PLATE III. 



pn', first pinnule. r, first radial. 



pn", second pinnule z, syzygy. 



1. Specimen seen facing the anterior radium, 2. Same as Plate II. Fig. 1. 



2. Another specimen seen facing the anterior radium, \. 



3. Broken, specimen seen facing the anal proboscis and the azygous interradium, f. 



Figs. 4-10 from specimen shown in Plate III. Fig. 3. 



4. Interradial plating between the first and second pinnules of adjacent arms. 



5. First radial and lower part of arm to the second pinnule, seen in profile, showing the mode of 



attachment of the interradial plates to the arm joints. 



6. Inner view of lower arm joints above first radial to the first pinnule, to show the mode of attach- 



ment of the interradial plating to the lower arm joints. 



7. Profile view of interradial plating below the first pinnule of another arm from that of Fig. 6. 



8. Interradial plating adjacent to the second pinnule, pn"; the arm joint is the upper brachial of 



lu 6. 

 0. Wing-like expansions of lower arm joints below second pinnule, adjoining the interradial plating, 



seen obliquely. 

 10. Interradial plating immediately above the first radial, seen obliquely. 



