CLARK: JAPANESE AND EAST INDIAN ECHINODEEMS. 301 



Oral shields large and conspicuous; arms 5-7; no tentacle scales on first 3 



pairs of pores, but 2 on each succeeding pore adhaerens. 



Skin of disc and bases of arms with numerous minute pits and pores constrictus. 

 Radial shields and upper arm-plates with more or less numerous spines, spinulosus. 



ECHINOIDBA. 



Cidaris metularia. 



Cidarites metidaria Lamarck, 1816. Anim. s. Vert., 3, p. 56. 



Cidaris metidaria Blainville, 1830. Zoophytes : Diet. Sci. Nat.," 60, p. 212. 



1 specimen, 18 mm. in diameter. Guam, Ladrone Islands. Owston collection. 



Phyllacanthus baculosa. 



Cidarites baculosa Lamarck, 1816. Anim. s. Vert., 3, p. 55. 

 Phyllacanthus baculosa A. Agassiz, 1872. Rev. Ech., pt. 1, p. 150. 



4 specimens, 24-38 mm. in diameter. Amboina. Barbour collection. 



Goniocidaris biserialis. 



Stephanocidaris biserialis Doderlein, 1885. Arch. f. Naturg., 51 (1), p. 79. 

 Goniocidaris biserialis Doderlein, 1887. Jap. Seeigel, p. 10. 



3 specimens, 25-32 mm. in diameter. Uraga Channel, Gulf of Tokyo, Japan, 

 20-30 fathoms. — 1 specimen, 25 mm. in diameter. Sagami Bay (34° 58' N. x 

 138° 45' E.), Japan, 77 fathoms. Owston collection. 



Goniocidaris mikado. 



Discocidaris (Cidaris) mikado Doderlein, 1885. Arch. f. Naturg., 51 (1), p. 80. 

 Goniocidaris mikado Doderlein, 1887. Jap. Seeigel, p. 15. 



3 specimens, 20 mm. in diameter. Sagami Bay (34° 58' N. x 138° 45' E.), 77 

 fathoms. Owston collection. 



Diadema setosum. 



Cidaris diadema var. $ setosa Leske, 1778. Add. Klein, p. xvii (nomen nudum). 

 Echinometra setosa Leske, 1778. Add. Klein, p. 36; Plate 37, fig. 1, 2. 

 Diadema setosa Gray, 1825. Ann. Phil., p. 4. 



10 specimens, 33-55 mm. in diameter. Amboina. Barbour collection. — 1 

 specimen, 15 mm. in diameter. Sagami Bay, Japan, 2 fathoms. Owston 

 collection. 



