1909.] ON THE CETACEAN SOTALIA BORNEENSTS. 883 



specimen from Java halfway between the j'ellow form {cuprina 

 Felder) and your drawing ; it is named Euschema friihstorferi 

 Rober. yours being evidently an extreme form of that species." 



Though it may be only an aberration it seems desii'able, foi' 

 convenience, that this form should have a name, so I pi'opose to 

 call it " simiatrensis." 



EXPLANATION OF PLATE LXXXII. 



Fig. 1. Aberration of Papilio clijtia, race ■panvpe. 



2. Do. 



3. Do. 



4. Do. Cethosia nicoharica. 



5. Do. JEuthalia cibaritis. 



6. Euschema sumatrensis. 



4. Note on the Cetacean Sotalia horneensis. 



By R. LVDEKKEE *. 



[Received September 29, 1909.J 



When describing in the Society's ' Proceedings' for 1901 (p. 88, 

 pi. viii.) an estuarine Dolphin from Borneo, under the name of 

 ySotalia horneensis, I had no information as to the colour of the 

 type-specimen in life, but assumed that this was approximately 

 shown by the skin. In this I was wrong, for I have recently been 

 informed by Mr. Ernest Hose, who saw the specimen alive, that 

 the original colour of the upper svirface was pale bluish slate, or 

 slaty blue, and that of the under-parts greyish white. This brings 

 it into much closer connection, so far at least as colour is con- 

 cerned, with Sotalia sinensis, which is described as being cream- 

 coloured with pinkish fins and black eyes. The type-specimen 

 has, however, only ^ teeth, against |^ in the Bornean DoljAin, 

 and as the teeth are smaller in the Bornean than in the Chinese 

 specimen, the specific distinctness of the former may, at all events 

 provisionally, be still admitted. I may add that a plaster-model of 

 the type-specimen of S. horneensis preserved in the British 

 Museum (Nat. Hist.) has been coloured from a sketch kindly 

 supplied by Mr. Hose. 



* Communicated by permission of the Trustees of the British Museum. 



Proc. Zool. Soo.— 1909, No, LX. 60 



