152 BULLETIN 82, UNITED STATES NATIONAL MUSEUM VOLUME 1 



the following gradually decreasing in length so that the antepenultimate is slightly 

 longer than broad and the penultimate about as long as broad. The second and third 

 segments strongly constricted centrally, with expanded ends, the following gradually 

 losing this character and becoming laterally flattened and hence broader in lateral view, 

 the outer segments being nearly or quite twice as broad dorsoventrally as the proximal; 

 opposing spine large and prominent, triangular, arising from the entire dorsal surface 

 of the penultimate segment, directed obliquely forward. 



Distal borders of the radials even with the run of the centrodorsal. 



IB^ short, almost entirely divided in the median line by the posterior processes of 

 the axillaries, well separated interradially and not in contact basally; IBr 2 (axUlaries) 

 rhombic, all the sides strongly concave, about as broad as long and widely separated 

 from their neighbors. 



Arms 10, 45 mm. long, resembling those of A. serrata, but the distal edges of the 

 brachials, while overlapping and spinous, are much less conspicuously and more finely 

 spinous, and lack the strongly marked longitudinal ridges running inward from each 

 of the spinous processes. 



Syzygies occur between brachials 3+4,9+10, 14 + 15, and distally at intervals of 3 

 muscular articulations. The arm width at the first syzygy is 0.8 mm. and the length 

 from IBri to the second syzygy is 5.5 mm. 



PI is 6.8 to 8.5 mm. long, moderately slender, composed of 16 to 18 segments of 

 which the first two are broader than long, the third is about twice as long as the median 

 breadth, and the remainder are approximately three times as long as broad, and some- 

 what longer distally; the third and following have slightly projecting and overlapping 

 distal edges, this increasing distally (see fig. Q,d, p. 149). P 2 is much smaller and 

 more slender than PI, 4 mm. long and with 11 segments, of which the first two are 

 short, the third is half again as long as broad, and the following rapidly become elon- 

 gated; the segments have moderately produced spinous overlapping distal edges. P 3 is 

 from 3.0 to 4.5 mm. long, with about 11 segments, tapering less rapidly than P 2 and 

 thus appearing stouter, especially distally. P 4 is similar to P 3 , but slightly longer and 

 slightly stouter. The distal pinnules are very slender, 7 mm. long, with 16 or 17 seg- 

 ments which have slightly spinous distal edges. 



Notes. A specimen which I have examined and which appears to be referable to 

 this species comes from 20 miles off Double Island Point, Queensland, in 55 meters; 

 it was named Compsometra loveni by Dr. H. L. Clark. The cirri are about XV, 10-11 

 (usually 10) ; the arms are 35 mm. long; Pj is 5.5 mm. long, with 20-23 segments. 



Localities. Siboga station 144; anchorage north of Salomakiee (Damar) Island, 

 Anarnbas Islands, northeast of Singapore; 45 meters; coral bottom and lithothamnion; 

 August 7-9, 1899 [A. H. Clark, 1912, 1918] (1, the holotype, Amsterdam M.). Type 

 locality. 



Claremont Island, northern Queensland (lat. 1410' S.); 20 meters [A. H. Clark, 

 1911] (1, U.S.N.M., 35678). 



Endeavour; thirteen miles north by west of Double Island Point, Queensland 

 (lat. 2600' S.) ; 46-47 meters [H. L. Clark, 1916]. 



Endeavour; twenty miles northnortheast of Double Island Point; 55 meters 

 [H. L. Clark, 1916] (1, M.C.Z., 719). 



Willebrord Snellius; Beo, Talaud Islands, East Indies; 6-10 meters; June 14-21, 

 1930 [A. H. Clark, 1936] (1, Leyden M.). 



