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Show 262 MR. F. E. BEDDARD ON THE ANATOMY [June 6, patch of the gland on the dorsal side of the pyloric angle fiom which the splenic limb arises, and which is continuous benea 1 the end of the stomach with the main body of the pancreas. In Lacerta ocellata the splenic limb arises from the main lobe o the pancreas further towards the gall-bladder. In these points the Text-fig. 36. Pancreas of Lacerta ocellata (left-hand figure) and of Gerrhosaurus flavigularis (right-hand figure). P. Pancreas; py. Commencement of intestine; spl. Spleen; St. Stomach. pancreas of Gerrhosaurus agrees with that of the Skinks, in which, however, there is a tendency towards an enlargement of the dorsal lobe of the pancreas and a disappearance of the splenic lobe. I could not detect the latter in Macroscincus, and it was very thin in Tiliqua. Arterial System. As one of the two specimens of Gerrhosaurus flavigularis which I have dissected was successfully injected, I am able to give some account of the arterial system, dealing particularly with those points which vary among the families of Lacertilia. The heart has the usual, but not universal, tag tying the apex of the ventricle to the pericardium. The pericardium extends forward beyond the trifurcation of the arteria innominata. A pair of arteries exist of very fair size, running one on each side of the trachea in the position occupied by the carotids in many Vertebrates, and they are like them quite close to the trachea. These arteries have, however, nothing whatever to do with the carotids. They are branches of the pulmonary arteries (P, text-fig. 37), and the existence of these arteries in what appears to be an unexpected place is possibly indicative of a former forward extension of lung-tissue. The branches of the carotid arch differ slightly from those of |