260 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



is also some resemblance between our species and 0. poecilodisca 

 recently described by H. L. Clark from specimens from Zanzibar 

 ('15, p. 276, pi. 13, fig. 5). The arrangement of the plates of the 

 dorsal surface of the disk recalls that of 0. prostrate, with more 

 slender spines and smaller radial shields. H. L. Clark says that the 

 arm spines are slender, smooth and pointed, and sometimes stouter, 

 with the extremity thickened and spinulose; the upper and under 

 arm plates are broader than long. The general red color, with a 

 beautiful color pattern, is entirely different from that of O. prostrata. 



OPHIOTHRIX PROTEUS Kcehler. 



Plate 36, figs. 3, 4 ; plate 101, fig. 3. 



See for bibliography : 



Ophiothrix proteus Kcehleb ('05), p. 100; ('07), p. 336. — H. L. Clark ('15), 

 p. 277. 



Localities. — Albatross station 5152; Sulu (Jolo) Archipelago, 

 Tawi Tawi Group; Pajumajan Island (W.) bearing S. 2° W., 3.71 

 kilometers (2 miles) distant (lat. 5° 22' 55" N., long. 120° 15' 45" 

 E.) ; 62 meters (34 fathoms) ; February 18, 1908; wh. S. 



One specimen (Cat. No. E. 152, U.S.N.M.). 



Albatross station 5432; eastern Palawan and vicinity; Corandagos 

 Island (NW.) bearing N. 30° E., 10.56 kilometers (5.7 miles) distant 

 (lat. 10° 37' 50" N., long. 120° 12' 00" E.) ; 93 meters (51 fathoms) ; 

 April 8, 1909 ; S. 



One specimen (Cat. No. E. 151, U.S.N.M.). 



Notes. — In the specimen from station 5432 the diameter of the disk 

 is 5 mm., and the arms are about 50 mm. in length ; in the other the 

 diameter of the disk reaches almost 7 mm., but the arms are very 

 incomplete. 



The hook formed by the first ventral arm spine is rather narrow 

 and somewhat elongated; it shows three or four branches, the first 

 stouter than the others (pi. 101, fig. 3d). The tentacle scale (fig. Zc) 

 is elongated and shows on its free border a few spines one of which 

 is usually more developed than the others. 



In the specimen from station 5152 the coloration agrees with that 

 which I have described, and all along the median dorsal line of the 

 arms there extends a white band bordered on either side by a nar- 

 rower purple line. The ventral surface of the arms shows a broad 

 white line, which also extends the whole length of the arms and which 

 is bordered by a somewhat irregular broad pink band. 



In the specimen from station 5152 the white band which extends 

 along the median line of the arms is extremely narrow, and it is often 

 interrupted toward the proximal and distal borders of each upper arm 



