498 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



first 2 brachials are as strongly flattened against each other as in the extreme cases 

 among the Thalassometridae. 



The other specimen is in general similar to the preceding. It has 48 arms. All 

 of the IIBr series are 4 (3 + 4). Eight of the IIIBr series are 4 (3 + 4), the remainder 

 being 2. Following 2 of the IIBr series, the same crowded conditions are noticeable 

 as in the other specimen. The cirri are VIII, 13-16, 8 mm. long. The color in 

 alcohol is blackish brown, the division series and arms having an irregular medio- 

 dorsal line of light yellow brown. 



The specimen dredged by the Gazelle north of Port Walcott has nearly 100 arms 

 which are about 100 mm. long. The IIBr series are all 4 (3 + 4). The IIIBr series 

 are about equally 2 and 4 (3 + 4). The IVBr series are almost always present, 

 4 (3 + 4), rarely 2. VBr series are common, and VIBr series occur, all 4 (3 + 4). 

 The centrodorsal is irregularly rounded pentagonal, countersunk to the level of the 

 radials; the periphery is somewhat notched with obsolete cirrus sockets. The color 

 in alcohol is light brownish. 



The specimen from Baudin Island has between 75 and 80 arms. 



The specimen from Feather Reef is large, with about 70 arms. 



The example from Surprise shoal is small, with 40 or more arms. 



The type specimen from Port Denison was thus described by Bell: 



Centrodorsal flattened; 15-20 marginal delicate cirri, formed of a few 

 short joints. 



Arms more than 70. 



First radials obscured; second [IBri] in contact, at least three times as 

 long as they are broad; third [IBr 2 ] widely triangular. Three distichals, the 

 axillary a syzygy [IIBr 4 (3 + 4)]; two palmars [IIIBr 2]. If there is another 

 division, there are again two joints; no syzygy. The first five or six brachials 

 have nearly even edges; the succeeding ones are markedly wedge-shaped. A 

 syzygy on the third brachial; succeeding syzygies rare. 



Second pinnules longer than first, very delicate, made up of a number of 

 small joints; the succeeding pinnules stouter and more fleshy. 



This is one of the species in which there is a very considerable difference 

 in the length of the arms; here some of the arms may be as much as 110 millim. 

 long, while others are only 75 millim. There is an interradial plating, extending 

 as far as the distichal [IIBr] axillary. 



The colour (in spirit) is dark brown. 



The figure shows an individual with 71 arms. The IIBr series are all 4 (3 + 4). 

 Two of the IIIBr series are 4 (3 + 4), the other 18 being 2. Nine of the IVBr series 

 are 2, but all the rest are 4 (3 + 4). The centrodorsal is discoidal, apparently deeply 

 hollowed in the center. There are about XVII very short and rudimentary cirri. 



Carpenter noted the discrepancy between Bell's description and the figure. He 

 pointed out that in the latter about two-thirds of the IVBr series are 4 (3 + 4), and 

 also that there are 3 VBr series shown which Bell does not mention at all. 



Dr. Th. Mortensen's specimen from off Jolo in about 29 meters has about 150 

 arms, Of the 10 IIBr series, 9 are 4 (3 + 4) and 1 is 2. The centrodorsal is very 

 small, stellate, and deeply sunken within the radial circlet. One of the specimens 



