440 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



quadrate after the thirtieth, and at the tip of the arm longer than broad. Syzygies 

 occur between brachials 3+4, 9 + 10, 14+15, 18+19, and 23+24, and then at intervals 

 of 8 to 11 muscular articulations. All the pinnules are cylindrical, and the lower 

 ones are stiff and little flagellate. PI is about 6 mm. long and consists of 19 segments. 

 P a is much smaller, little longer than P 3 , and consists of 11 segments. P 2 is the largest 

 pinnule, 7 or 8 mm. long, and consists of 18 segments. P b is longer than P a , and con- 

 sists of 11 segments. P 3 is the smallest pinnule and consists of 10 segments. P c is 

 very similar to P 8 . The succeeding pinnules gradually increase in length until at the 

 middle of the arm they are 6 or 7 mm. long, with about 20 segments. The color is 

 rich purple, with the base of the arms and a broad distal band white, the pinnules 

 often with yellowish or rusty tips. The cirri are cream color dorsally and deep brown 

 on the ventral side. Dr. Clark said that the colors were almost perfectly preserved in 

 alcohol. 



The specimen from Torres Strait included in the material from which Hartlaub 

 described Antedon monacantha has about 20 arms. The second syzygy is between 

 brachials 16+17 or 17+18, and the distal intersyzygial interval is six or seven muscular 

 articulations. While in the specimens from Mortlock Island (=protectus) P 2 is very 

 stout and strong and is composed of only 12 segments, in the present specimen from 

 Torres Strait it is much more slender, with about 20 segments, of which the fourth and 

 fifth are not set off from those succeeding by their greater length. 



Habits. Dr. Hubert Lyman Clark said that the type specimen of Stephanometra 

 callipecha proved to be an active individual and was a very graceful swimmer. 



Localities Mabahiss station 10; Red Sea (lat. 1331'00" N., long. 4231'00" 

 E.); 55 meters; September 17, 1933 [A. H. Clark, 1936] (fragments, B. M.). 



John Murray Expedition to the Indian Ocean, 1933-1934, motor boat station 

 Id; Red Sea; bay between Great Hanish and Suyul Hanish Islands (la*. 1339'30" 

 N., long. 4243'00" E.); 26 meters; sand, shells, and coral; September 17, 1933 (1, 

 B. M.). 



Suez Bay; 18 meters; mud [Chadwick, 1908; A. H. Clark, 1909, 1911, 1912]. 



SeycheUes; 62 meters [Bell, 1909; A. H. Clark, 1911, 1912, 1913, 1918] (1, B. M.). 



Madagascar; M. Grandidier, 1905 [A. H. Clark, 1911, 1912, 1918] (1, P. M.). 



Rodriguez; Henry H. Slater, Transit of Venus Expedition, 1874 [Smith, 1876, 

 1879; P. H. Carpenter, 1883, 1888, 1889; Hartlaub, 1891; A. H. Clark, 1907, 1909, 

 1911, 1912, 1913, 1918] (1, B. M.). 



Farquhar Atoll, north reef [Bell, 1909; A. H. Clark, 1911]. 



Ceylon Pearl Oyster Fisheries station LIV; in the northern part of the Gulf of 

 Manaar, south of Adam's Bridge ; 7-73 meters ; bottom varied, from sand to living 

 coral [Chadwick, 1904; A. H. Clark, 1911, 1912, 1918; H. L. Clark, 1915]. 



Mer Island, Murray Islands, Torres Strait; southwestern reef; H. L. Clark, 

 October 27, 1913 [H. L. Clark, 1915, 1921; A. H. Clark, 1918] (1, M. C. Z., 592). 



Torres Strait [Hartlaub, 1890, 1891; A. H. Clark, 1909, 1911, 1912, 1918]. 



Geographical range. From Madagascar, the Seychelles, and the Red Sea to 

 Ceylon; Torres Strait. 



Bathymetrical range. Littoral and down to 62 (?73) meters; most of the records 

 are from the shore line. 



