272 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



The disk is completely covered with a pavement of small plates. The brachial and 

 pinnule ambulacra are well plated, and there are large irregular plates over the gonads. 



The color in life is yellow. 



Localities. — Albatross station 5236; east coast of Mindanao, north of Lianza Bay; 

 Magabao Island (S.) bearing N. 85° W., 9.10 miles distant (lat. 8°50'45" N., long. 

 126°26'52" E.); 903 meters; bottom temperature 5.11° C; fine gray sand; May 11, 



1908 [A. H. Clark, 1909, 1912, 1918] (3, U.S.N.M., 25464 [type], 35688). 



Albatross station 5349; Palawan Passage; Point Tabonan bearing N. 85° E., 42.5 

 miles distant (lat. 10°54'00" N., long. 118°26'20" E.); 1,334 meters; bottom tempera- 

 ture 4.83° C; coral sand; December 27, 1908 (4, U.S.N.M., 35956). 



Albatross station 5367; Verde Island Passage; Malabrigo Light bearing N. 81° E., 

 8 miles distant (lat. 13°34'37" N., long. 121°07'30" E.); 329 meters; sand; February 

 22, 1909 (1, U.S.N. M., 35896). 



Geographical range. — Philippine Islands. 



Bathymetrical range. — From 329 to 1,334 meters. 



Thermal range.— From 4.83° to 5.11° C. 



History. — This species was described under the name of Pachylometra levigata in 



1909 from a specimen from Albatross station 5236. In my memoir on the crinoids of 

 the Indian Ocean published in 1912 Pachylometra levigata was listed and the range 

 and synonymy were given. In my report on the unstalked crinoids of the Siboga 

 Expedition published in 1918 levigata was included in the key to the species of Pachylo- 

 metra and the synonymy and range were given. 



GLYPTOMETRA LATA (A. H. Clark) 



Plate 28, Figures 84-86; Plate 29, Figure 88 

 [See also vol. 1, pt. 2, figs. 306, p. 223, 658, p. 329.] 



Antedon lata A. H. Clark, Proc. U. S. Nat. Mus., vol. 33, 1907, p. 140 (description; Albatross station 



4918). 

 Charitometra lata A. H. Clark, Smithsonian Misc. Coll., vol. 50, pt. 3, 1907, p. 361 (listed) ; Proc. U. S. 



Nat. Mus., vol. 34, 1908, p. 228 (compared with Ch. [Calyptometra] lateralis) , p. 312 (Sagami Bay, 



Japan) . 

 Glyplometra lata A. H. Clark, Proc. Biol. Soc. Washington, vol. 22, 1909, p. 19 (listed); vol. 25, 1912, 



p. 80 (compared with G. [Pcrissometra] timorensis) ; Crinoids of the Indian Ocean, 1912, p. 224 



(synonymy; locality); Journ. Washington Acad. Sci., vol. 5, No. 6, 1915, p. 215 (southern Japanese 



species; range and its significance). 

 PerUsomelra lata A. H. Clark, Journ. Washington Acad. Sci., vol. 6, No. 17, 1916, p. 607 (listed); 



Unstalked crinoids of the Siboga-Exped., 1918, p. ix (relationship with P. timorensis), p. 177 (in 



key; range), p. 182 (references). — Gislen, Nova Acta Reg. Soc. Sci. Upsalicnsis, ser. 4, vol. 5, 



No. 6, 1922, p. 121 (compared with P. aranea); Vid. Medd. Dansk Nat. Foren. K0benhavn, vol. 



83, 1927, p. 35; Ark. Zool., vol. 19, No. 32, Feb. 20, 1928, p. 8. 



Diagnostic features. — The cirri, which are arranged in 15 columns on the centrodor- 

 sal, arc up to 25 mm. in length and are composed of 15-1 S segments, of which the earlier 

 are longer than broad and the distal are about as long as broad or broader than long; 

 the 10 arms are 115-130 mm. long; and the IBr scries and lower brachials are coarsely 

 rugose, but their borders are not everted. 



Description. — The centrodorsal is a thick disk with the baro polar area moderate 

 or large and coarsely tubercular. The cirrus sockets are arranged in one and a more or 



