Tat 
BATOCRINID&. 363 
2. Basals four. 
Dorsal cup similar to that of Megistocrinus ; 
arms heavy, flattened on the back. . Abacocrinus 
i] 
Geological and Geographical Distribution. 
Number of known species. 
(Open figures indicate American; those marked ( ), Huropean.) 
BATOCRINID Be 
FORMATION. argh : 
Batocrinites. Periecho- 
crinites. 
= g 
3 re al g F a 5 St See a 
S ee Weceprec es oe ede ee | ab) 2 aa 
eee | eS Se) Se ad See) See Se eat ea eames as 
C | Americn, | SES |RSS SSI S/ eel S/2/ 48 [S/S 8 /e/ 8/4 
SSSIEPSIS ELSISi STE RIelS Sl Slelet se leleis 
aS 1S) 8} BS) 23) | so | 2 |S eae OOF laa SS ean 
oP sl slSlB/ 2/8/8181 8/8) 8/8/42 Al els |Blel2 
BIR ISH I/SIRIAIAIS/AIS |S} 8 le lO]]e /alol= 
Warsaw. 2 1 5 
4 |Keokuk. Seeds Se) oa fers fad ef] Tee) 
5 3 pent Oleg 
A q 
|p S l 
2 Up. Burlington. 2 3 | 9 4/3/31] 38 21048 l (1) 
2 E ee ae oS 
cS 4 
(>) ° 
‘Q |Low. Burlington. a 9 | 6 i ea 3|3|4 hat 
wa s 
| | a SN —— Pare — |. 
= 
Kinderhook. Ss 
Waverly. = 2 4 Beet 
Chouteau. 
& |Hamilton. 1 9 | 2 
a a ule pen eet ill aeons 
a BENS | PA ts. a Mn ea 
® 
Q | Up. Helderberg. |EHifel. (3) 
: : Wenlock. = ‘ 8 
= MOIEEne Gotland. (1) 2 |(19) 1(4) (16) (6) 
5 ae: fetes pate lakes bikes Rh Lh 
*% | Hudson River. 2 
Total s ecies 203 } 1538/19/19], 1) 10) 6 | 4 | 22 AL) 10} 22) 2 Se teelpleg 2s a2 
ee (50) (1) |(8) (19))(4) (16) \(1)} — |(6) 
Remarks. —The Batocrinide and Actinocrinide differ from the two 
preceding monocyclic families, Melocrinide and Calyptocrinide, 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 
