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Show 1871.] MR. ST. GEORGE MIVART ON HEMICENTETES. 65 The skeleton of Hemicentetes closely resembles that of Centetes, except that the neural spines, especially the cervical ones, are relatively, as well as absolutely, less developed, and that the dorso-lumbar vertebrae are twenty, or at most twenty-one, in number, instead of twenty-three or twenty-four as in Centetes. The pubic Fig. 9. Pelvis, once and a half the size of nature. symphysis is also widely open in some individuals (probably females) and the humerus is not quite so long as the scapula Moreover the os scaphoides is distinct from the os lunare; and there is no os intermedium. Since the publication of my paper on the osteology of the Insectivora* additional material has come to hand. Thus skeletons not onlv of Hemicentetes (formerly known as Centetes madagascariensis) but also new ones of Rhynchocyon and Petrodromus,^have been added to the British Museum and the co lection of the Royal College of Surgeons. At the last-named institution there has also been received imperfect skeleton of Ericuus, which is here figured bv the kind permission of the Council and Curator JRhynchocyon.--AS to this genus I am now able to add that the occTpiS foramen looks mainly backward that the pterygoid fossa does no nearly extend so far forward as the hinder margin of the _l»tP that there is no paroccipital process, and that there is a very V ^ m ^ ^ l ^ behind the external auditory meatus, but a more mark dPpr0jection at the lower end of the mastoid where it runs downTehiiV the auditory bulla at the posterior end of the hrra^ are t l minute teeth in the place of the first upper premolar. As * gee 'Cambridge Journal of Anatomy,' vol. i. (1867) p. 281, and vol. ii. (1869) p. H 7 . PROC ZOOL. Soc-1871, No. V. |