40 BULLETIN 82, UNITED STATES NATIONAL MUSEUM. 



raltar, mainly based upon the results of the work of the Porcupine expedition, and 

 he also finished the monograph on the stalked crinoids which had been obtained by 

 the Challenger. This latter is much more comprehensive in scope than is indicated 

 by its title, for it includes a valuable discussion of the morphology both of the coma- 

 tulids and of the stalked species. 



In 1S85 Bell published a Ust of the Australian crinoids which had been sent to 

 the International Fisheries Exhibition in London. This list was published hi New 

 South Wales, and was the first contribution to the study of the recent crinoids, 

 properly identified as such, to be printed in Australia. 



Bell hi 1887 reported upon a collection of echinoderms from the Andaman 

 Islands, which included a single crinoid; this he refrained from naming, as the same 

 species also occurred in a collection from the Mergui Archipelago that had been 

 assigned to Carpenter for report. Carpenter later called it Antedon andersoni 

 (Pontiometra andersoni) . 



In the year 1888 the great Challenger report was published, which, though 

 based upon the Challenger collections, amounts to a complete and thorough mono- 

 graph of the group; this work brought the knowledge of the comatulids up to date, 

 and has ever since served as a foundation upon which authors have built. 



The following classification of the comatulids was adopted by Carpenter in 

 this volume: 



"I. Crinoids with the calyx closed below by the enlarged top joint of the larval stem, which 

 develops cirri and generally separates from the stem joints below it, so that the calyx is free. The 

 basals may form a more or less complete ring on the exterior of the calyx, or be only represented by an 

 internal rosette. Five or ten rays, either simple or more or less divided. The first axillary is the 

 second, or (very rarely) the first, joint above the calyx-radials. Definite interradial plates usually 

 absent. The mouth central, except in one genus. 



Family Comatulidx d'Orbigny. 



A. Centro-dorsal has no articular facet on its lower surface. 



a. Five rays. 



i. Mouth central or subcentral. Oral pinnules have no comb. 



Radials separated by interradials 1. Thaumatocrinus. 



Radials united laterally. 



1. Basals persist as a closed ring. No pinnules on lower 



brachials 2. Atelecrinus. 



2. Basal ring incomplete or invisible externally. 



I. Five arms only 3. Eudiocrinus. 



II. Ten arms 4. Antedon. 



ii. Mouth excentric or marginal. Oral pinnules have a terminal comb. 5. Actinometra. 



b. Ten rays 6. Promachocrinus. 



B. Centro-dorsal has an articular facet below 7. Thiolliericrinus." 



These genera contained hi all 188 recent species, divided among them as follows: 



Thaumatocrinus 1 



Atelecrinus 3 



Eudiocrinus 5 



Antedon 122 



Actinometra 54 



Promachocrinus 3 



( Thiolliericrinus 1) 



