THE SPINE MODE OF CENTROPYXIS ACULEATA. Lia 
3. Gold Creek, Fig. 4. June, 1915. 
No. of spines 2 SOs 
Frequency LE EG a at 
Total frequency 42 Mode 3 
20 ; 
eg] eae 
oF aa a 
a Pam ah 
5 ee es 
6) 
No of spines. 
Fig. 4. Spine frequency polygon. Gold Creek, June 1915. 
4. Ironside, Fig. 5. 7th October, 1916. 
No. of spines | Oey ers rare: Lawn 25 yous 0 alee uy ease el I) 
Frequency ae Hae 7) 9 Os ayn 0) ol 
Total frequency 121 Mode 3—4 
TP rae eee 
reel es a 
ie ieee el 
Pcme: eae 
Ee a a ee ee 
ta Sal Ped ome) os oe oo Ba 
MASE ahem 
PEEEEE SED | 
Fig. 5. Spine frequency polygon. Ironside, 7th October, 1916. 
