PLATE XLIV. 



Hemiaster whitei Clark (p. 89). 



U. S. Nat. Mus. 9732, type. 

 Figure la. Lower surface of the test. 



lb. Right anterolateral interambulaerum, X 3. 



lc. Lower portion of the petaloidal region of the right anterolateral ambulacrum, X 8. 

 Id. Several plates of the petaloidal region of the left anterolateral ambulacrum, X 8. 

 le. Peristomial opening, with surrounding ambulacra! and interambulacral plates, X 3. 

 If. Apical system, X 5. 

 lg. Left anterolateral ambulacrum, X 3. 



lh. Diagram showing the arrangement of the plates in the apical system and bordering areas, X 3. 



273 



