444 



MKRISTIC VARIATION. 



rp 



[PART i. 



ra 



la 



II 



1 hi. 137. A'C/I/HHS wt'hi. No. 680, having the right posterior ambulacrum 

 Initially nil-rut. ", anterior ambulacrum, ra, In, ri^'ht and left anterior ambu- 

 lacra, rp, lp, ri^ht and left posterior ambulacra. I. View from apex. II. View 

 from oral surface. (From PHILIPPI.) 



