Dec, 1920] Cystids and Blastoids 11 



Fig. 9. Gomphocystites bownockeri Sp. nov. 



A, Lateral view, showing anal aperture, with the left posterior ray along 

 the upper margin of the figure, the right posterior and right anterior rays occurring 

 at successively lowtr parts of the theca. B, Viewed from above, with anal 

 aperture slightly above and toward the left of the oral aperture. From the 

 Cedarville dolomite at Cedarville, Ohio. 



PLATE in. 



Fig. 1. Gomphocystites bownockeri Sp. nov. 



A, Lateral view of an imperfect specimen showing two of the five food-grooves 

 encircling the upper part of the theca in a dextral direction; the lower of these in 

 the figure is the left anterior food-groove; and the upper one is the anterior food- 

 groove. On the right half of the theca, near midheight of the more globose part, 

 is an approximately horizontal series of small plates connecting on the right with 

 the tip of the left "posterior food-groove. B, Oblique view of the same specimen 

 showing the two food-grooves mentioned before, above which, in succession, are 

 the right anterior food-groove, and the right posterior one, the latter curving 

 toward the right, close to the left margin of the anal opening, as seen from the 

 point of view of the figure. The pentagonal depression containing the oral aperture 

 is best seen in Figure B. From the Cedarville dolomite at Cedarville, Ohio. 

 No. 8736 in the Museum of Ohio State University. 



Fig. 2. Gomphocystites sp. 



A, Lateral view, showing in succession, from below upward, the left posterior, 

 left anterior, and anterior food-grooves, with a faint view of the right anterior 

 food-groove at the extreme top of the figure. B, View from above, showing four 

 of the food-grooves, the right posterior one curving downward on the right side of 

 the anal aperture, in the figure; then follow in succession the right anterior, anterior 

 and left anterior food-grooves, with the proximal part of the left posterior one 

 indicated on the left side of the right posterior food-groove. The proximal parts 

 of the two posterior food-grooves are not distinctly preserved in the specimen 

 figured and are added here to assist in orienting the specimen. From the base of 

 the Louisville limestone, two miles east of Anchorage, Kentucky. 



Fig. 3. Troostocrinus subcylindricus (Hall and Whitfield). 



A, Type, with the right posterior radial on the left side of the figure. B, 

 Lower half of a theca, with the left anterior radial in the center of the figure. 

 C, Theca with the right posterior radial in the center of the figure. In B and C 

 the truncated basals are angulated along their median lines. From the Cedarville 

 dolomite. A, B, from Yellow Springs, Ohio, are numbered 3306 in the Museum of 

 Ohio State University. C, from Cedarville, Ohio. 



Fig. 4. Periechocrinus cylindricus Foerste. 



Calyx, slightly swollen just beneath the right anterior (RA), right posterior 

 (RP), and left posterior (LP) groups of arms. From the Cedarville dolomite, at 

 Springfield, Ohio. In the Museum of Wittenberg College, at Springfield, Ohio. 



Fig. 5. Ccelocystis subglobosus (Hall). 



Plate diagram of specimen numbered 1603, in the Illinois State Museum of 

 Natural History, in Springfield, Illinois; from the Racine dolomite at Racine, 

 Wisconsin. 



Fig. 6. Ccelocystis subglobosus (Hall). 



Plate diagram of type, numbered 2027 in the American Museum of Natural 

 History in New York City; from the Racine dolomite at Racine, Wisconsin. The 

 dotted lines indicate the parts not distinctly defined in this type. 



