EEVISION OF PALEOZOIC STELLEEOIDEA. 293 



Plate 13. 



Figs. 1 and 2. — Promopalxastcr wilsoyii (Raymond). 



1. Photograph X 1.5 of the holotj'pe, Bhowing 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. — Promopalxastcr preniintius, new species (also see plate 15). 



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



Mddle 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). Waynes\dlle, Ohio. 



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

 40880). 

 Fig. 5. — Neopalxaster craiufordsvillensis (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. — Promopalaeaster speciosus (Meek)? 



Reproduction, natural size, of the original lithograph of "Asterias pri- 

 mordialis." Probably the young of P. speciosus. 



Upper Ordo\dcic (Maysvillian). Cincinnati, Ohio. 



The specimen is now lost. 

 Figs. 3 and 4. — Proviopalseaster speciosus (Meek) (also see plate 15). 



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

 holotype. 



Upper Ordo\'icic (Maysvillian). Cincinnati, Oliio. 



Dyer collection of the Museum of Comparative Zoology, Harvard 

 University (No. 22). 



Plate 15. 



Figs. 1-4. — Promopalxaster 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 Ordo\dcic (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. 



