114 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



encircled by a dark band. The sixth and following segments bear long sharp dorsal 

 spines. The opposing spine is long and slender, about as long as the width of the 

 penultimate segment. The terminal claw is considerably longer than the penulti- 

 mate segment, rather slender, and moderately curved. The longer cirrus segments 

 have a slight central constriction. 



Another specimen bearing the same date is similar but has 20 arms due to the 

 presence of all the IIBr series, eight of which are 4(3+4) and two 2. 



Dated April 16, 1907, are 15 specimens with 17-25 arms 40 to 50 mm. long. 

 The cirri are XIII-XX. All the IIBr series are 4(3+4). IIIBr series are present 

 in all the specimens, hi all cases 2, and developed internally. 



Of two specimens dated July 23, 1907, one resembles in general the first mentioned 

 from Singapore. The 20 arms are 75 mm. long. Of the 10 IIBr series 7 are 4(3+4), 

 one is 2, and the remaining two consist of a single ossicle each. The cirri are XXIII, 

 30, 15 mm. long. The other specimen has 12 arms 50 mm. long. There are 2 IIBr 

 4(3+4) series. The brachials are somewhat wedge-shaped, longer than in the pre- 

 ceding specimen. The cirri are XX, 25-28, 15 mm. long. 



An example dated July 27, 1907, has 24 arms 60 mm. long. The 10 IIBr series 

 are 4(3+4). Four IIIBr 2 series are present, 3 developed internally and one exter- 

 nally. The cirri are XX, 25-30, 15 mm. long. 



A specimen with 16 arms 70 mm. long is dated November 27, 1907. Six IIBr 

 4(3+4) series are present, but no IIIBr series. The cirri are XXII, 30, the transition 

 segment being usually the eighth. 



The specimen from Singapore in the British Museum is small, with 20 arms. 



The specimen from the Danish Expedition to the Kei Islands station 73 is very 

 small, with 12 arms about 30 mm. long. 



The example from the Danish Expedition to the Kei Islands station 101 is small 

 with 13 arms 50 mm. long and is in process of adolescent autotomy. 



The specimen from north-northeast of Indramayu Point, Java, has 18 arms. 



The specimen from Siboga station 322 is small, with 16 arms 60 mm. long. Five 

 of the six IIBr series are 2 instead of 4 (3+4). The cirri are XVII, 27, 17 mm. long. 

 The color is deep purple. 



One of the specimens from the Danish Expedition to the Kei Islands station 38 

 has 22 arms 130 mm. long, slender and very slowly tapering. There are seven IIBr 

 4 (3 + 4) series and five IIIBr 2 series, of which three are internal and two external. 

 The cirri are XVIII, 26-30, about 25 mm. long. The other is similar with 26 arms 

 125 mm. long. The 10 IIBr series are 4 (3+4); of the six IIIBr series, five are 4 

 (3 + 4) and one is 2. Three of the IIIBr series are developed externally and three 

 internally. 



Of the three specimens from Amboina, one has 24 arms 135 mm. long; the longest 

 cirri have 35 segments. Another has 22 arms with ten IIBr 4 (3 + 4) series and two 

 IIIBr 2 series, the latter both internal. The cirri have 29 segments. The third has 

 22 arms, with eight IIBr 4 (3+4) series and four IIIBr 2 series, the latter all internal. 



The specimens from Siboga station 162 are both young. One with 14 arms is 

 deep purple with a broad mediodorsal line of white on the arms. The other, which 

 is much broken, is entirely deep purple. 



