40 BULLETIN 82, UNITED STATES NATIONAL MUSEUM. 



raltiir. nmmly based upon tlie results of the work of the Porcupine expedition, and 

 ho also finished the monograph on the stalked crmoids wliich had been obtained by 

 the Challingrr. This latter is niucli more comprcliensivo in scope than is indicated 

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

 tulids and of the stalked species. 



In 1S85 Boll published a lust of the Australian crinoids which had been sent to 

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

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

 properly identified as such, to be printed hi Australia. 



Bell ui 18S7 reportinl ui)on a collection of echuiodcrnis from the Andaman 

 Islands, which included a single crinoid; this ho refrained from nammg, as the same 

 species also occurred in a collection from the IMei^ui Archipelago that had been 

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

 (Pontiometra andersoni). 



In the year 1S8S 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 wliich authors have built. 



The foliowdng classification of the comatulids was adopted by Carpenter in 



this volume: 



"I. Crinoids ivith the calyx closed below by the enlarged top joint of the lar\'al 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, cither simple or more or less divided. The first axillary is the 

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

 absent. The mouth central, except in one genua. 



Family Comatulidx d'Orbigny. 



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



a. Five rays. 



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



Radials separated by interradials 1. Thaumatocrinus. 



Radiala united laterally. 



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



brachials 2. Atelecrimts. 



2. Uasal 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. Thiollicricrinus." 



These genera contained in all 188 recent species, divided among them as foUo'ws: 



Thaumatocrinus 1 



Atctecrinus 3 



Eudiocrinus 5 



Antedon 122 



ActinometTa 54 



Promachocrinus 3 



( Thiollicricrinus 1) 



