APPENDIX. 
A. It is very desirable that the proposition of every new systematic 
group should be accompanied by a diagnosis, both individual and dif- 
ferential, of said group in English, French, German, Italian, or Latin. 
This diagonsis should state in what museum the type specimen has 
been deposited and should give the museum number of said specimen. 
B. In publications issued in any other language than English, 
French, German. Italian, or Latin it is very desirable that the expla- 
nation of figures be translated into one of these tongues. 
C. The metric system of weights ar.d measures and the centi- 
grade thermometer of Celsius are adopted as standard. The micron 
(0.001mm.), represented by the Greek letter p, is adopted as the unit 
of measure in microscopic work. 
D. The indication of enlargement or of reduction, which is very 
desirable for the comprehension of an illustration, should be expressed 
in figures rather than by mentioning the system of lenses used. 
E. The indication of enlargement or reduction of an object is usually 
linear. The sign of multiplication is used for enlargement, and the 
fraction for reduction. Examples: X50 indicates that the object is 
enlarged 50 times; ^ indicates that it is reduced to 5 , 6 th. 
If it is desired to specify that the enlargement is linear, surface, or 
mass, this may be done as follows: X50 1 indicates linear enlargement; 
XoO' 2 indicates surface enlargement; X50 3 indicates mass enlargement. 
F. Transcription of Greek words: 
The following table indicates the manner in which Greek words 
should be transcribed: 
£ = e 
(vaXeos) 
— Hyalea, not Hyaltea. 
V = e 
( 7Z£ipr/vrf ) 
— Pirena, not Pirina. 
final 7 1 — a 
(7 reipyr?]) 
— Pirena, not Pirene. 
II 
Ok 
(ryOvs) 
— Tethys, not Tety T s. 
i — i 
(fSaXios) 
— Balia, not Balea. 
K — C 
(innoKpyvif) 
— Hippocrena, not Hippochrenes. 
Z — x 
(Zeros) 
— Xenus, Xenophora. 
p — r 
(mepov) 
— Pterum. 
V — y 
(vfios) 
— Hybolithus, not Hibolites. 
on — ae 
(Xijuvazos) 
— Limnsea, not Limnea. 
av — au 
(yXavKOs) 
— Glaucus. 
si = i 
(X8iXos) 
— Chilostomum, not Cheilostoma. 
II 
a 
(svpog) 
— Eurus. 
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