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JOURNAL, R.A.S. (CEYLON). [VOL. XY. 



illustrated in our monkey-case upstairs. We have now seen 

 two types of the " Wallacian wood " : one in which extreme 

 variability is found in every locality over a vast area, and 

 a second in which it occurs in a very restricted area. 



Another form of " Wallacian wood " is that in which we 

 have great variety over a vast area, but the varieties do 

 not intermingle, and each being confined within certain 

 geographical limits is classified as a distinct species. 

 Professor Wallace has illustrated this so beautifully in his 

 Island Life and other works that I need not dwell further 

 upon it. 



Another form of " Wallacian wood " is that in which well- 

 defined species in a very limited area are mingled with 

 well-defined species covering large areas. A good example 

 of this is seen in our pretty little Munias. We have a species 

 peculiar to Ceylon, Uroloncha Kelaarti. We share another 

 with Southern India, U. striata. From this U. semistriata 

 of the Nicobars and U. fumigata of the Andamans both 

 differ slightly, being thus reckoned as species peculiar to 

 these islands. Our other two species, U. malabarica and 

 U. punctulata, range over the whole continent of India, 

 ascending the Himalayas up to about 5,000 ft. 



Another form of distribution, the opposite extreme to that 

 of the money cowry, is exemplified by our common sparrow, 

 in which a form is constant over a very large area, or varies 

 but very slightly. The Colombo sparrow undoubtedly 

 varies slightly from the London sparrow, but not sufficiently, 

 according to Messrs. Sharpe and Oates, to make them distinct 

 species. 



Finally, we have what may be termed " sports," variations 

 of very rare occurrence, of which I exhibit two examples : 

 one is a sport of the common Batocera rubus from the 

 Morawak korale, presented by Mr. Deslandes. This has 

 been described by Mr. Gahan of the British Museum as 

 B. polli. Another example is from Rambukkana, a 

 female Gongy lodes gongy lodes, presented by Mr. T.S.Dawson. 



