REVISION OF PALEOZOIC STELLEROIDEA. 293 



PLATE 13. 



FIGS. 1 and 2. Promopalseaster wilsoni (Raymond). 



1. Photograph X 1.5 of the holotype, showing the abactinal side. 



2. One of the rays of the holotype X 3. 



Middle Ordovicic (Lowville). City View, Ottawa, Canada. 



Collection of Miss A. E. Wilson. 

 FIG. 3. Promopalseaster prenuntius, new species (also see plate 15). 



Photograph, natural size, of the actinal side of the holotype. 



Middle Ordovicic (Lower Trenton). Frankfort, Kentucky. 



Collection of the State University of Kentucky. 

 FIG. 4. Anorthaster miamiensis (Miller) (see also plate 20). 



Retouched photograph, natural size, of the actinal side of the holotype. 



Upper Ordovicic (Richmondian). Waynesville, Ohio. 



Harris collection of the United States National Museum (Cat. No. 

 40880). 

 FIG. 5. Neopalseaster crawfordsvillensis (Miller) (see also plate 23). 



Retouched photograph, natural size, of the holotype, showing the abac- 

 tinal area. 



Mississippic (Keokuk). Crawfordsville, Indiana. 



Harris collection of the United States National Museum (Cat. No. 60607). 



PLATE 14. 



FIGS. 1 and 2. Promopalseaster speciosus (Meek)? 



Reproduction, natural size, of the original lithograph of "Asterias prir 

 mordialis." Probably the young of P. speciosus. 



Upper Ordovicic (Maysvillian). Cincinnati, Ohio. 



The specimen is now lost. 

 FIGS. 3 and 4. Promopalseaster speciosus (Meek) (also see plate 15). 



Photographs, natural size, of the abactinal and actinal sides of the 

 holotype. 



Upper Ordovicic (Maysvillian). Cincinnati, Ohio. 



Dyer collection of the Museum of Comparative Zoology, Harvard 

 University (No. 22). 



PLATE 15. 



FIGS. 1-4. Promopal&easter speciosus (Meek) (also see plate 14). 



1. Camera lucida drawing X 4 of an interbrachial area. 



2. Camera lucida drawing X 4 across a ray at about its mid-length. 

 From the actinal side, showing the ambulacrals, podial openings, 



adambulacrals, inframarginals, and supramarginals. 



3. Two adambulacral spines near oral region, X 7. 



4. A part of the abactinal area of a ray near its mid-length, X 2.5. 

 All drawn from the holotype. 



Upper Ordovicic (Maysvillian). Cincinnati, Ohio. 

 Dyer collection of the Museum of Comparative Zoology, Harvard Uni- 

 versity (No. 22). 

 FIG. 5. Promopalseaster prenuntius, new species (also see plate 13). 



Diagram of the actinal interbrachial plate arrangement. 



