PLATE V . 



PAGE 



Fig. 1. Boukgceticrinus alabamexsis, n. sp.— Side view of the basal cone 



magnified 5 diameters, 118 



la. Superior face of the cone magnified 6 diameters. 

 16. Inferior end of the cone magnified 6 diameters. 

 lc. Side view natural size. 



Fig. 2. Cristellaria rotulata. ? D'Orbigny. — Side view magnified 17 diam- 



eters, 119 



2a. Keel showing the star-shaped opening at the extremity of the cell, 

 magnified 17 diameters. 



Figs. 3 and 3a. Calceocrixus radiculus, n. sp., natural size. . . . 120 



Fig. 4. Macrostylocrixus fusibrachiatus, n. sp., natural size, . . . 119 



Fig. 5. Subulites GRACILIS, n. sp., natural size, 116 



Fig. 6. Protaster miamiexsis, n. sp. — Ventral side natural size, . .116 

 6a. Oral pieces magnified 8 diameters. 

 66. Part of a ray magnified 3 diameters. 



Fig. 7. Orthoxotella faberi, n. sp.— Left valve magnified 8 diameters, . 117 

 7a. Hinge view magnified 8 diameters. 

 76. Left valve natural size. 



Fig. 8. Calymexe callicephala, Green. — Showing a furrowed test below 



the fixed cheeks, . 117 



Fig. 9. Heterocrine^ (Iocrixus) cehaxus, n. sp.— Anterior view of the body 



and a large portion of the arms . 175 



9a Posterior view of another specimen, showing the anal plate and ven- 

 tral extension. On the upper half of this specimen the arms are 

 removed, so as to show the frequently bifurcating armlets. 



96. A portion of one of the arms of 9a magnified 2 diameters. 



9c. Some of the imbricating plates of which the ventral sac is composed, 

 enlarged to 2 diameters. 



Fig. 10. Heterocrlnus pextagoxous, n. sp.— Posterior view, showing the 



arms, body and a portion of th'e column 17t> 



10a. Anterior view of another specimen of this species. 



