NO. 6 NEW AMERICAN EDRIOASTEROIDEA BASSLER 2.^ 



PAGE 



Fig. 8. Thresherodiscus rainosus Foerste 15 



Oral surface, X 2, showing much branched anibulacral rays 



with a pronounced trimerous origin. 

 Trenton (Curdsville) : Goat Island, northeast of Little Current, 

 Manitoulin Island, Lake Huron. 



Fig. 9. Isorophus (Agelacrinus) austini (Foerste) 17 



(See also pi. 6, figs, i, 2.) 

 One of the type specimens, X 4, attached to a stony bryozoan. 

 Richmond (Whitewater) : Dutch Creek, Clinton Co., Ohio. 



Fig. 10. Cincinnatidiscus edeiiensis, new species 6 



(See also pi. 3, fig. 11.) 

 One of three individuals, X 4, attached to a ramose bryozoan. 

 The long, narrow, erect covering plates of the ambulacra are 

 distinctive. 

 Cincinnatian (Eden-McMicken) : Cincinnati, Ohio. 

 Figs, ii, 12. Cincinnatidiscus (Hcmicystitcs) stcllatiis (Hall) 5 



11. A theca with six ambulacra, X i-3, attached to a brachiopod 

 ( Rafincsquina ) . 



12. Sketch of theca showing pentagonal outline, short, broad 

 ambulacra, and oral plates. 



Cincinnatian (Maysville-Fairmount and Bellevue) : Cincinnati, 

 Ohio. 

 Fig. 13. Carneyella nicklesi, new species 7 



Theca, X 4, attached to shell, exhibiting the long, strongly curved 

 ambulacra and the coarse plates with fine surface ornament. 

 The anterior ray has been broken away. 



Trenton (Curdsville) : near Troy, Woodford Co., Kentucky. 

 Fig. 14. Carneyella {Agelacrinus) vctnsta (Foerste) 7 



Holotype, X 4, attached to a brachiopod, showing short, well- 

 curved ambulacra and especially the very papillose surface 

 ornament obscuring the plate outlines. 



Trenton (Cynthiana) : Clay's Ferry, 14 miles southeast of Lex- 

 ington, Kentucky. 

 Fig. 15. Car'neyclla cincinnatiensis Bassler 7 



Diagrammatic sketch of theca, slightly enlarged, showing generic 

 characters of Carmyella. (after Hall). 



Cincinnatian (Maysville-Corryville) : Cincinnati, Ohio. 



Plate 3 



Fig, I. Heniicystites (Lebctodisctis) yoiuigi (Raymond) 12 



Photograph, X 3, of the holotype showing the broad, short ambu- 

 lacra, and rather large interambulacral plates. 

 Middle Trenton : Eldon township, Victoria County, Ontario. 



Fig. 2. Hcmicystitcs {Agelacrinus) billingsi (Chapman) 12 



View of the plesiotype figures by Raymond, X 3- The very large 

 interambulacral plates and the pitted surface are characteristic. 

 Trenton (Cystid beds) : Peterborough, Ontario. 



