Occasional Papers of the Museum of Zoology 61 
PEATEs 
The numbers of the figures are the same as used in the 
dimension tables in the text. The scale of each plate is shown 
on it, by means of a hair-line, which represents, in plates 
I—XIII, an actual length of one centimeter. In the other plates, 
the scale is indicated above each hair-line. All drawings were 
made with the aid of a camera lucida. 
