STARFISHES OF THE PHILIPPINE SEAS. 181 



Cuyo Island, west of Panay, 2. 



Verde del Sur Island, Palawan, 2. 



Makes! Island, Palawan, 3. 



Caxisigan Island, Balabac (southwest end of Palawan), 7. 



Linapacan Island (north end of Palawan), 5. 



Miu'cielagos Bay, Mindanao, 10. 



Opal, Mindanao, 1. 



Parang, Mindanao, shore, 1. 



Capunuypugan, Mindanao, 2. 



Zamboanga, Mindanao, Dr. E. A. Mearns, 2. 



Mantacas Island, west coast Bohol, shore, 4. 



Cagayan Sulu Island, Sulu Sea, 2. 



Sandakan Harbor, Borneo, 3. 



Papatag Island, Tawi Tawi Group, shore, 4. 



Simulac Island, Tawi Tawi Group, 8. 



This species is widely distributed over the Pacific and Indian 

 regions. Although Sladen records Ar chaster angulatus and not 

 A. typicus from the Philippines, the latter appears to be the com- 

 moner form. No specimen of angulatus was taken by the Albatroi^s 

 at the shore stations, and only one was dredged, as recorded below. 

 These specimens seem to be typical. Some specimens have a vari- 

 able number of superomarginal spines and some lack them entirely. 



ARCHASTER ANGULATUS MuUer and Troschel. 



Plate 45, fig. 3. 



Archaster angulatus Mullee and Troschel, 1842, p. 66. — P. de Lobiol, 

 1885, p. 78, pi. 22, fig. 2. 



This species may be readily distinguished from A. typicus by the 

 presence of 2 or 3 enlarged squamiform spinelets at the outer end 

 of the inferomarginal plates in place of the single prominent lateral 

 flattened spine of typicus. The specimen collected by the Albatross 

 is small, and the rays are decidedly slenderer than in typicus. The 

 superomarginals encroach conspicuously upon the abactinal area — 

 a condition which is not true of large specimens of typical angulatus. 

 There are no signs of any superomarginal spines. At the outer 

 aboral corner of the inferomarginal plates 2 to 4 spinelets are en- 

 larged and become squamiform, but none is prominent. The me- 

 dian radial row of paxillae is very regular. The first adambulacral 

 plate has 6 furrow spinelets, the next 3 have 4, and the rest have 3. 

 The proximal plates usually have 2 longitudinal series of subambu- 

 lacral spinelets: In the first row, 3, or 2 and a two-jawed equally 

 long pedicellaria between them; in the outer row, usually 2 spine- 

 lets, 1 at each outer corner of the plate. A difference in the num- 

 ber of paxillar spinelets is also noticeable, a fairly large lateral 



13434— Bull. 100—19 13 



