680 



BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



VOLUME 1 



mm 



FIGURE 39. Nepiometra laevis (P. 

 H. Carpenter), holotype: a, 

 Parts of two postradial series; 

 b, diagonal view of lateral angles 

 of two adjacent axillaries. 



are relatively longer and narrower than those of the first two pinnules but are still 

 cylindrical in shape with only the slightest trace of flared ends on some of the very long 

 outer segments. The gonads are undeveloped but there appears to be an incipient 

 one on P 3 . 



Locality. Challenger station 214; off the Meangis Islands, south of Mindanao, 

 Philippines (lat. 433' N., long. 12706' E.); 914 meters; temperature 5.44 C.; blue 

 mud; February 10, 1875 [P. H. Carpenter, 1888; A. H. Clark, 1913] (1, B.M.). 



Genus ORTHOMETRA A. H. Clark 



Trichometra (part) A. H. CLARK, Fisheries, Ireland, Sci. Invest., 1913, pt. 4, p. 2. 



Orthometra A. H. CLARK, Journ. Washington Acad. Sci., vol. 7, 1917, No. 5, p. 128 (referred to the 

 Bathymetrinae) , p. 129 (diagnosis; type species Trichometra hibernica A. H. Clark, 1913), p. 130 

 (range; included species); No. 16, p. 510 (in key; range); Unstalked crinoidsofthe Siboga-Exped., 

 1918, p. 244 (in key; range), p. 258; The Danish Ingolf-Exped., vol. 4, No. 5, Crinoidea, 1923, 

 p. 42 (range), p. 53 (in key).- MORTENSEN, Handbook of the echinoderms of the British Isles, 

 1927, p. 26 (in key), p. 38 (diagnosis). GISLEN, Vid. Medd. Nat. Foren. K0benhavn, vol. 83, 

 1927, p. 6; Rep. Swedish Deep Sea Exped., vol. 2, Zool., No. 4, 1951, p. 55. 



Diagnosis. A genus of Bathymetrinae in which the cirri are composed of numerous 

 (25 to 33) segments, of which the longest are but slightly longer than broad and only 

 slightly constricted centrally without overlapping distal ends and the distal are broader 

 than long; the IBri have converging sides and are not in contact; and PI has less than 

 20 segments, of which not more than 2 or 3 are as broad as long. 



Type species. Trichometra hibernica A. H. Clark, 1913. 



Geographical range. From the Bay of Biscay to western Ireland and thence to 

 south of the Faroes. 



Bathymetrical range. From 698 to 997 meters. 



Thermal range. One record, 4.8 C. 



ORTHOMETRA HIBERNICA (A. H. Clark) 



Trichomelra hibernica A. H. CLARK, Fisheries, Ireland, Sci. Invest., 1913, pt. 4, p. 2 (description; 

 discussion; Helga sta. S.R. 151), p. 3 (sta. 223). LE DANOIS, Les profundeurs de la mer, Paris, 

 1948, p. 245. 



