284 Journal of Comparative Neurology. 



cause they are "new." In the lexicon ot Liddell and Scott 

 xotUa iyxtipaXoo is quoted as in good and regular standing among 

 Greek medical writers. According to Burdach ("vomBaue 

 und Leben des Gehirns," 1819-1822, II, 301, 378, 380), Galen 

 designated the "fourth ventricle" as xoiXia omaynoo iyxtipaXoo^ 

 TezapTfj xodia and dnKr^ia xodia ( " De usu partium, " Lib. VIII, 

 C.XII. p. 170) ; the " third ventricle " as iiiarj rpir-q xndia (idem. 

 IX, III, 172); and the "lateral ventricles" as Tzpoaniat xoiUai 

 ( " De odoratus instrumento," II, no). Coclia is then certainly 

 not "new." Had Prof. His sd\A un2tsiial,\\\'s, objection would 

 have been more nearly justified by the facts, although in 

 recent encephalic literature on both sides of the water com- 

 pounds of coelia are more and more frequently encountered. 



§202. In favor of coelia (English celia or celef in place of 

 ventriculus may be urged the following : 



1. Its Greek origin renders it compoundable regularly 

 and euphoniously with the characteristic prefixes already em- 

 ployed in the segmental names, e. g. , mesencephalo7i, etc. 



2. These compounds are mononyms and therefore capa- 

 ble (§47) of inflection, (e. g. , mesocoeliae), derivation (e. g., 

 mesocoeliana), and adoption into other languages without ma- 

 terial change ; e. g. , English, inesocele ; French, vicsocoelie ; 

 German, Mesokblie ; Italian, niesocelia. 



3. The various national paronyms thus formed are like- 

 wise capable of derivation; e. g., inesocelian. 



4. There is classic authority for the use of coelia in the 

 sense of encephalic cavity; §201. 



5. These ancient usages are assumed to be familiar to 

 educated anatomists, who therefore should recognize the com- 

 pounds with little or no hesitation. 



6. The compounds are so euphonious and so obviously 

 correlated with the segmental names as to be learned and re- 



1 As already remarked (W. & G., '89, §80, note), in an' English sentence 

 the word by itself might be either ambiguous or pedantic and the general term 

 cavity commonly answers the purpose ; see §48, and (for the replacement of oe 

 by e) §69. 



