65 



in the geographical region of East Java, the same number in the corre- 

 sponding altitudinal section in Middle and also in West Java. For the 

 geographical region of East Java the letters a, b, c, d, e, f are reserved ; 

 for the geographical region of Middle Java the letters g, h, i, j, k, I are 

 reserved, and for the geographical region of West Java the letters m. n, p, 

 t, r, s, w are reserved. 



In East Java the first type area established in the first altitudinal sec- 

 tion receives the letter a, and the first plant numbered in that section re- 

 ceives the number 1 in combination with the letter — that is, 1 a ; the sec- 

 ond plant numbered is 2 a ; the third 3 a, and so on up to 3000, if neces- 

 sary or desirable. The second plot in the same altitudinal section and 

 geographical region may be established 100 miles away from the first, 

 and this receives the distinctive letter b ; the first numbered tree in that 

 section is 1 b, the second 2 b, and so on. Tn the second altitudinal sec- 

 tion there is a great decrease in the number of tree species, and for this 

 section are reserved the numbers from 3001 to 5000, used in combination 

 with the same letters a, b, c, d, e, f for East Java, as in the first altitudinal 

 section, these six letters being the distinctive letters for the geographical 

 region of East Java. As in the first altitudinal section, the first type area 

 established receives the distinctive letter a, but the first tree that receives 

 a number in that type area is numbered 3001 a ; the second 3002 a, etc. 

 The third altitudinal section is marked by a very sharp decrease in the 

 number of tree species, and for this section — that is, between 2,000 and 

 3,000 meters in altitude — it is only necessary to reserve 500 numbers, the 

 letters a, b, c, etc., being applied to the type areas established but the se- 

 quence of numbers employed being between the limits of 5001 and 5500. 

 The fourth altitudinal section, or the alpine region, is confined to the high 

 mountain tops above 3,000 meters in altitude. The area of this high 

 region is very limited, as is also the number of tree species, but fifteen or 

 so being found. For this region only the numbers between 5501 and 5550 

 are reserved. 



In Middle Java and in West Java, the other two geographical regions, 

 the same sequence of numbers is used for the different altitudinal sec- 

 tions as in East Java, but Middle Java and West Java have distinctive 

 series of letters as previously noted. 



To further illustrate this scheme it may be well to cite and explain a 

 few of the combinations. For instance, 1500 6 shows that the specimen 

 in question was collected between the sea level and an altitude of 1,000 

 meters in type area b, in the geographical region of East Java, and 

 that further details regarding the specimen will be found in the reg- 

 ister of type area b and in the notes under that number. No. 3601 / 

 shows at once that the specimen in question was collected at an altitude 

 of between 1,000 and 2,000 meters in the geographical region of Middle 

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