A MONOGRAPH OF THE EXISTING CRINOIDS 439 



Siboga station 240; anchorage at Banda; 9^5 meters; black sand; coral; 

 lithothamnion bank; November 22 to December 1, 1899 [A. H. Clark, 1918] 

 (1, Amsterdam Mus.). 



Albatross station 5146; in the vicinity of Siasi, Jolo (Sulu) archipelago; Sulade 

 Island (E.) bearing N. 18° W., 3.4 miles distant (lat. 5° 46' 40" N., long. 120° 48' 

 50" E.); 44 meters; coral sand and shells; February 16, 1908 [A. H. Clark, 1908] (1, 

 U.S.N.M., 35049). 



Albatross station 5142; in the vicinity of Jolo; Jolo Light bearing S. 50° W., 

 3.9 miles distant (lat. 6° 06' 10" N., long. 121° 02' 40" E.); 38 meters; coral sand 

 and shells; February 15, 1908 [A. H. Clark, 1908] (2. U.S.N.M., 36133). 



Albatross station 5141 ; in the vicinity of Jolo; Jolo Light bearing S. 17° E., 5.5 

 miles distant (lat. 6° 09' 00" N., long. 120° 58' 00" E.); 53 meters; coral sand; 

 February 15, 1908 [A. H. Clark, 1908] (1, U.S.N.M., 35041). 



Albatross station 5254; Gulf of Davao; Linao Point bearing N. 44° E., 0.7 

 miles distant (lat. 7° 05' 42" N., long, 125° 39' 42" E.); 38 meters; sand and coral; 

 May 18, 1908 [A. H. Clark, 1909] (2, U.S.N.M., 34958, 35042). 



Albatross station 5249; Gulf of Davao; Lanang Point bearing N., 1 mile dis- 

 tant (lat. 7° 06' 06" N., long. 125° 40' 08" E.); 42 meters; coral and sand; May 18, 



1908 [A. H. Clark, 1909] (2, U.S.N.M., 34960, 34962). 



Albatross station 5248; Gulf of Davao; Lanang Point bearing S. 33° W., 0.4 

 mile distant (lat. 7° 07' 25" N., long. 125° 40' 24" T.); 33 meters; coral bottom; 

 May 18, 1908 [A. H. Clark, 1909] (1, U.S.N.M., 34973). 



Macclesfield Bank; 55 metere [Bell, 1894; A. H. Clark, 1913] (1, B. M.). 



Geographical range. — From the Andaman and the Lesser Sunda Islands to the 

 Phihppines. 



Bathymetrical range. — From 31 (?9) to 55 (?538) meters; the average of 9 records 

 (omitting that from the Andaman Islands, where no depth is given, and Siboga 

 station 316, where the depth would seem to be beyond the probable limit) is 43 

 meters. 



History. — This species was first mentioned by Carpenter in 1879 as one of three 

 comatiilids having an anomalous arm structure. He said that in this (the third 

 species, the others being forms of Comatula rotalaria) the rajs may divide eight times, 

 and in the primary divisions there are 3 distichal joints, the fii-st 2 of which are imited 

 by ligaments and not by syzygy. But in all the subsequent divisions the first 2 

 joints beyond each axillary form a syzygy, like the second and third radials. 



The species was firet described by Carpenter in 1888 from a single broken 

 specimen secured by the Challenger at Banda. A specimen from the Macclesfield 

 Bank was recorded as Adinornetra regalis by Bell in 1894. 



In 1908 I recorded it from three Albatross stations in the Philippines, and in 



1909 from three more. In 1913 I published some notes on the type specimen in 

 the British Museum, and at the same time redetermined Bell's specimen from the 

 Macclesfield Bank (erroneously) as C.fruticosus. In 1918 I recorded C. imdtibrachiata 

 from two of the Siboga stations in the Dutch East Indies. 



