Outlines of comparative physiology touching the structure and development of the races of animals, living and extinct : for the use of schools and colleges . dat its lower border (8),the bevelled edge,which is overlapped bythe temporal bone. Fig. 83 is the inter-nal surface of the samebone, and at the loweranterior angle is shewnthe canal (12) for lodg-ing the middle arteryof the dura mater,which is here seen togroove the bone withits numerous branches On the internal sur-face of the parietalbones (fig, 84) we ob-serve the longitudinalgroove, sulcus longi-tudinalis (1, 1, 1), .forthe longitudi
Outlines of comparative physiology touching the structure and development of the races of animals, living and extinct : for the use of schools and colleges . dat its lower border (8),the bevelled edge,which is overlapped bythe temporal bone. Fig. 83 is the inter-nal surface of the samebone, and at the loweranterior angle is shewnthe canal (12) for lodg-ing the middle arteryof the dura mater,which is here seen togroove the bone withits numerous branches On the internal sur-face of the parietalbones (fig, 84) we ob-serve the longitudinalgroove, sulcus longi-tudinalis (1, 1, 1), .forthe longitudinal sinus BONES OF THE SKTTLL. 119 of the brain, and a number of little pits (2, 2, 2, 2), moreor less deep, in which the glandulse pacchionse are situated :there are also the impressiones digitatse (3, 3, 3, 3), and emi-uentise ma- Fig- 84. millares,(4, 4, 4, 4),producedby the con-volutions ofthe brain ;the groov-ings for themeningealarteries areseen at 5,5, 5, 5, andthe parietalholes at 6,6.[§ tempo-rals (ossatemporum),fig. 85, areof an irre-gular form,and consistof threeportions,the squa-mous (I),the mammillary (II), and the petrous (III.). Fig. 86, represents the ex-ternal surface of the squam-ous portion (a\ with the rootof zygomotic process (2),and the glenoid cavity for thehead of the lower jaw (6).The internal surface of thesame portion (fig. 87) exhi-bits the bevelled edge thatoverlaps the parietals, and thedepressions (6) for receivingthe convolutions of the cerebrum. Fig. 86.
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1870
