CAULOPHACUS SCHULZEI. 
63 
DISCOCOMES. 
Dimensional groups I II Lisi IV 
(diameter) (70-131.5) (131.5-191) (191-251.5) (251.5-312) 
Number of discocomes of i 3 P 
each group measured 5 7 
limits p 70-130 136-186 200-250 270-312 
Diameter 
average u 97.1 162.3 225 .4 296.5 
limits » 20-35 30-50 45-65 44-65 
Tength of average u 20.1 40 54.4 54.9 
main-rays 
average per- 
cent of total 27.9 24.6 24.1 18.4 
diameter 
num- a £ 9-18 6-11 
ber on limits and more and more 8 6-9 
each 
main- aver- 
an — about 16 8.5 8 8 
limit 
oa ‘ 18-35 25-48 55-60 70-103 
End-rays - —— 
length aver- 20 58.3 93 
age u st 41.2 ; 8 
aver- 
age 
per- 
cent of PPY A 25.4 25.9 31.6 
total 
‘diam- 
eter 
Apical 
angle of limits 40-100 28-60 30-35 25-35 
terminal = 
bunch or 
verticil of average 65 38 33 29 
end-ray 
the main-rays, from which the bunches or verticils of end-rays arise, is very 
different in discocomes of different size (Plate 10, figs. 17-25); long and conical 
in the large ones (Plate 10, figs. 19-21), and short and more disc-shaped in the 
small ones (Plate 10, figs. 22-25). 
In consequence of all these differences the large discocomes differ from the 
small ones very considerably in appearance; they nevertheless represent a fairly 
continuous series of forms. 
Some of the small discocomes here considered, like those less than 70 u in 
