ABBREVIATIONS 



B.olf., bulbus olfactorius 



C.pr., caudal protrusion 



CbL, cerebellum 



Ch.op., chiasma opticum 



Coll. %., colliculus inferior 



Coll.s., colliculus superior 



C.inf., cornu inferius 



C.par., corpus paraterminale 



C.pin., corpus pineale 



C.str., corpus striatum 



For., foramen interventriculare 



F.plx., fissure for plexus chorioideus 



Hah., habenula 



Hip., hippocampus 



Inc.pc, incisura postcommissuralis 



/., infundibulum 



Is., isthmus 



L.ch., lamina chorioidea epithelialis 



Mes., mesencephalon 



A'^i — Nt, neuromeres 



N.op., nervus opticus 



N^.tr., nervus trigeminus 



Pa7\, parencephalon 



Plx., plexus chorioideus 



R.i., recessus infundibuli 



R.I., recessus lateralis 



R.m., recessus mamillare 



R.np., recessus opticus 



R.pin., recessus pinealis 



R.post., recessus postopticus 



R.sup., recessus suprapinealis 



Rf., rhomboid fold 



S.I., sulcus limitans 



Syn., synencephalon 



T.ch., tela chorioidea 



Th., thalamus 



V.b.olf., ventriculus bulbi olfactorii 



V.I., ventriculus lateralis 



Vel.fr., velum transversum 



V.op., vesicula optica 



PLATE 1 



EXPLANATION OF FIGURES 



4 Wax model of the cerebral ventricles of a 5.1-mm. pig. H.E.C. series 

 1904. X 20 diam. 



5 Cast of the cerebral ventricles of a 12-mm. pig. X 15 diam. 



6 Dissection of the brain of a 12-mm. pig. X 15 diam. 



7 Dissection of the brain of a 12-mm. pig. X 15 diam. The plane of the cut 

 edge of this dissection is indicated by arrows in figure 5. 



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