42 BULLETIN 82, UNITED STATES NATIONAL MUSEUM. 



Series IV. Three distichals, the first two articulated, and the third axillary 



with a syzygy. 



Tridistichate species with a pinnule on the first brachial and a syzygy in 

 the second. The palmar and post-palmar series, when present, con- 

 sist of two joints, the first bearing a pinnule, and the second axillary 

 with a syzygy 7. " Fimbriata group." 



Tridistichate species, with a pinnule on the second brachial and a syzygy 



in the third 8. "Parvifirra group." 



The following species of comatulids were considered as valid by Carpenter, 

 and were included by him in the Challenger report: 



THAUMATOCBINUS. 

 Thaumatocrinus renovatus Thaumatocrinus renovatus. 



ATELECBINUS. 



Atelecrinus balanoides Atelecrinus balanoides. 



Atelecrinus wyvillii Atelecrinus wyvillii. 



Atelecrinus cubensis Atelecrinus balanoides. 



EUDIOCRINUS. 



Eudiocrinus indivisus Eudiocrinus indivisus. 



Eudiocrinus varians Pentametrocrinus varians. 



Eudiocrinus semperi Pentametrocrinus semperi. 



_ ,. . . . (Pentametrocrinus japonicus. 



Eudwcnnus mpomcus ( . . , 



{Pentametrocnnus luberculatus. 



Eudiocrinus atlanticus Pentametrocrinus atlanticus. 



ANTEDON. 

 SERIES I. 



Antedon fluctuans Zygometra elegans. 



Antedon multiradiata Zygometra microdiscus. 



Antedon microdiscus Zygometra microdiscus. 



SERIES II. 



" Basicurva group." 



Antedon longicirra Asterometra longicirra. 



Antedon valida Aglaometra valida. 



Antedon incerta Aglaometra incerta. 



Antedon gracilis Thalassometra pergracilis 



Antedon lusitanica Thalassometra lusitanica. 



Antedon breviradia Stiremetra breviradia. 



Antedon spinicirra Stiremetra spinicirra. 



Antedon acutiradia Stiremetra aculiradia. 



Antedon bispinosa Thalassometra bispinosa. 



Antedon latipinna Thalassometra latipinna. 



Antedon multispina Thalassometra multispina. 



Antedon echinata Thalassometra echinata. 



Antedon basicurva Charitometra basicurva. 



Anledon. incisa Charitometra incisa. 



Antedon tuberosa Glyptometra tuberosa. 



