130 CLARK : CRINOID FAMILY ANTEDONIDAE 



Geographical Range.— Known only from the western coast of Ireland. 

 Bathymetrical Range.— From 698 to 900 meters. 

 Included Species.— Orthometr a hibernica (A. H. Clark). 



Tonrometra, gen. no v. 



Genotype— Antedon remota P. H. Carpenter, 1888. 



hiagnosis.—The cirrus, segments, which are not more than 20 in 

 number, are all short, the longest being not so much as twice as long 

 as the median diameter, and have much swollen distal ends; the IBr 

 series and lower brachials are in close lateral contact. 



Geographical Range.— Moluccas to Marion Island, southeast of 



A TIM / "| 



Bathymetrical Range.— From 1089 to 2880 meters. 

 Included Species.— Tonrometra brevipes (A. H. Clark) and Tonro- 

 metra remota (P. H. Carpenter). 



Fariometra, gen. nov. 



Genotype. — Trichometra explicata A. H. Clark, 1908. 



Diagnosis. — The centrodorsal is sharply conical with straight sides, 

 nearly or quite as high as broad at the base; the proximal cirrus seg- 

 ments are elongated, at least twice as long as the median diameter and 

 usually much longer. 



Geographical Range. — Philippine Islands to Celebes. 



Bathymetrical Range. — From 509 to 1314 meters. 



Included Species. — Fariometra explicata (A. H. Clark), Fariometra 

 scutifera A. H. Clark, and Fariometra dione A. H. Clark. 



Nepiometra, gen. nov. 



Genotype. — Antedon laevis P. H. Carpenter, 1888. 



Diagnosis. — The centrodorsal is rounded conical or hemispherical, 

 not so high as broad at the base; the proximal cirrus segments are 

 elongated, at least twice as long as the median diameter, and usually 

 much longer; the brachials do not have strongly produced and very 

 spinous distal (mils; at most the distal edges of the outer brachials are 

 bordered with fine spines; the cirri have 20-30 relatively short seg- 

 ments of which the last 6-13 are only very slightly, if at all, longer than 

 broad; the pinnules are not especially long, and the distal pinnules are 

 of the same length as the proximal; P2 resembles P3 and the following 

 pinnules and is slightly longer and stouter than Pi with somewhat 

 fewer segments which are proportionately longer; P 2 may bear a gonad, 

 though these usually begin on P 3 ; the arms are between 25 mm. and 

 <>() mm. in length. 



Geographical Range. — Kei and Meangis Islands and southern Celebes; 

 ? ( lalapagos Islands and Panama. 



Bathymetrical Range. — From 204 to 1158 (?1760) meters. 



Included Species. — Nepiometra obscura (A. H. Clark), Nepiometra 

 alcyon (A. H. Clark), Nepiometra laevis (P. H. Carpenter), Nepiometra 

 io (A. H. Clark), and Nepiometra (?) parvula (Hartlaub). 



