42 BULLETIN 82, UNITED STATES NATIONAL MUSEUM. 



Seriee 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 aeries, when present, con- 

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

 with a syzygy 7. "Fimbriaia group." 



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



in the third 8. "Parvicirra group." 



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

 and were included by him in the Cliallenger report: 



THAU^UTOCRINUS. 

 Thaumatocrinus renovalus Thaumatocrinus renovatus. 



ATELECRINUS. 



Atelecnnus balanoides AteUcrinus halanoides. 



AUUcrinxts wyvillii Atelecnnus icyviUii. 



AteUcrinus cubensis Atelecnnus halanoides. 



EUDIOCRINUS. 



Eudiocrinus indivisus Eudiocrinus indivUus. 



Eudiocrinus x'arians Pentametrocrinus varians. 



Eudiocrinus semperi rentamctrocrinus semperi. 



_ ,. . . . (Pentametrocrinus japonicus. 



Eudwcnnus laponuMS \ ,, , , . . , , , 



•' '^ yPentametrocnnus tuberculatus. 



Eudiocrinus athnticus Pentametrocrinus atlanticus. 



ANTEDON. 

 Series I. 



Antedon fiucluans Zygomelra elcgans. 



Antedon muUiradiata Zygomctra microdiscus . 



Antedon microdiscus Zygometra microdiscus. 



Series II. 



" Basicurva group. ' ' 



Antedon longicirra Asterometra longicirra. 



Antedon valida Aglaometra ralida. 



Antedon incerta Aglaometra inccrta. 



Antedon gracilis Thalassometra pergracilis 



Antedon lusilanica 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. 



AnUdon echinata Thalassometra echinata. 



Antedon basicurva Charilometra basicurva. 



Antedon incisa Charitometra incisa. 



Antedon tuberota Glyptometra tuberosa. 



