A MONOGRAPH OF THE EXISTING CRINOIDS 73 



thus tirnorensis type IV. (71) Comaster gracilis type II. (72) Comaster multibrachiata 

 type. (73) Comantheria delicata type. (74) Zygometra microdiscus type I. (75) 

 Comanthus pinguis type. (76) Comanthus bennetti type. (77) Comantheria polycnemis 

 type. (78) Comantheria intermedia type. (79) Comantheria alternans type. (80) 

 Comanthina belli type. (81) Zygometra microdiscus (elegans) type II. (82) Coman- 

 theria briareus type. (83) Himerometra magnipinna type. (84) Comanthina 

 schlegelii type. (85) Capillaster sentosa type. 



EXTENT OF THE DISK 



Gislen says that the disk in Clarkometra elegans reaches to brachials 3+4; in 

 Tropiometra afra macrodiscus and in Antedon petasus to brachials 4 or 5 ; in Leptone- 

 master venustus to brachial 5; in Promachocrinus to brachial 6; in Notocrinus to 

 brachial 7; in Pentametrocrinus diomedeae to brachials (5-) 8; in Heterometra crenulata 

 and Amphimetra jacguinoti to brachial 6 ; in Heliometra and Anthometra to brachials 

 7-8 ; in Atopocrinus to brachial 9 ; in Comanthus pinguis only to the second or fourth 

 element in the IIIBr series; and in Comaster novaeguineae only to the third or fourth 

 element in the IIBr series. 



208244 — 40- 



