A MONOGRAPH OF THE EXISTING CRINOIDS 425 



Albatross station 5444; off the east coast of Luzon; Atalaya Point, Batag Island 

 bearingS. 65 E., 5.1 miles distant (lat. 1243'51" N., long. 12458'50" E.); 563 

 meters; bottom temperature 7.39 C.; green mud; June 3, 1939 (1, U. S. N. M., 

 35542). 



Albatross station 5179; in the vicinity of Romblon; Romblon Light bearing S. 

 56 E., 4.5 miles distant (lat. 1238'15" N., long. 12212'30" E.); 68 meters; 

 bottom temperature 24.28 C.; hard bottom; March 25, 1908 [A. H. Clark, 1908, 

 1909, 1912, 1915, 1918; Sieverts, 1932]. 



Albatross station 5414; between Cebu and Bohol; Lauis Point Light Bearing 

 N. 67 W., 9.5 miles distant (lat. 1010'40" N., long. 12402'45" E.); March 24, 

 1909 [A. H. Clark, 1911] (13, U.S.N.M., 35538, 35540, 35543-35551, 35553, 35554). 



Albatross station 5413; between Cebu and Bohol; Lauis Point Light bearing N. 

 68 W., 10 miles distant (lat. 1010'35" N., long. 12403'15" E.); 77 metars; coral 

 and sand; March 24, 1909 [A. H. Clark, 1911] (2, U.S.N.M., 35539, 35555). 



Albatross station 5356; North Balabac Strait; Balabac Light bearing S. 64 W., 

 15.5 miles distant (lat. 806'40" N., long. 11718'45" E.); 106 meters; sand and 

 shells; January 5, 1909 [A. H. Clark, 1911] (1, U.S.N.M., 35541). 



Albatross station 5 153; Tawi Taw group, Sulu (Jolo) Archipelago; Tocanhi Point 

 bearing S. 27 E., 2.1 miles distant (lat. 518'10" N., long. 12002'55" E.); 89 

 meters; coral sand and sheUs; February 19, 1908 [A. H. Clark, 1908, 1909, 1912, 1915, 

 1918; Sieverts, 1932] (1, U.S.N.M., 25447). 



Albatross station 5593; Sibuko Bay, Borneo; Mt. Putri (sea tangent), Borneo, 

 bearing N. 52 W., 17.2 miles distant (lat. 402'40" N., long. 11811'20" E.); 69 

 meters; fine sand; Sept. 29, 1909 [A. H. Clark, 1911] (1, U.S.N.M., 35552). 



Danish Expedition to the Kei Islands; Dr. Th. Mortensen; station 24; 100 meters; 

 hard bottom; April 15, 1922 (1). 



Note. The record from Albatross station 5444 is very dubious. The specimen 

 cataloged as from that station lacks the original label. It probably came from 

 station 5179 from which station no specimen is cataloged, but from which I recorded 

 the species in 1908. Station 5444 is disregarded in the following summary. 



Geographical range. From the Bonin and Philippine Islands southward to the 

 Kei Islands. 



Bathymetrical range. From 68 to 106 (possibly 183) meters. Dr. Bock's recoids 

 represent the length of hue out, not the actual depth. 



Thermal range.- One record, 24.28 C. 



History. This species was described in 1908 under the name of Ptilometra 

 trichopoda from a specimen dredged by the Albatross at station 5153 in the Philippines 

 earlier in the same year; at the same time it was recorded from station 5179. Ptilo- 

 metra trichopoda was made the type of the new genus Pterometra in 1909. 



In 1911 it was recorded from Albatross stations 5356 (1), 5413 (2), 5414 (16), 

 and 5593 (1), and notes were given on some of the specimens. 



In 1922 Prof. Torsten Gislen recorded and gave notes on specimens that had been 

 collected by Dr. Sixten Bock in the Bonin Islands at stations 45 (1), 48 (1), and 59 (5). 

 Professor Gisl6n discussed the structure and relationships of the species further in 

 1934 and 1936. 



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