forward extremity ae 
the seats or organs of the senses, as well as the mouth and mo 
organs; and (8) the power of locomotion, if not also limbs for 
rpose. Consequently Radiates, as they fail in the first 
criterion, are not within type-limits; neither are any @ 2 
species of aaa tog only in a partial degree species without - 
limbs for locom : 
Again, the Vertabiniutyie in addition to having the charac 
teristics of the animal type and the vertebrate structure, is essen- 5 
tially terrestrial, and, therefore, the requisite limbs and structure 
for terrestrial life are in the type-idea. Fishes are ere a 
outside of type-limits, or are degradational species. 
The Mammal-type, ‘the highest under Vertebrates, in addition 
to the characteristics of the Vertebrate type, has that of 
> by placental nutrition seers aos, Be 
