C. L. Edwards 277 
TABLE XXVII. 
2. Diameter in cm. 
Adult 
Youug 
Number of Cases 
Mean 
Standard Deviation 
Coefficient of Variation . . . 
Range of Variation 
12 
5-383+ -286 
1-470+ -202 
27-314 + 3-760 
3-2—7-6 
8 
2-325+ -212 
-600+ -101 
25-785+ -435 
1-4—3-2 
TABLE XXVIII. 
3. Volume in cm? v = 
! 
Adult 
Young 
Number of Cases ... 
Mean 
Standard Deviation 
Coefficient of Variation ... 
Range of Variation 
12 
170- 335 + 33-450 
171- 793 + 23-653 
100-856+13-886 
49-46—538-49 
8 
20-200 + 2-495 
10-461 + 1-764 
51-788 + 8-733 
1-93— 36 19 
B. Colour. 
The colour was determined from alcoholic specimens by the method described 
on p. 244 for H.floridana. 
a. Colouration. 
1. Pedicels and Papillae. The dorsal stalks of the adult are seal-brown in all 
but one individual in which they are light Front's brown, while the ventral stalks 
are seal-brown except in two cases of light sepia, and one where some are drab with 
a ring of seal-brown. In the young both the dorsal and ventral stalks are seal- 
brown except in one individual where they are of the darker clove-brown. The 
ends of the appendages are generally coloured like the stalks, or of some lighter 
tint, like sepia, clay-colour, Isabella-colour, or cinnamon. Semper, 1868, p. 88, 
describes the ends as whitish in life. 
2. Distribution of Colour on tlie Body. As graphically shown in Plate I. 160 — 
167, the body is almost always of a uniform seal-brown. Two of the adults have 
blotches of light sepia on the ventral side and one has Prout's brown mid-dorsally. 
One of the young has a circumanal ring of dark pearl gray and another is clove- 
brown. Sluiter, 1895, notes a red {steinrot) colour in life. Pearson, 1903, speaks 
of some specimens when alive being quite black above but pink below. Sluiter, 
