| OCR Text |
Show 1890.] DENTAL ABNORMALITIES. 377 upper molar on one side and 5 cases of an additional upper molar on both sides. I have found the following abnormalities in skulls at the British Museum:- C. magellanicus, No. 46. 11.3. 9: an extra lower molar on both sides. C. lateralis, No. 71.5.27.8: five premolars on the right side. One of these is an extra tooth introduced between P. 1 and P. 2, as is shown by the presence of a corresponding diastema on the left side. C. cancrivorus, No. 10336: a small extra lower molar on both sides. In No. 46. 6. 15. 3, on the right side of the mandible there is, instead of the third lower molar, a bunch of five small denticles, as shown in the accompanying figure. Hindmost teeth of right side of mandible of a specimen of Canis cancrivorus. Twice the size of nature. In skull No. 84. 2. 21. 1 there is a very small extra lower molar on one side. In Cyon javanicus. No. 58. 5. 4. 99, the second upper molar is wanting on both sides. Professor Huxley has noted ' the abnormalities above given as regards C. magellanicus and C. cancrivorus, including the five small denticles. He has also called attention to a South-American canine skull described by Van der Hoeven as having an extra upper molar 1 In his papers on the Canidce, P. Z. S. 1880, p. 268. |
