PLATE LXVI. 



Page 

 Plattcrinus hemisphericus M. and W 703 



Fig. la. Specimen showing arms and stem. 



U. Dorsal aspect of another specimen with arms spreading, and a Platyceras 



infundihulum covering anal opening. 

 \c. Lateral view of the calyx; also a Plutyceras infundihulum attached. 

 1(/. Ventral aspect of another specimen. 



Plattcrixus subspinulosus Hall 684 



2ii. Lateral view of the dorsal cup ; a very large specimen. 

 2b. Base of the same specimen. 



Platycrinus verrucosus White 705 



3". Lateral view of the dorsal cup. 

 3i. Dorsal aspect of the same. 



Platycrinus excavatus Hall 718 



4. A specimen with arms. (The figure does not show sufficiently the abrupt 

 depressions on the radials just below their facets.) 



Platycrixus xodo-striatus W. and Sp 698 



5a. Dorsal aspect. 



5b. Side view of a somewhat depressed specimen. 



Platycrinus Yandelli 0. and Sh 706 



Grt. Dorsal aspect of a specimen with arms. 



(SI). Posterior view of calyx. 



6c. Ventral aspect of the same specimen. 



Platycrinus spinifer W. and Sp 708 



7. The type specimen with arms. 



Platycrinus ornigranulus McChesney 701 



8. A specimen with arms. 



Platycrinus subspinosus Hall 717 



9". Dorsal aspect of a perfect specimen with arms. (Mus. Comp. Zool.) 

 9/^ Ventral aspect of the calyx. 



Platycrinus discoideus 0. and Sh 713 



10(7. Dorsal aspect of a specimen with arms, the outer parts of the latter slightly 



restored in two rays. 

 lOJ, Ventral aspect of the calyx. 

 10c. Posterior side of the same specimen. 



(.\U specimens, except Fig. 9a, in the collection of Wachsmuth and Springer.) 



