20 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 6l 



twenty-one arms ; the ten IIBr series are 2 ; the single IIIBr series, 

 which is internally developed, is 4 (3 + 4) ; there are four cirri. 



26. Macclesfield Bank; 13 fathoms. — Two specimens; the larger 

 has twenty arms. 



27. Macclesfield Bank; 13-36 fathoms. — One specimen with about 

 thirty arms ; there are V cirri. 



28. Macclesfield Bank; 26 fathoms. — One small specimen with 

 fourteen arms. 



29. Macclesfield Bank; 20-35 fathoms. — One specimen with 

 thirteen arms. 



30. Frcmantle, Western Australia.- — One specimen. 



31. Seychelles; 34 fathoms. — Two specimens; one of these is 

 typical, with twenty arms and four cirri ; the other is a small indi- 

 vidual. 



32. No Locality. — One specimen. 



33. Mauritius. — Two small specimens, with thirteen and fourteen 

 arms respectively, very close to, if not, C. parvicirra. 



Family ZYGOMETRIDJE A. H. Clark 



Genus ZYGOMETRA A. H. Clark 



ZYGOMETRA MICRODISCUS (Bell) 



Antedon microdiscus 1884. Bell, "Alert" Report, p. 163 (1, 2). 



Antedon multiradiata 1888. P. H. Carpenter, "Challenger" Report, Co- 



matulse, p. 96 (4).— Brit. Mus., MS. (s, 8, 11). 

 Antedon variipinna Brit. Mus., MS. (3). 

 Antedon macronema Brit. Mus., MS. (10). 



1. Port Molle, Queensland ; 12 fathoms. — In this, the type speci- 

 men, the disk is just beginning to regenerate. The enormously long 

 proximal pinnules, which recall those of such species of Himero- 

 metra as H. bartschi, and the very long cirri, which are from 40 mm. 

 to 45 mm. in length, are the characteristic features of the species. 



2. Nicol Bay, northwestern Australia. — Two specimens. 



3. Albany Island; "Alert/' — One specimen. 



4. "Challenger" Station Xo. iSj. — These two specimens, the 

 types of Carpenter's Antedon multiradiata, are in reality small 

 examples of this form. 



5. II olothuria Bank. — One fine specimen. 



6. Northwestern Australia. — One broken specimen with about 

 forty arms. 



7. Torres Strait; 10 fathoms; sand. — One specimen. 



8. Lewis Island, Dampier Archipelago, Western Australia. — One 

 specimen. 



