Note 57 — Chapter I · DOMESTIC DOGS AND CATS.
Reading edition
Isid. Geoffroy Saint-Hilaire ‘Hist. des Anomalies,’ 1832, tom. i. p. 660, Gervais ‘Hist. Nat. des Mammifères,’ tom. ii., 1855, p. 66. De Blainville (‘Ostéographie, Canidæ,’ p. 137) has also seen an extra molar on both sides.