496 



PAL^ONTOLOGICAL REPORT OF GEOLOGIC iL SURVEY. 



PLATE II. 



PENTREMITES OBESUS. Lyon. 

 Volume 3, 'page 469. 

 Fig. 1. Basal view. 



Fig. la. View of the summit, same specimen. 

 Fig. lb. Profile view, same specimen. 

 Fig. lc. Basal pieces. 



Fig. Id. -Fragment showing the interradial pieces, drawn the size of nature. 

 Fig. le. Generic figure, reduced one diameter — 



1. Basal pieces. 2. First radial pieces. 3. second radial pieces. 



4. Third radial pieces. 6. Interradial pieces. 6. Pseudambulacral 



fields. 



PLATE III. 



ASTEROCRINTTS CAPITALIS. Lyon. 

 Volume 3, -page 472. 

 Fig. 1. Profile view, (all the figures are the size of nature.) 

 Fig. la. View of one of the club-like lobes, presenting its smallest surface. 

 Fig. lb. View of same part, presenting its greatest surface. 

 Fig. lc. View of the summit. 

 Fig. Id. Basal view. 

 Fig. le. Generic figure — 



1. Basal pieces. 2. Radial pieces. 2a. Anal piece. 3. Secondary 



radials. ' 

 Fig. If. End view of the base, anal side presented. 

 Fig. Ig. External view of the base. 

 Fig. lh. Internal view of the base. 

 Fig. li. End of the base, opposite the anal side, 

 FrG. Ik. End view of the base, showing the long diameter. 



PLATE IV. 



ACTINOCRINUS ABN0RMI8. Lyon. 

 Volume 3, page 479. 

 Fig. 1. Profile view, natural size. 

 Fig. la. Basal view, same specimen. 



Fig. lb. Generic view, extended from the anal pieces to the knob at the center o 

 the summit. 



