230 F. JEFFREY BELL. 



who compared it with the originals. As Brock remarked that Ophioaethiops was closely allied 

 to Dr Marktanner-Turneretscher's Ophioluphus I was glad of the opportunity afforded me by 

 Dr von Marenzeller of comparing the two. I confess I was struck by the differences between 

 them. 



In a hole of a coral mass from the reef of Naifaro, Fadifolu. 



XXI. Genus Astrophyton. 



35. Astrophyton clavatum. 



Astrophyton clavatum, Lyman, Proc. Boston Soc. N. H. vin. (1861), p. 85. 



Mahlos, 24 f., dead and living corals, and Suvadiva, 38/., coarse shell and coral fragments. 



ECHINOIDEA. 



XXII. Genus Cidaris. 



36. Cidaris metularia. 



Cidarites metularia, Lamk. A^iim. S. Vert. ill. (1816), p. 56. 

 Cidaris metularia, A. Ag. Rev. Ech. (1872), p. 98. 



Found constantly on every part of all the reefs visited, wedged in between the branches 

 of growing corals. Dredged five times with corals, 20 — 25/. 



XXIII. Genus Diadema. 



37. Diadema saxatile. 



Echinus saxatilis, Linn. Syst. Nat. (1758), p. 664. 

 Diadema setosum, auct. plurim. 



Diadema saxatile, Loven, Bih. Sven. Vet. Akad. Hdlgr. 13, iv., no. 5 (1887), p. 135. 

 Found on every reef under stones or in hollows of the boulder zone, or between growing 

 corals. 



XXIV. Genus Echinothrix. 



38. Echinothrix diadema. 



Echinus diadema, Linn. Syst. Nat. ed. x. (1858), p. 664. 



Echinothrix calamaris, A. Ag. Rev. Ech. (1872), p. 119. 



Echinothrix diadema, Lov^n, Bih. Sven. Vet. Akad. Hdlgr. 13, iv. no. 5 (1887), p. 137. 



Both this and the next species were common in Minikoi and in the Maldives in the same 

 position as Diadema saxatile. 



39. Echinothrix desori. 



Astroj>yga desori, Ag. Ann. Sci. nat. vi. (1846), p. 345. 

 Echinothnx desori, A. Ag. Rev. Ech. (1872), p. 120. 



