Figures and Descriptions Illustrative of British Organic Remains Volume 3; Monograph[s]. (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1877 Excerpt: ...is nearly 9 inches, while its greatest transverse diameter is 5 8 inches. For a long time, I took this bone to be a coracoid, but better specimens, which have come under my notice, prove it to be a right ilium of which only the injured inner face is displayed. Two almost perfect impressions of the outer face of the ilium, both belonging to the right side, but one considerably larger than the other, have been obtained at Lossiemouth (Plate X., figs. 3 and 4). The wide and shallow acetabular cavity occupies all that part of the external face of the bone, which in the specimen figured in Plate VI. is terminated by a semicircular edge. But it is seen that the corresponding edge of the perfect ilium is not truly semicircular, but is formed by two edges, one anteroinferior and the other postero-inferior. The postero-inferior edge is undulating, the antero-inferior straighter; but the two edges meet in an obtuse angle, and there is no trace of any notch or excavation in this border of the bone. On the dorsal side, the acetabular cavity is bounded by a sharp projecting ridge continuous with its roof. In front, this passes gradually into the outer face of the thick and rounded pillar which bounds the acetabulum anteriorly. Behind, on the other hand, the ridge ceases suddenly at the level of the neck by which the ala of the ilium passes into its acetabular portion; so that a sort of shallow and broad notch lies between the end of the ridge and the thickened extremity of the posterior pillar, or hinder margin of the acetabular cavity. At the free ends of the two pillars, the ventral margin of the acetabular wall is very thick and rugose, that of the anterior pillar being half as large again as that of the posterior. Between these two the rest of the edge is thin. The ...