Transactions . on alevel with the blind end of the branch just spoken of assweeping halfway round the latter canal, so that the veryshallow cup-shaped depression formed by the end of thisbranch upon the cut surface of the septum between thetwo canals, while plainly distinguishable in the specimenand indistinctly so in the photograph, is not, by reason ofthe imperfections of the art of engraving, to be made outin the illustration. Its position on the cut surface of theseptum is directly below the lower corner of the irregularly 594 RICHARDS. heart-shaped opening into the secondary tympanic cavi
Transactions . on alevel with the blind end of the branch just spoken of assweeping halfway round the latter canal, so that the veryshallow cup-shaped depression formed by the end of thisbranch upon the cut surface of the septum between thetwo canals, while plainly distinguishable in the specimenand indistinctly so in the photograph, is not, by reason ofthe imperfections of the art of engraving, to be made outin the illustration. Its position on the cut surface of theseptum is directly below the lower corner of the irregularly 594 RICHARDS. heart-shaped opening into the secondary tympanic cavity,which opening is seen as a black hole somewhat above andto the lelt of the central point of the picture. The largeintra-petrous cell I am now describing does communicatetherefore with the lower part of the tympanum thi-ough themedium of the secondary tympanic cavity, but it does notcommunicate with the chamber containing the ossicles ; yetit is probably the analogue of the mastoid antrum in Fig. 2. The three cells whose anterior extremities are seen in theupper left hand corner of Fig. 2 belong to the system com-prised within the mastoid prominence of the exoccipitalbone. The curved line of suture separating this bonefrom the squamosal (or it ma}^ be the tympanic at this pre- ANATOMY OF THE ELEPHANTs EAR. 595 cise point) has its extremities, so far as shown in the illus-tration, at the points marked a and b on the c on the upper margin the suture separating thesquamosal (or the tympanic?) from the periotic runs diag-onally downwards and to the left until it meets the chief object that 1 desired to attain by the presenta-tion of Fig. 2 was a demonstration of the course, calibre,and direction of the Fallopian canal. This demonstrationthe picture gives fairly well. All the structures repre-sented are shown somewhat larger than their naturalsize, being magnified about 20 per cent. ; the view istaken looking directly toward the median line, /. c, fro
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Keywords: ., boo, bookcentury1800, bookdecade1860, booksubjectear, bookyear1868
