Wilder.] 184 [April 5, 



symmetry, Coues, 70, 150, (1870). — Super o-inferior symmetry, Coues, 

 70, 150, (1870.) — Correlated serial secondary actinology, Miv., 278, 

 120, (1870). — Vertical symmetry, Miv., 279, 165, (1871). — Intrinsic 

 bilateral symmetry (of membra) , Fols., 40, (V), 1 (1864). — Antitropy, 

 (?) (with Radiates), Ag., 200, 3, 260. 



Definition. The apparently antitropic relation between parts 

 which are telically opposed t'o each other, but lie upon the same side 

 of a structural plane. 



Examples. Of vertical pseudantitropy, the dorsal and haemal arches 

 and the dorsal and anal fins; of longitudinal pseudantitropy, corre- 

 sponding maxillary and mandibular teeth ; the anterior and posteror 

 ends of the sternum in many quadrupeds; the prearmal and post- 

 armal borders of manus (as of Chelydra serpentina, Flow., 71, 253); 

 of lateral pseudantitropy, the inner and outer canthi of the eye ; the 

 opposite sides of an apparently bilateral radiate, (Ag., 200, 3, wood- 

 cuts 88-91), 



Remark. The question involved here has been indicated under 

 hypsesyntropy and spherical homology. No doubt it will appear to 

 many that it is a question of words rather than of facts; but until I 

 am convinced that ideas are not embodied in material forms, I shall 

 aim to at least show what confusion we are now in respecting the 

 nomenclature of both the ideas and the forms. 



Antitropy. 



Homologie symmetrique, Foltz, 39, 51, (1863). — Symmetric, Flour., 

 228, fere, (1844).— Duplicity, Ok., 285, Par. 78, (1810).— Polarity, 

 Ok., 285, Par. 76.(1810).— Antitropy (?), Schimper and Braun, (?)•— 

 Symmetry, Ok., 285, Par. 2096, (1810). — Respective symmetry, Archi- 

 tecture. — Antitropic relation, (?), Ag., 200, 3, 260, (1860). — Lateral- 

 ity, Ag., (Rem. on), 298, 279, (1861). — Anatomical symmetry, Fols., 

 40 (?), (1864).— Antitypy, Wild., 45, 15, (1865).— Polar homology, 

 Wild., 45, 14, (1865). — Opposition oder Spiegelwilde, Pagens., 54, 

 162, (1867).— Polar antitypy, Coues, 70, 372, (1870).— Reversed 

 repetition, 2 Coues, 70, 152, (1870). — General antagonism, ib., 193.— 

 Antitypical correlation, ib., 222. — Repetitive homology, ib., 398. — Oppo- 

 site reversed repetition, ib., 149. — Symmetrical repetition, ib., 149. — True 

 symmetrical antagonism, ib., 149. 



1 Here, as generally elsewhere, when an interrogation point stands for the num- 

 ber of the page, it is because I have only manuscript copies of the papers referred 

 to. 



2 These are rather definitions than real synonyms. 



