Wilder, Neural Tenns. 325 



V, B, 36, Stratum cinereian. — Why not (in the German 

 list) st7'atiim griscum, in accordance with the word employed 

 among the " Termini generales ?" see §36. 



VI, I, Metepicoelia ox " ventriculus quartus. " — The divis- 

 ion of this continuous cavity into regions corresponding with 

 the two recognized segments (V, i and VI, 26) must be con- 

 sidered upon another occasion (§250). 



VI, 25, Medulla oblongata. — According to the German 

 committee this is coextensive with their myelencephalic segment 

 (my metencephalon), and the ventral portion of the segment 

 next cephalad (their metencephalon, my epencephalon) is con- 

 stituted by the pons. But the pons exists only in mammals ; 

 hence in the other vertebrates the cerebellar " roof" would be 

 unsupported by a "floor;" see V, 2, praeoblongata. 



VI, 30, Pyramis. — The replacement of corpus pyraviidale 

 and of processus clavatus (40) by pyramis and clava respectively 

 was urged by Spitzka fifteen years ago ('81, a). 



VI, B, 15, Nucleus olivaris accessoinus dorsalis. — \{ dors alls 

 be appropriate here, why not in several other cases where pos- 

 terior is employed by the German committee ? 



§242. VII, Myclon. — Respecting the substitution of this 

 mononym for the dionym niedidla spinalis, which was proposed 

 by Owen just half a century ago, see §51. Owen also con- 

 sistently, although I think unwisely, employed the compound, 

 myelencephaloii, for axis cerebro spina lis. Huxley applied it to 

 the last encephalic segment, and this misappropriation is 

 sanctioned by the German committee. Reserving comments 

 upon these points for another occasion (^250), I now claim that 

 the sole justification for the use of DiyelencepJialon is the adop- 

 tion of niyelon in the Owenian sense. 



VIII, 32, Accj'vus. — This word, signifying a heap, occurs 

 in Andrews and Stoddard's lexicon. The diminutive, acovulus, 

 is longer, needless and of modern origin. 



IX, Bloodvessels. — As admitted by me in 1884 ('84, e) 

 and restated in §§163 and 172, absolute mononymy is unattain- 

 able Avith large groups of organs, e. g., muscles, fissures and 

 vessels. Hence, excepting with circuliis (A, 9) and torcular 

 {C, 8), with the single word adjectives in this category must be 

 understood arteria, sinus or vena ; and when there is any danger 

 of ambiguity the substantive or its abbreviation should be 

 employed. 



