OPHIURANS OF THE PHILIPPINE AND ADJACENT WATERS. 369 

 AMPHIOPHIURA STELLATA (Studer). 



Ophioglypha stellata Studer ('82), p. 11, pi. 1, fig. 5. — Kcehler ('98), p. 50, 



pi. 2, figs. 3-5. 

 Amphiophiura stellata Matsumoto ('15), p. 77. — H. L. Clabk ('15), p. 



314.— Matsumoto ('17), p. 261. 



Locality. — Albatross station 5400; north of Cebu; Tanguingui 

 Island Light bearing N. 77° W., 41.70 kilometers (22.5 miles) distant 

 (lat. 11° 24' 24" N., long. 124° 05' 30" E.) ; 46 meters (25 fathoms) ; 

 March 16, 1909 ; S., Sh. 



One specimen (Cat. No. 41188, U.S.N.M.). 



Notes. — The specimen agrees well with those I described in 1898 

 which were collected by the Investigator among the Andaman Islands 

 in from 37 to 64 meters (20 to 35 fathoms). The type was found 

 by the Gazelle at Amboina and on the western coast of Australia at 

 a depth of from 5 to 7 meters (3 to 4 fathoms). 



STEGOPHIURA SLADENI (Duncan). 



Plate 83, figs. 4-7 ; plate 84, fig. 1. 

 Ophioglypha sladeni Duncan (79), p. 45S, pi. 9, figs. 9-11. 

 Ophiura stiphra H. L. Clabk ('11), p. 83, fig. 25. 



Stegophiura sladeni Matsumoto ('15), p. 79. — H. L. Clabk ('15), p. 317. — 

 Matsumoto ('17), p. 259, fig. 12. 



Locality. — Hakodate. 



Fifteen specimens (Cat. Nos. 41376, 41377, U.S.N.M.). 



Notes. — The average diameter of the disk is 15 mm. 



The specimens agree well with H. L. Clark's description and figure. 



In 1915 Matsumoto showed that Ophiura stiphra, described as a 

 new species by H. L. Clark in 1911, is a synonym of O. sladeni, 

 which Duncan described from specimens from Korea (Chosen), 

 and this has been accepted by H. L. Clark. Sladen's description is 

 fairly good, but his figures are very schematic, and they are even 

 somewhat inexact, especially figure 11, which shows a side view of the 

 arm and which is entirely erroneous. These figures certainly would 

 not permit the recognition of the species. 



The specimens upon which H. L. Clark described his Ophiura 

 stiphra all came from different stations off southern Japan at which 

 the depth varied between 44 and 152 fathoms (Honshu Island, Ose 

 Zaki, Kagoshima Gulf, and the Korean Straits). 



As H. L. Clark has remarked ('11, p. 84) , S. sladeni is very close to 

 S. sterea (H. L. Clark), which is also a Japanese form, and the two 

 species are distinguished especially by the characters of the arm 

 spines. I have not found S. sterea in the collection which was sent 

 to me, but I have been able to study this species from a specimen 

 which the United States National Museum had the kindness to give 

 me and which had been determined by H. L. Clark. It came from 

 Honshu Island (station 3771. 61 fathoms, or 111 meters). I have 

 55269— 22— Bull. 100 24 



