518 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



records); Die Fauna Siidwest-Australiens, vol. 4, Lief. 6, 1913, p. 311 (= D. gyges), p. 313 

 (correction of previous records). H. L. CLARK, Spolia Zeylanica, vol. 10, part 37, 1915, p. 85 

 (Ceylon; notes [see under L. palmata]), p. 93 (occurs at Ceylon). HABTMBYEB, Mitt. zool. 

 Mus. Berlin, vol. 8, Heft 2, 1916, p. 235 (Western Australia, No. 5965; later determined as 

 D. gyges). 



Anledon articulata (Brit. Mus., MS.) A. H. CLARK, Mem. Australian Mus., vol. 4, pt. 15, 1911, p. 

 722 (= Dichrometra tenera; Port Essington, Queensland [error]); Crinoids of the Indian Ocean, 

 1912, p. 148 (= Dichrometra tenera); Smithsonian Misc. Coll., vol. 61, No. 15, 1913, p. 32 ( = 

 Lamprometra gyges; Port Essington; North of Cape Hillsboro'). 



Lamprometra gyges A. H. CLARK, Proc. Biol. Soc. Washington, vol. 26, 1913, p. 144 (listed) ; Smith- 

 sonian Misc. Coll., vol. 61, No. 15, 1913, p. 32 (published references to specimens in British 

 Museum; localities represented); Unstalked crinoids of the Siboga Exped., 1918, p. 100 (in key; 

 range). H. L. CLARK, The echinoderm fauna of Torres Strait, 1921, p. 8 (collected by the 

 Carnegie Exped., 1913), p. 23 (Mer; Mabuag, Torres Strait; notes; range; color), p. 192 and 

 following (range), pi. 1, fig. 4 (colored), pi. 21, figs. 4, 5, pi. 22, fig. 3; Journ. Linn. Soc. (Zool.), 

 vol. 35, 1923, p. 231 (Abrolhos Islands), p. 234 (Wooded Isle; characters). McNEiLL and 

 LIVINGSTONE, Rec. Australian Mus., vol. 15, 1926, p. 193 (Port Darwin).- A. H. CLARK, 

 Journ. Linn. Soc. (Zool.), vol. 36, 1929, p. 641 (Hermit Island; Australia). H. L. CLARK, 

 Great Barrier Reef Exped. 1928-29, Scientific Reports, vol. 4, No. 7, 1932, p. 201 (Magneto, 

 station XVII; or G. B. R. E. Gen Surv., A4). GISLEN, Kungl. Fysiogr. Sallsk. Handl., new 

 ser., vol. 45, No. 11, 1934, p. 25. H. L. CLARK, Mem. Mus. Comp. Zool., vol. 55, 1938, p. 

 35 (Darwin, near Shell Island, 3-6 fathoms; Broome; False Cape Bossut; notes). 



Lamprometra tenera A. H. CLARK, Proc. Biol. Soc. Washington, vol. 26, 1913, p. 144 (listed). 

 H. L. CLARK, Carnegie Inst. Washington Publ. 212, 1915, p. 104 (Mer; Marshall Islands). 



Lamprometra protectus (part) A. H. CLARK, Unstalked crinoids of the Siboga Exped., 1918, p. 100 

 (station 209). 



Diagnostic features. Though elongated, P 2 is not enlarged ; the basal segments 

 of the proximal pinnules are strongly carinate. In its typical form Lamprometra 

 palmata gyges is easy to recognize, but it intergrades completely with L. p. palmata. 



Description. The centrodorsal is a moderately thick disk, with an uneven rather 

 small bare dorsal pole, which has an irregular border and is slightly concave. The 

 cirri are arranged in two or two and a partial third irregular rows on its sloping sides. 



The cirri are XXX-XL, 20-30 (usually 20-25), about 15 mm. long and slender. 

 The middle segments are slightly elongated, and the distal are somewhat compressed 

 and bear a dorsal tubercle. 



The radials are partially visible. The IBr! are entirely free laterally. The 

 IBr 2 (axillaries) are pentagonal. The postradial series may divide four times. All 

 the division series are 2. The post-radial series are in close lateral contact. The 

 articulation between the axillaries and the preceding segments is sometimes some- 

 what tubercular. The sides of the postradial series are without protuberances. 



The 32-43 arms are about 65 mm. long and are smooth and slender. The first 

 brachials are almost completely united interiorly; they are a little longer exteriorly 

 than interiorly. The second brachials are somewhat shorter. The first syzygial 

 pair (composed of brachials 3+4) is squarish. The following three or four brachials 

 are shorter and discoidal, and these are succeeded by about 27 rather short triangular 

 brachials. The remaining brachials are short, bluntly wedge-shaped, finally be- 

 coming more squarish. 



