ClarJi — A Revision of the Crinoid Family MariametruJss. 1 13 



The genera which collectively form the family Mariametridae, 

 with the original references, the genotypes, the geographical 

 and bathymetrical ranges, and the named species included in 

 them, are the following: 



1. Pontiometra A. II. Clark. 



Pontiorm tr<< 1907. A. H. Clark, Smiths. Miscell. Cell. (Quarterly Issue). 

 Vol. 50, ]>. 354. 



Genotype. Antedon andersoni I'. II. Carpenter, 1889. 



Range. — From the Mergui Archipelago ami the Andaman Islands 

 eastward to the Moluccas, New Caledonia, the Pelew Islands and the 

 Philippines. 



Depth.— 0-24 fathoms. 



Nominal Species included in tin Genus. — Andersoni, insperatus and 

 polypus. 



■J. Oxymetra A. II. Clark. 

 Oxymetra 1909. A. II. Clark, Proc. Biol. Soc. Wash., Vol. 22, p. ]:'.. 



Genotype.. — Antedon erinacea Hartlauh, L890. 



Range. — From the Andaman Islands eastward to New Britain and the 

 Philippine Islands. 



Depth.— 0-42 fathoms. 



Nominal Species included in. tin Genus. — Aranea, erinncea, finschii, 

 gracilipes, tenuicirra and viridis. 



'!. Liparometra yen. nov. 



Diagnosis.— A genus of Mariarnetridse in which the cirri are of mode- 

 rate length and consist of ]es< than 40 segments, and 1\< and Ps are of 

 equal length, longer than Pi and P-i, rather slender, and flagellate. 



<ii notype. — Himerometra grandis A. H. Clark, 1908. 



Range.— From Queensland and the Moluccas to the Tonya Islands, and 

 northward to southwestern Japan. 



]>> pth. —0-40 fathoms. 



Nominal Species included in tin- Genus. — Articulata, grandis and regalis. 



4. Lamprometra gen. nov. 



Diagnosis. — A genus of Mariarnetridse in which the cirri are of mode- 

 rate length or short, composed of less than 4(i segments, with the outer 

 segments furnished with a median dorsal keel or slight dorsal tubercles, 

 and Pj is markedly longer and stouter than I';, and also longer and 

 stouter than Pi. 



Genotype. — Antedon imparipinna P. II. Carpenter, 1882. 



Range. — From the Red Sea eastward to and throughout the East Indies. 

 reaching Australia, New Caledonia, the Solomon Islands, Samoa, Tonga, 

 Fiji, the Philippine Islands, the .Marshall Islands, the Caroline Islands, 

 the Hawaiian Islands and Hong Kong. 



Depth.— C)-2n ( ?36) fathoms. 



