436 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



long and the cirri 87 mm. long. Another is similar. The third is very small with the 

 arms only 35 mm. long, but it has already developed the compressed and overlapping 

 brachials and the strong proximal carination of the adults. I remarked that this 

 species is very easily distinguished from A. longicirra, with the type of which I was 

 able to compare it directly, by the stout high keels on the elements of the IBr series 

 and first two brachials which are practically confluent on succeeding ossicles; the 

 axillaries bear a single sharp keel. 



The material from Siboga station 294 consisted of five very small specimens and 

 a few cirri from larger examples. Speaking of all the specimens from Siboga stations 

 260 and 294 I said that the keels on the elements of the IBr series and on the first 

 two brachials are considerably higher in this species than in A. cristata. 



One of the specimens from St. Nicolaas Bay, Bali, has 11 arms 100 mm. long, one 

 IIBr 2 series being present; the longest cirri have 93 segments. Another specimen 

 has 10 arms 100 mm. long; the longest cirri have 95 segments. The two other speci- 

 mens are small; each has 10 arms. 



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

 Jaan, Kei Islands (lat. 536'30" S., long. 13255'12" E.); 90 meters; sand, coral, and 

 shells; December 16, 18, 1899 [A. H. Clark, 1918] (3, Amsterdam Mus.). 



Danish Expedition to the Kei Islands; Dr. Th. Mortensen; station 24 (11, U. S. 

 N.M., E. 3183; C.M.). 



Sahul Bank, south of the southern end of Timor (lat. 1130' S., long. 125 E.); 

 from a cable [Bell, 1893; A. H. Clark, 1909, 1911, 1912, 1913, 1918; Sieverts, 1932; 

 GisleX 1933] (4, B. M.; I. M.). 



Siboga station 294; Timor Sea, south of southwestern Timor (lat. 1012'12" S., 

 long. 12427'18" E.); 73 meters; soft mud with very fine sand; January 23, 1900 

 [A. H. Clark, 1918] (5, U. S. N. M., E. 415; Amsterdam Mus.). 



Rotti Strait, between southwestern Timor and Rotti; 183 meters; cable repair 

 ship Cable, Eastern and Associated Telegraph Co.; from the Banjuwangi-Darwin 

 No. 2 cable [A. H. Clark, 1929] (2, B. M.). 



St. Nicolaas Bay, western end of Bali; September 7, 1909 [A. H. Clark, 1933] 

 (4, Buitenzorg Mus.). 



Geographical range. From the Kei Islands and the Sahul Bank, south of south- 

 western Timor, westward to Bali. 



Bathymetrical range. From 73 to 183 meters; but it undoubtedly occurs also in 

 water of lesser depth. 



History. Dr. John Anderson, the superintendent of the Indian Museum at 

 Calcutta, sent to Dr. Philip Herbert Carpenter a small collection of crinoids that had 

 been taken from a cable crossing the Sahul Bank. Dr. Carpenter was apparently 

 unable to devote any time to studying this collection, for he made no notes in connec- 

 tion with it. After his death J. Wood-Mason, who had succeeded Dr. Anderson as 

 superintendent of the Indian Museum, transferred the collection to Prof. Francis 

 Jeffrey Bell, who published a report upon it in 1893. In the collection were several 

 specimens identified by Professor Bell as Antedon longicirra. Most of these were of 

 the present species, but one represents A. anthus. Many years later Dr. Nelson 

 Annandale, then the Superintendent of the Indian Museum, sent all the crinoids of 

 that institution to Dr. Francis Arthur Bather for study. Dr. Bather was so kind as 



