906 MR. E. G. BOULENGER ON THE 



The dimensions, in inches, of the specimens represented in 

 text-figs. 123 & 124 are as follows : — 



J5. sondaicus. J3. s. lowi. 



Length of horn on outer curve 25 21 ^ 



Basal girth of ditto 11^ 12^ 



Maximum span of horns 28 23| 



Tip-to-tip interval of ditto 16 13 



Length from intercornual ridge of 



skvill to tip of nasals 16 13g 



Minimum width of skull between base 



of horn-core and orbit 9 7| 



These diiFerences fully justify the right of the Bornean Bantin 

 to i^acial distinction, and as none of the comparatively few 

 synonyms of Bos sondaicus appears referable to that race, I 

 propose that it should be known as B. sondaicus loioi ; the skull 

 and horns represented in text-fig. 124 (B. M. No. 87.2.10.4) 

 being the type. 



It may be added that both the Burmese Bantin or Tsaine, for 

 which I proposed the name of B. s. hirtuanicus in the Society's 

 'Proceedings' for 1898, p. 277, and the Siamese Bantin, for 

 which I have suggested the name of B. s. jMvteri, Ibid. 1909, 

 p. 669, have horns of the general type of those of the typical 

 race, although those of the Siamese race are more heavily wrinkled 

 at the base than any Javan horns in the British Museum. 



Information is still required as to whether the Bantin occurs 

 in Sumatra. 



56. Notes on the Breeding oE the "Millions'' Fish {Girar- 

 dimcs pceciloides). By Edward G. Boulenger, F.Z.S., 

 Curator of Reptiles. 



[Received October 18, 1912 : Eead October 29, 1912.] 



The little fish Girardinus poeciloides, popularly known as 

 "Millions" in Barbados on account of the enormous numbers 

 frequenting all the shallow pools in that island, is said to be 

 of great practical value on account of its devouring mosquitoes ; 

 the absence of malaria, which is ,so prevalent in the neighbouring 

 islands, is believed to be due, as first pointed out by Mr. C. 

 Kenrick Gibbons, to the presence of this fish, for the insect con- 

 veying the malarial disease breeds only in shallow pools, where 

 these fish abound and, it is well to add, have no competitors, 

 (x. pceciloides being the only freshwater fish inhabiting Barbados, 

 For this reason, the Society arranged with the Colonial Ofiice to 

 keep a large stock and to supply specimens to various tropical 

 stations in the British Empire. The fishes have bred on numerous 

 occasions in small aquariums in the Reptile and Tortoise Houses, 



