A MONOGRAPH OF THE EXISTING CRINOIDS 259 



The 10 arms are probably about 60 ram. long, and resemble those of Comissia 

 lutkeni. The lower brachials are triangular and about as long as broad. The arms 

 increase slightly in width up to the twelfth or fourteenth brachials, from this point 

 slowly tapering distally. 



The distal intersyzygial interval is 3 muscular articulations. 



P! is from 12 to 14 mm. long, very slender, and composed of 40 segments. The 

 terminal comb is composed of 15-17 long curved teeth which are set very close together 

 basally. P 2 is 12 mm. long and resembles PI; its comb has 14 teeth. P 3 is 9 mm 

 long and resembles P 2 . P 4 is 8 mm. long, with a comb of 14 teeth. P 5 is 7.5 mm. 

 long, with a similar comb. P 6 is somewhat stouter than the preceding pinnules, 5 

 mm. long, with a rudimentary comb. The following pinnules resemble P 6 , but are 

 without combs. The distal pinnules are slender, 9 mm. long. 



Notes. In the specimen collected by the Siboga the arms are about 60 mm. 

 long. The dorsal pole of the centrodorsal is 2.5 mm. in diameter. The cirri are XIII, 

 10-11 (usually 10), 8 mm. long; the longest cirrus segments are very slightly less 

 elongate than in the type specimen, but I can find no other differences. 



Localities. Albatross station 5431; in the vicinity of eastern Palawan; Coran- 

 dagos Island (N. W.) bearing N. 28 E., 4.8 miles distant Gat. 10 38' 45" N., long. 

 120 12' 45" E.); 93 meters; sand; April 8, 1909 [A. H. Clark, 1911] (1, U.S.N.M., 

 27485). PI. 29, fig. 83. 



Siboga station 260; 2.3 miles N. 63 W. from the north point of Nuhu Jaan, Kei 

 Islands (lat. 5 36' 30" S., long. 132 55' 12" E.); 90 meters; sand, coral, and shells; 

 December 16, 1899 [A. H. Clark, 1918] (1, Amsterdam Mus.). 



Geographical range. From Palawan southward to the Kei Islands. 



Bathymetrical range. From 90 to 93 meters. 



Remarks. This species is only known from 2 specimens, one collected by the 

 Albatross, the other by the Siboga. 



COMISSIA SPINOSISSIMA A. H. Clark 



Plate 27, Figures 73, 74 



Comissia spinosissima A. H. CLARK, Proc. Biol. Soc. Washington, vol. 25, 1912, p. 20 (description; 



Siboga station 305); Unstalked Crinoids of the Siboga Exped., 1918, p. 20 (in key; range); 



p. 21 (detailed description; station 305); p. 276 (listed); pi. 13, figs. 12, 13. GISLN, Vidensk. 



Medd. fra Dansk naturh. Foren., vol. 83, 1927, p. 8 (Mortensen's stations 7, 8, 9; notes; parvitla 



from Bock's station 8 also this species); figs. 3, 4, p. 15. 

 Comissia parvula (part) GISLN, Nova Acta reg. Soc. sci. Upsaliensis, ser. 4, vol. 5, No. 6, 1922, 



p. 23 (Bock's station 8). 

 Comissia cf. spinosissima GISLN, Zool. Bidrag fran Uppsala, vol. 9, 1924, fig. 94, p. 87 (synarthrial 



face) . 

 Comissia, sp. GISL&N, Zool. Bidrag fran Uppsala, vol. 9, 1924, p. 89 (synarthries). 



Diagnostic features. The cirri are XX-XXX, 9-12 (usually 10-11), from 7 to 

 9 mm. long, small and slender, with the distal edges of the short distal segments 

 rather strongly produced; the longest cirrus segment is about four times as long as 

 the median width; the earlier cirrus segments have much swollen ends. The arms 

 are from 40 to 45 mm. long. The elements of the division series and the brachials 

 have their distal borders armed with very long fine spines. The comb on P! consists 

 of 8-10 large teeth. P 4 does not bear a comb. 



