. The journal of mental pathology. AROCCIPITAL.—Spitzka. 31 and about the exoccipital fissure. I. is the paroccipital gyrus, or premierpli de passage; II. is the deuxieme pli; III. is the parietal lobe; IV. is theoccipital lobe. Fig. 6. Schematic arrangement of the fissures as they are represented inthe adult human brain. Fig. 7. Class I., left continuity and right separation of the parietal andparoccipital fissures. Present in 2>^ per cent, of the writers series. Fig. 8. Qass II., continuity of these fissures on both sides, present in45 per cent. Fig. 9. Class III., separation on both side
. The journal of mental pathology. AROCCIPITAL.—Spitzka. 31 and about the exoccipital fissure. I. is the paroccipital gyrus, or premierpli de passage; II. is the deuxieme pli; III. is the parietal lobe; IV. is theoccipital lobe. Fig. 6. Schematic arrangement of the fissures as they are represented inthe adult human brain. Fig. 7. Class I., left continuity and right separation of the parietal andparoccipital fissures. Present in 2>^ per cent, of the writers series. Fig. 8. Qass II., continuity of these fissures on both sides, present in45 per cent. Fig. 9. Class III., separation on both sides. Present in 17 per cent, ofcases. Fig. 10. Class IV., left separation and right continuity, the rarest condi-tion. Found in only 6 per cent, of the writers series. ABBREVIATIONS. FISSURES. GYRES, ETC. EOP Exoccipital f. OCCIP. LOBE Occipital lobe. INTCBL Intercerebral cleft. PAROC. G Paroccipital g. OC Occipital f. PAROC. ISM. Paroccipital isthmu, PAROC Paroccipital f. PTL. G Parietal g. PTL Parietal f. SBPTL. G Subparietal (Aftir P^rhtrJ
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