AND ECHINOIDEA OF THE KOEEAIS" SEAS. 441 



present state of our knowledge of the undeveloped stages of the 

 species of that group. It is certainly different from any described 

 Fihularia ; but, from the characters which it presents, I prefer to 

 regard it as a young and premature phase of growth, rather than 

 as a new species of that very unsatisfactory genus. 



EcHiNOLAMPAS OYiEOEMis (Gmel.), Gray. 



1788. Echinus oviformis, Gmelin, Linn. Syst. Nat. 3187. 



1801. Nucleolites oviformis, Lamarck, Anim. sans Vert. p. 347. 



1816. Clypeaster oviformis, Lamarck, Anim. sans Vert. p. 15. 



1825. Echinolampas oviformis. Gray, Ann. Phil. x. p. 7, et Cat. R. 



Echinida, p. 35. 

 Echinolampas orientalis, id. ibid. 



Coll.St. John: Korean Straits, W. coast of Mpon, lat.33°14'N., 

 long. 128° 55' E., 40 fathoms. 



The Echinolampas referred to the above species has a very ellip- 

 tical and distinctly ovoid contour when seen from above ; the test 

 is high and fully arched ; apex very eccentric anteriorly, and the 

 mouth in a somew^hat more central position on the actinal surface ; 

 bourrelets moderately developed. Ambulacral petals slightly 

 petaloid, with poriferous zones unequally developed, the anterior 

 zones of the antero-lateral pair and the posterior zones of the 

 postero-lateral pair being little more than half the length of the 

 companion zone of the petal; the inner pores are round, and the 

 outer ones somewhat larger and elongated, Tuberculation mo- 

 derately distant, and widely spaced in the neighbourhood of the 

 actinostome. Apical disk small, and the genital pores not very 

 wide apart. 



The following measurements will serve for comparison : — 

 Length 53 millims, breadth 44 millims., height 33 millims., ante- 

 rior margin to centre of apical disk 17 millims. 



Echinocaediiim: atjsteale, Gray. 



1851. Echinocardium australe, Gray, Ann. 8f Mag. Nat. Hist. 2iid ser. 



vol. vii. p. 131; et Cat. Echinida (1855), p. 44, pi. iv. fig. 1. 

 1851. Echinocardium zealandicum, Gra?/, Ann. SfMag. Nat.Hist. 2nd ser. 



vol. vii. p. 131, et Cat. Echinida (1855), p. 44. 

 1863. Echinocardium Stimpsoni, A. Agassiz, Proc. Acad. N. Sc. Phi- 



ladel. p. 360. 

 1869. Amphidetus novse-zealandiee (Val.), Perrier, Rech. s. les Pedicell. 



p. 176. 

 Coll. St. John : lat. 33° 10' N., long. 129° 12' E., Korea, 36 

 fathoms. 



