492 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



The two specimens from Sipankot are both small. One has 12 arms 20 mm. 

 long. P 2 is similar to PI but smaller and shorter. The second segment of P! and P 2 

 has a high, thin, carinate ridge. The third segment is rarely similarly carinate; 

 usually it has a low carination in the proximal portion that dies away distally. 



The specimen from Sissie has about 34 arms. The outermost P 2 on each post- 

 radial series are very large. 



The specimen from Wotap is small, with 18 arms 45 mm. long, and is undergoing 

 adolescent autotomy. 



One of the specimens from Obi latoe has 35 arms 80 mm. long. 



The specimen from Beo, Talaud Islands, is small and young. 



The example from Laha, Amboina, has 40 arms 100 mm. long, all the IIBr and 

 IIIBr series being present. The proximal pinnules are much larger on the outer- 

 most sides of the postradial series than elsewhere. 



One of the four specimens from Lembeh Strait, Celebes, has 38 arms about 110 

 mm. long. Another has 37 arms 115 mm. long. A third has 24 arms 80 mm. long; 

 on the outermost arms of each postradial series P 3 resembles P 2 , but is shorter. The 

 fourth has 21 arms 100 mm. long and resembles the preceding. 



Carpenter described Antedon bremcuneata from Amboina in the following terms : 

 The centrodorsal is a thick disk with a slightly hollowed dorsal surface and a single or 

 partially double row of marginal cirri. The cirri are about XXX, 25-30. The cirrus 

 segments are tolerably equal, the sixth and seventh about as long as broad and the 

 next two or three just longer than broad. The segments following diminish gradually 

 in size toward the end, but without developing dorsal spines except for a small and 

 blunt one on the penultimate. The radials are not visible. The IBr! and IBr 2 (axil- 

 laries) are very convex dorsally, the former being shorter in the middle than at the 

 sides where they are closely united to their fellows. The axillaries are short, pentag- 

 onal, with wide distal angles, less than twice the length of the IBr 2 . The postradial 

 series are in close lateral contact, but divide three times, each division series being 2. 

 The ossicles of the primary arms on the outer side of the postradial series are some- 

 what flattened laterally where they are in contact with their fellows. The 39 arms 

 are 90 mm. long. The first brachials are large and rhomboidal. The second are 

 shorter and much more wedge-shaped. The first syzygial pair (composed of brachials 

 3+4) is nearly square, rather longer on the inner than on the outer side. The next five 

 brachials are nearly oblong with slight forward projections alternately from the outer 

 and inner sides of their distal edges. The following brachials are smooth, short, and 

 wedge-shaped, retaining the forward projection about as far as the sixtieth, but much 

 more markedly on some arms than on others. The later brachials gradually become 

 blunted and nearly square at the extreme arm ends. The first syzygy is between 

 brachials 3+4, the second is between brachials 5+6, 6+7, 10+11, or as far as 18+19, 

 and the distal intersyzygial interval is 8 to 19, usually about 11, muscular articu- 

 lations. 



The largest and stoutest pinnule on the outer side of the arm is P 2 , which is about 

 10 mm. long and consists of about 25 segments, which are stout at the base but taper 

 away rapidly toward the end. Pt is similar but somewhat smaller. The relative sizes 

 of PI and P 3 are rather variable, but both are smaller than P 2 . P 4 is a good deal 

 shorter than P 3 and only about one-quarter as long as P 2 ; it consists of only seven or 



