1893.] ON THE SCIEIS-TIFIC NAME OF A HIMALAYAN CUCKOO. 3] 5 



of the Island of Eeil. The direction, too, of the fissure was certainly 

 not so vertical in the brain examined by myself. 



My 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 fis- 

 sure in the African Elephant ; but the two appear to be continuous 

 in the Indian Elephant. This difiference 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 my 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 oi: 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 me to select from. 



I believe, therefore, after taking these points into consideration, 

 that in addition to the " Hauptfurchen" allowed by Krueg, we 

 must add (1) the representative (?) of a fissure of Eolando, (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 OP THE PLATES. 



Plate XXII. 



A superficial view of the brain of the African Elephant. 



Plate XXIII. 



Fig. 1. Lateral view of the brain of the African Elephant; right side. This 

 figure is rather more tilted than the next, so that the actual dorsal 

 surface of the brain is not visible. 

 2. Ditto, left side. 



Si/, Sylvian fissure ; P.s, pre-Sylvian fissure ; F.E, fissure of Rolando ; A, lon- 

 gitudinal 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. 



[Received March 28, 1893.] 



Eour species of true Cuckoo, belonging to the genus Gueulus, 

 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, G. poliocephalus, and 



