Aru 67 
the type would be written thus: 12345. In the case of 
the suppression of a band, a cypher (0) is used in lieu of 
its number, thus—12045—signifying that the correspond- 
ing band is deficient. The unicoiorous form is a case of 
the suppression of the entire series of bands, and for this 
the formula is five cyphers, thus—ooooo. In the case of 
coalescence of one or more bands, the numbers standing 
for the coalesced bands are enclosed within parentheses, 
é.g.—(12)3(45), which signifies that the first and second 
bands are fused together, also the fourth and fifth, the 
third only being free. Any combination of these formule 
may be used, as for instance, (12)305 signifies the 
coalescence of the first and second, and the suppression 
of the fourth. The black specimens afford an instance of 
the coalescence of all five bands, for which the formule 
is written thus—(12345). Additional bands which are to 
be considered as splits off the normal ones) are denoted 
by a small figure, thus— 123345 or 123345. 
1234|5 indicates that a split occurs either of the 4th or 
5th band forming an extra band intermediate. 
I : 345 indicates that traces only of band 2 are present. 
12345 indicates that the 4th band is very narrow. 
12345 indicates that the 4th band is very broad. 
I have had the curiosity to work out the possible plain 
band combinations and the result is tabulated on p. 7o. 
