128 BIOLOGICAL LECTURES. 



(i) That the adjectives dorsal and ventral be employed 

 in place of posterior and anterior as commonly used in human 

 anatomy, and in place of upper and loiver as sometimes used in 

 comparative anaftomy. 



(2) That the cornua of the spinal cord and the spinal nerve- 

 roots be desio:nated as dorsal and ventral rather than as 

 posterior and anterior. 



(3) That the costiferous vertebrae be called thoracic rather 

 than dorsal. 



(4) That, other things being equal, mononyms (single-word 

 terms) be preferred to po/yonyins (terms consisting of two or 

 more words). 



(5) That the Jiippocavipus minor be called calcar; the hip- 

 pocampus major, hippocampus; the pons Varolii, pons; the 

 insula Reilii, insula; pia mater and dura mater, respectively, 

 piA and DURA. 



(6) That the following be employed rather than their vari- 

 ous synonyms : hypophysis, epiphysis (for conarinm and corpus 

 pineale), chiasma, oblongata, lemniscus, monticulus, teg- 

 mentum, PULVINAR, FALX, TENTORIUM, THALAMUS, CALLOSUM, 

 STRIATUM, DENTATUM, MESENCEPHALON, PALLIUM, OLIVA, CLAVA, 

 OPERCULUM, FISSURA CENTRALIS (for/. Rolatldo, Ctc), F. CALCA- 

 RINA, F. COLLATERALIS, F. HIPPOCAMPI, CUNEUS, PRAECUNEUS, 

 CLAUSTRUM, FORNIX, INFUNDIBULUM, VERMIS. 



Sections i, 2, 3, and 5 constituted the " Preliminary Report 

 of the Committee on Anatomical Nomenclature" of the Asso- 

 ciation of American Anatomists, which was adopted unanimously 

 by that body Dec. 27, 1889.^ 



Section 4 is substantially identical with the second para- 

 graph of the " Second Preliminary Report " of the same 



1 The members of the committee at that time were Joseph Leidy, M.D., LL.D., 

 professor of anatomy in the University of Pennsylvania, president; Harrison 

 Allen, M.D., formerly professor of physiology in the University of Pennsylvania; 

 Frank Baker, M.D., professor of anatomy in the Medical Department of George- 

 town University; Thomas B. Stowell, Ph.D., principal of the Potsdam (N.Y.) 

 Normal School ; and B. G. Wilder, secretary. To the committee, at the meeting, 

 was added Thomas Dwight, M.D., professor of anatomy in the Harvard Medical 

 School. The report was published in the History and Records of the Association 

 for 1SS8, 1889, 1890, p. 5. 



