188 DESCRIPTION OF A NEW OPHIURAN, 



a number of supplementary pieces — one large piece on the middle 

 of the arm, surrounded by three large ones within and three or 

 four smaller ones without. One fiat, broadly ovate tentacle-scale 

 entirely covering the tentacle-pore. Colour uniform pale 

 3'ellowish. 



The above is a description of an individual. 



Hah. — Lyall Bay (one of Captain Hutton's old collecting 

 grounds), near Wellington, New Zealand; one specimen, found at 

 low water on rocks, among seaweed. 



The occurrence of this genus in New Zealand is interesting. 

 Our species differs in many respects from the other two know^n 

 forms — 0. imhricatus, Miiller and Troschel, and 0. Esmarki, 

 Lyman. All are littoral. The latter species occurs on the 

 coasts of California, and 0. imbi'icatitft ranges throughout the 

 Indo-Pacific region, having been found on the northern coast of 

 Australia, at Amboyna, Timor, Java, Philippine Islands, Japan, 

 Samoa, Kingsmill Islands, New Caledonia, Zanzibar, Mozambique, 

 and Mauritius. 



In a former paper, " On the Echinoderm Fauna of New 

 Zealand" (Proc. Linn. Soc. N.S.W., 1898, p. 300), I spoke of the 

 East Indian region as Iving to the north of the Australian 

 Region. Having looked up the marine fauna of this area, I find 

 that the proposed East Indian Region must be abandoned, and 

 we must revert to the late Mr. Woodward's Indo-Pacific Region 

 as defined in his " Manual of the Mollusca," 4th edit., 1880. 

 The marine fauna of this immense region, extending from the 

 eastern shores of Africa to the eastern Pacific, is one, at any rate 

 as regards the Echinoderms and MoUusks, a great many of the 

 forms being widely spread within this area. (Professor Tate, of 

 Adelaide, the greatest authority on the Australian Molluscan 

 fauna, appears to accept Woodward's divisions — Trans. Roy. Soc. 

 S. Aust., Vol. ix., p. 80). 



I have to correct two other misstatements in the above- 

 mentioned paper. Two species of Echinobrissus are known from 

 the Australian Tertiaries — E Australice, Duncan, and E. vincea- 



I 



