BATOCRINID^. 



2. Basah four. 



Dorsal cup similar to that of Megistocrinus ; 

 arms heavy, flattened on the back. . . 



363 



Abacocrinus 



Geological and Geographical Distribution. 



Number of known species. 



(Open figures indicate American ; those marked ( ), European.) 



i 



o 



a 



CD 

 O 







BATocRmn)^. 





Batocrinites. 



Periecho- 

 crinites. 



American. 



Approximate 



European 

 Equivalents. 



1 



o 



s 



1 



1 

 g 

 a. 



< 





i 



1 

 1 



3 

 1 



1 

 a 

 H 



1 

 3 



3 

 P 



•a 



to 



S 



5 



14 

 3 



i 

 § 



pq 



D 



!_ 



1 



2 

 3 



4 



1 

 (3) 



3 



a 

 "E 

 a 



o 

 fi 



2 



5 

 3 



c 



■n 



o 

 'E 



bo 

 <5 



10 



8 

 4 



22 



d 

 o 



2 

 2 



3 



i 



(19) 

 (19) 



d 



§ 

 ft 



(4) 

 4) 



P 



o 



£ 



o 

 O 



2 

 2 



s 

 .S 



'E 

 o 



1 



1 

 I 



1 



8 

 (16) 



11 

 (16) 



o 

 a 

 'a 



1 



i 



1 

 (1) 



1 

 1 



9 



12 



(1) 



« 



p 

 a 



o 



a 



a 



a 



O 



2 

 2 



(6) 

 6) 



g 

 .■§ 



o 



1 



Warsaw. 





2 





Keokuk. 



o 



g 



a 

 '3 



a 

 o 



3 



3 

 9 



2 



4 

 9 

 6 



1 



4 

 4 

 2 



Up. Burlington. 



Low. Burlington. 



Kinderhook. 



Waverly. 



Chouteau. 



i 



1 

 p 



i 



d 



Hamilton. 



















Up. Helderberg. 



Eifel. 

















Niagara. 



Wenlock. 

 Gotland. 



— 



— 





— 



— 



— 



— 



(1) 

 (1) 



11 



[3) 



10 



Hudson River. 





Total species 203 | Am 



19 



19 



1 



10 



6 



4 



22 



Bemarks. — The Batocrinidse and Actinocrinidse differ from the two 

 preceding monocyclic families, Melocrinidse and Calyptocrinidse, in having a 

 large anal plate separating the two posterior radials and resting upon the 

 basals; and as a consequence of this a hexagonal base, which is composed 



