438 



ANA TOMICAL TECHNOL OGY. 



p. — Porta. 



pi. — Pia (mater). 



pes. — Postcommissura, as. 



pcu. — Postcornu. Not in the cat. 



pgn. — Postgeniculatum, (Corpus). 



po. ol, — Pero (olfactorius). 



pop. — Postopticus, (Lobus). 



pn. — Pons (Varolii), az. 



ppd. — Postpeduuculus. 



ppf. — Postperforatus, (Locus), as. 



ppx. — Portiplexus. 



pre. — Proccelia. 



prcs. — Praecommissura, as. 



prcii. — Prsecornu. 



preii. — Prosencephalon, az. 



prgn. — Praegeniculatum. 



prpd. — Praepedunculus. 



prpf. — Prseperforatus, (Locus). 



prpx. — 'Proplexus. 



ps. ol. — Pes (olfactorius). 



Ft. d. — Portio depressa (praeperforati). 



Pt. den. — Portio diencephalica (cruris cer- 



ehri). 

 Pt. msen. — Portio mesencephalica (cruris 



cerebri). 

 Pt. p. — Portio prominens (praeperforati). 

 py. — Pyramis. 

 psc. — Pseudoccelia, as. 



q — Quadrans. 



r — Rima. 



R. a. — Recessus aulse, az. 



R. op. — Recessus opticus. 



R.prpn. — Recessus praepoutilis, az. 



Rg. a. — Regio aulica, az. 



rhc. — Rhi nocoel ia. 



rhen. — Rhinencephalon, az. 



rm. — Rostrum, az. 



rp. — Ripa. 



rst. — Restiforme, (Corpus). 



Rx. in. — Radix intermedia. 



Rx. I. — Radix lateralis. 



Rx, mt. — Radix motoria. 



Rx. ms. — Radix mesalis. 



Rx. sn. — Radix sensoria. 



8. — Striatum, (Corpus). 



81. h. — Sulcus habenae. 



81. ic. I. — Sulcus intercruralis lateralis. 



8. ic. ms. — Sulcus intercruralis mesalis, az 



81. li. — Sulcus limitans. 



)8?. trd. — Sulcus triradiatus, az. 



sp. — Splenium, az. 



8pt. lu. — Septum lucidum (cerebri), az. 



str. big. — Stria longitudinalis (callosi). 



t. — Terma, az. 



Tbd. Rol. — Tuberculum Rolandii. 



T. cin. — Tuber ciuereum, as. 



th. — Thalamus. 



Tt. op. — Tractus opticus. 



Tr. prh. — Tractus postrhinalis. 



Tr. rh. — Tractus rhinalis. 



tz. — Trapezium. 



vl. — Velum (interpositum), as. 

 vm. — Vermis, as. 

 vv. — Valvula, as. 



% 1129. Most of the above names are those in common use, with the omission of super- 

 fluous elements like corpus, and the genitives of the names of more comprehensive parts. 

 Most of the apparently new names will be found to be old acquaintances under such thin 

 disguises as translation, transposition, abridgement, and the substitution of prefixes for 

 qualifying words. In a few cases the old names are wholly discarded for briefer new 

 ones (e. g., cimbia for Tractus transversus j)edunculi). Most of the new names, however, 

 refer to parts apparently unobserved hitherto (e. g., crista, carina, delta), or to parts which 

 — although probably observed — seem not to have been regarded as needing a special 

 designation (e. g., aula, quadrans, pero). 



For the names of the segments, coeliae, telse and plexuses, see § 1063i 



So much of each name as immediately follows the abbreviation is regarded as a suffi- 

 cient designation of the part under ordinary circumstances ; sometimes it may be necessary 

 to add the words in parenthesis. 



The names are tabulated according to segments in § 1138. 



