Lamb, Association of Amencan Anatomists. 49 



Alba ((); cinerea (2); gelatinosa (3); reticularis alba (77); cauda- 

 tum (89); pallidum (loS); albicans (123); entocinerea (143); intercala- 

 tum (144); and arachnoidea (?o8), are neuter or feminine adjectives 

 used as substantives, and comparable in that respect with cases already 

 discussed, viz., callosum (§13) and dura (§15); special points con- 

 nected with them may be considered hereafter. 



Limen (6); caput (90); cauda (91); fimbria (94); splenium (96); 

 genu (97); rostrum (98); corona (no); tuber (124); valvula (148); 

 frenulum (149); lingula (154); arbor (166); calamus (173); ligula (176); 

 pyramis ( 181); conus (189); filum (190); cisternae (209); glomus (217); 

 circulus (231); torcular (251), are more or less closely comparable with 

 calcar, chiasma, tentorium, and falx (§§9-12) in that, even when not 

 absolute idionyms, their signification would be determined by the con- 

 text or could be indicated by a word that need not be repeated. 



In replacing " substantia corticalis " by cortex (105); "nucleus 

 lentiformis " by lenticula (107); " corpus geniculatum " by geniculum 

 (116, 117); " lamina terminalis " by terma (128); "corpus trapezoid- 

 eum " by trapezium (165); "nucleus emboliformis" and "n. globosus" 

 by embolus and globulus (170, 171); "corpus restiforrae " by restis 

 (184); " formatio reticularis" by reticula (206), we simply replace 

 phrases including adjectives that suggest resemblance to objects (simile 

 names) by the substantive names of the objects themselves. In so do- 

 ing we follow the actual example of the B. N. A. in preferring (§6) 

 oliva to " corpus olivare," clava to "processus clavatus," vermis to 

 " processus vermiformis ;" and pyramis to " corpus pyramidale." In- 

 deed, the logical extension of the system embodied in the retention of 

 "corpus restiforme " when restis is available would burden anatomy 

 with gyrus insuliformis, corpus pontiforme, and corpus hippocampoides. 

 none of which, fortunately, has materialized. 



Endyma (4). As well stated by Hyrtl (" Onomatologia," p. 200)' 

 the initial syllable of "ependyma" is quite superfluous. If, on the 

 other hand, the qualifying genitive " ventriculi " is required, as in the 

 B. N. A., why not " cerebri" also in order to secure absolute explicit- 

 ness? As a matter of fact both endyma and "ependyma" are idio- 

 nyms, and the former is as much better as it is shorter. 



Habena (120), valhs (153), andacervus (218) are preferred to the 

 diminutives " habenula, vallecula" and " acervulus " because they are 

 shorter; "acervulus," moreover, is a modern coinage. 



Gyrus subcalcarinus (61) and Gyrus subcollateralis (60). These 

 terms are recommended in place of "Gyrus lingualis " and "Gyrus 

 fusiformis " respectively. The difficulty of applying the latter is well- 



