A MONOGRAPH OF THE EXISTING CRINOIDS 



163 



sloping than in most specimens from Port Phillip, where they are usually, but not always, 

 nearly vertical. In 20 specimens from Port Phillip the dorsal pole varied from 0.8 to 

 1.6 mm. across, averaging 1.2 mm. There is then an overlap with regard to this char- 

 acter which does not permit more than an infraspecific distinction of the two sets of 

 specimens. 



a 



mm 



Q^^crnx=3=x 



Figure 10. — a, Antedon incommoda incommoda (Bell), B.M., 93.7.8.2-S, Port Phillip, dorsal 

 view of centrodorsal and part of postradial series, b, A. incommoda austini sp. nov., B.M. 

 86.2.25.4-9, dorsal and slightly lateral view of centrodorsal and part of postradial series; 

 c, same, base of Pi; d. Pa; e, peripheral cirrus. 



