THE SUBDECORATA-STOCK. 357 
The subdecorata-stock. 
Four dwarf forms, which appear to illustrate retrogressive development and 
earlier inheritance in a very striking manner, are included in this series; they 
may be distinguished from one another thus : 
S. subspinosa, spinous and spinicostate. 
S. decorata, spinicostate and nodicostate. 
S. subdecorata, spinicostate and costate. 
S. decora, costate. 
In a recent paper’ Mr. F. A. Bather, F.G.S., and myself have proposed a series 
1 Nodicoste differ from bullicoste in having less elongate protuberances—often because the 
“nodi” are truncate on the outside. The “nodi” may be not unlike pimples—nearly round. Like 
bullicostz, the nodicostz are a degenerate form of spined rib (spinicoste), and the “ nodi’’ mark a phase 
of decadence between spines and no spines. 
2“The Terms of Auxology,” by S. S. Buckman, F.G.S., and F. A. Bather, M.A., F.G.S. 
(‘Zoologischer Anzeiger,’ Nos. 405-6, p. 420, November, 1892). We pointed out the etymological 
objections to the biological terms proposed by Prof. Hyatt, and used by American and other authors ; 
but, fully recognising the great value of some such terms, we suggested the series shown in the 
following table—the life of an individual being divided into six stages, as in Hyatt’s scheme. 
Further we remarked that the stages of phylogeny could be designated in the same manner by 
the prefix of “phylo-” and that the stages, during phylogenetic history, of the growth and decline 
of a character (morphogenesis) could be distinguished by the same terms with “ morpho-” as a prefix. 
The table below also gives Haeckel’s physiological terms for growth, perfection, and decline in ontogeny 
and in phylogeny. 
Ontogeny. Phylogeny. 
Embryonic Phylembryonic 
Anaplasis | Bret Phylobrephic Epacme. 
Neanic? Phyloneanic 
Metaplasis Ephebic* Phylephebic Acme. 
Gerontic* Phylogerontic 
Cataplasis | Catabatic® Phylocatabatic ! Paracme. 
Hypostrophic® Phylhypostrophic 
It should be noted that the gerontic stage is subdivided into two; namely, Catabatic, ‘“ the 
period of decline,” and Hypostrophic, the stage of atavic senility—the stage when prolonged decline 
causes pronounced reversion. No words in our language really give expression to these phenomena. 
In regard to “ Epacme,” &c., it should be noted that these terms refer, properly, to number of species, 
and to individual size and predominance: by many writers, however, they have been used in relation 
to phylogenetic development, obviously for want of the very terms we proposed. In regard to the 
application of our terms to Ammonites, attention may be called to “ Etudes sur les Ammonites des 
Etages moyens,” par Emile Haug (‘ Bull. Soe. géol. France,’ 8e série, t. xx, p. 301, &c.); where, 
however, it appears that the distinction between ontogenetic and phylogenetic stages is not quite 
maintained. 
' Bpegixds, belonging to the unborn or new-born young. * Neavxds, adolescent. *° ’Eqnfixés, 
adult. + Depovrixds, senile. © KaraBartxds, affording an easy descent. °® “Yzoorpogy, a recurrence or 
relapse. 
