NO. 15 RECENT CRINOIDS IN BRITISH MUSEUM — CLARK 69 



Genus METACRINUS P. H. Carpenter 



METACRINUS ROTUNDUS (P. H. Carpenter) 



Metacrinus rotundus 1884. P. H. Carpenter, "Challenger" Report, 

 Stalked Crinoids, p. 344 (i). — [885. P. H. Carpenter, Trans. Linn. 

 Soc. (Zool.), (2), vol. 2, p. 436 (1). 



i. Japan; jo fathoms. — One specimen. 



Family HOLOPID^ 



Genus HOLOPUS d'Orbigny 



HOLOPUS RANGII d'Orbigny 



Holopus rawsoni 1870. Gray, Ann. and Alas. Nat. Hist. (4), vol. 8, p. 394 

 (1). 



Holopus rangi 1884. P. H. Carpenter, " Challenger " Report, Stalked Crin- 

 oids, p. 199 (1). 



i. Barbados; 5 fathoms; Sir Razvson Rawson. — Two specimens. 



UNIDENTIFIED SPECIMENS 



Family COMASTERID^ A. H. Clark 



COMASTER species 



i. Macclesfield Bank; 23-25 fathoms. — One specimen with fifteen 

 arms 55 mm. long; two IIIBr series are developed on two IIBr 

 series ; there is one additional IIBr series ; the cirri are VII, but 

 apparently will be lost when the animal is adult. 



2. Macclesfield Bank; 26 fathoms. — Two smaller specimens. 



Family MARIAMETRID^ A. H. Clark 



ANTEDON MOOREI Bell 



Ante don moorei 1894. Bell, Proc. Zool. Soc. London, 1894. P- 401 I 1 >. 



i. Macclesfield Bank; ij fathoms. — One specimen. The cirri are 

 XVIII, 21-25, I 7 mm - l° n g ! tne longest proximal segments arc about 

 one-third longer than broad ; the outer thirteen segments arc slightly 

 broader than long, and bear moderately developed dorsal spines. 



The thirty-two arms are 60 mm. long; the IIBr and IIIBr series, 

 which are both 2, are in close lateral apposition, and the lateral 

 borders of the component ossicles appear to be somewhat produced. 



P x is similar to P 2 , but not quite so long nor so stout, and it tapers 

 somewhat more rapidly. P, , which is the longest and largest pinnule 

 on the arm, is considerably larger on the outer arms arising from 

 each IBr axillary than on the inner ; it is long, enlarged, slightly stilt- 



