PART 5 A MONOGRAPH OF THE EXISTING CRINOIDS 105 



Localities. Albatross station 51 78; Philippine Islands, in the vicinity of Romblon; 

 PortOrigon (N.) bearing S. 5 E., 2.3 miles distant (lat. 1243'00" N., long. 12206'15" 

 E.); H2 meters; fine sand; March 25, 1908 [A. H. Clark, 1909J (1, U.S.N.M., 25371). 

 Type locality. 



Albatross station 5483; in the vicinity of Surigao Strait, between Samar and Leyte; 

 Cabugan Grande Island (N.) bearing N. 88 W., 5.7 miles distant (lat. 1027'30" X., 

 long. 12519'15" E.); 135 meters; sand and broken shells; July 30, 1909 [A. H. Clark, 

 1911] (2, U.S.N.M., 36024). 



Albatross station 5152; Tawi Tawi group, Sulu (Jolo) archipelago; Pajumajan 

 Island (W.) bearing S. 2 W., 2 miles distant (lat, 522'55" N., long. 12015'45" E.); 

 62 meters; white sand; February 18, 1908 (1, U.S.N.M., 57656). 



Geographical range. Only known from the Philippine Islands. 



Bathymetrical range. From 62 to 142 meters. 



Remarks [by A.M.C.]. The limitation of Iridometra to species in which the first 

 three pinnules are approximately equal has necessitated the removal of this species. 

 Mr. Clark had included it in Argyrometra in the typescript, but the smaller number of 

 cirri distinguish it from the two species of that genus. The rediagnosis of Evantedon 

 to include species with less than 18 segments in P, allows the inclusion of exquisita 

 in this genus. 



EUANTEDON SINENSIS A. H. Clark 



Euanledon sincnsis A. H. CLARK, Smithsonian Misc. Coll., vol. 60, No. 10, 1912, p. 31 (description; 

 ?coast of China; comparison with species of Antedori), p. 32 (comparison with E. moluccana); 

 Proc. Biol. Soc. Washington, vol. 26, 1913, p. 179 (range); Journ. Washington Acad. Sci., vol. 5, 

 1915, No. 6, p. 215 (range); Unstalked erinoids of the Sifjoga-Exped., 1918, p. ix (relationship 

 with E. moluccana), p. 200 (in key; range), p. 203 (references); Temminckia, vol. 1, 1936, p. 316 

 (comparison with E. polytes). 



Diagnostic features. There are 15 to 17 cirrus segments of which the longest are 

 from two to two and a half times as long as broad, and the distal are only very slightly 

 shorter; in the outer portions of the cirri the proximal and distal ends of the segments 

 dorsally are slightly thickened; as a whole the cirri recall those of Antedon mediterranea 

 or of A. adriatica. 



The arms are about 60 mm. and the cirri are from 13 to 15 mm. in length. 



Description. The cirri are about XXX, 15-17, the longest probably from 13 to 

 15 mm. long; the longest segments in the proximal portion are from two to two and a 

 half times as long as broad; the distal segments are only very slightly shorter. The 

 cirri in general appearance resemble those of Antlrn <>dri<itica; the dorsal proximal 

 and distal edges of the segments are slightly thickened in the outer portion of the 

 cirri as in Antedon mediterranea and in A. adriatica. 



The 10 arms are about 60 mm. long, and resemble those of A. adriatica. 



The distal intersyzygial interval is 3 muscular articulations. 



PI is broken in all cases; but it is longer and stouter tluui P 2 . The first segment 

 is short, the second is slightly longer than broad, the third is slightly over twice as 

 long as broad, and the following arc about three times as long as broad. The distal 

 edges of the third and following segments are slightly produced. P 2 is from 6.0 to 6.5 

 mm. in length composed of 9 or 10 segments, of which the second is about as long as 

 broad, the third is nearly twice as long as broad, and the following increase in length 

 so that the outer are about four times as long as the median diameter: the third and 



