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Show 1893.] ON THE SCIENTIFIC NAME OF A HIMALAYAN CUCKOO. 315 of the Island of Reil. The direction, too, of the fissure was certainly not so vertical in tbe brain examined by myself. M y own observations tend to show that the two species of Elephant do not diverge so greatly in the course of this fissure as might be inferred from the diagrams of Krueg. The lateral fissure is represented as not joining the coronal fissure in the African Elephant; but the two appear to be continuous in the Indian Elephant. This difference is evidently not one of importance, since, as I have pointed out above, the lateral fissure is quite different on the two sides of the brain. I ought to remark, perhaps, as it may give a little more value to the statements made in the present paper, that I purposely abstained from consulting Krueg until I had drawn up a description of the brain from m y own study. Hence I have not, I believe, been prejudiced in favour of any particular furrows. In a complex brain like that of the Elephant it is a very difficult matter to settle the order of importance of the furrows. The plan I have adopted is to lay most weight upon such furrows as are common to both sides of the brain ; their depth I regard as the next most important character of those open to m e to select from. I believe, therefore, after taking these points into consideration, that in addition to the " Hauptf urchen " allowed by Krueg, we must add (1) the representative (?) of a fissure of Rolando, (2) a fissure, which I have called post-temporal, lying behind the supra- Sylvian and curving forwards to run for a considerable distance along the upper surface of the brain. The plates contain faithful copies of the actual convolutions, made by Mr. P. Smit. EXPLANATION OF THE PLATES. PLATE XXII. A superficial view of tbe brain of the African Elephant. PLATE XXIII. Fig. 1. Lateral view of tbe brain of tbe African Elephant; right side. This figure is ratber more tilted than the next, so that tbe actual dorsal surface of tbe brain is not visible. 2. Ditto, left side. Sy, Sylvian fissure; P.s, pre-Sylvian fissure; F.E, fissure of Eolando ; A, longitudinal fissure or dorsal aspect of brain; A.t, anterior temporal fissure ; P.t, posterior temporal fissure; Eh, rhinal fissure. 3. On the Scientific Name of a Himalayan Cuckoo. By W. T. BLANFORD, F.R.S. [Eeceived March 28, 1893.] Four species of true Cuckoo, belonging to the genus Cuculus, are found in the Himalayas and in some other parts of India. In Jerdon's ' Birds of India ' these four species were described under the names of C. canorus, C. himalayanus, C. poliocephalus, and |