46 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 6 1 



are arranged in ten columns, the two in each radial area separated 

 from each other by furrows. 



2. Station No. 12792. — One specimen. 



CROTALOMETRA PORRECTA (P. H. Carpenter) 



Antedon porrccta 1888. P. H. Carpenter, " Challenger " Report, Comatulae, 

 p. 250 (1). 



I. "Challenger" Station No. 344. — One large and two small 

 specimens ; in the former the cirri are XIV, 50 mm. to 54 mm. long ; 

 the eighth or ninth is a transition segment. This species is remark- 

 able for the great size and stoutness of its cirri. 



Genus THALOSSOMETRA A. H. Clark 



THALASSOMETRA LUSITANICA (P. H. Carpenter) 



Antedon lusitanica 1884. P. H. Carpenter, Proc. Roy. Soc. Edinburgh, vol. 

 12, p. 368 (1). — 1888. P. H. Carpenter, " Challenger" Report, Comatu- 

 lae, p. 109 (1). 



I. "Porcupine" Station ija; 1870. — Three specimens, agreeing 

 with the published figures. 



THALASSOMETRA LATIPINNA (P. H. Carpenter) 



Antedon latipinna 1888. P. H. Carpenter, " Challenger " Report, Comatulae, 

 p. 116 (1). 



I. "Challenger" Station No. 232. — One specimen; the edges of 

 the ossicles of the I Br series are finely spinous ; the brachials as far 

 as they are preserved are finely spinous on the dorsal surface. 



THALASSOMETRA ECHINATA (P. H. Carpenter) 



Antedon echinata 1888. P. H. Carpenter, " Challenger " Report, Comatulae, 

 p. 119 (1). 



I. "Challenger" Station No. 170. — One small specimen. 



THALASSOMETRA PERGRACILIS A. H. Clark 





Antedon gracilis 1888. P. H. Carpenter, " Challenger " Report, Comatulae, 

 p. 107 (1). 



I. "Challenger" Station No. 214. — Four specimens; this is a 

 slender species, about the build of Th. attenuata though more robust 

 basally. 





