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DISCOVERY REPORTS 



widely separated ; their outer edge convex. The three proximal ones have their sides 

 with re-entrant curves on account of the large, oval tentacle scale ; from the fourth they 

 are triangular, the tentacle scales being now smaller and placed at the lateral corners. 

 The dorsal arm plates are triangular, widely separated. Only two short appressed arm 

 spines. The genital slits show a slight proximal and distal widening ; they end opposite 

 the middle of the second lateral plate. The colour is a light greyish brown on the radial 

 shields with the arms and the other disk plates whitish ; also a couple of narrow whitish 

 bands on the arms. 



Fig. 32. Ophiozonella megaloplax, n.sp. Oral side («) and dorsal side (b). 

 a, X22"5; b, X20. The buccal plate with the three pores is the madreporite. 



In particular, the covering of the ventral interradii distinguishes this species from all 

 other known species of Ophiozonella, as also from Ophiozonoida picto, the only related 

 species in New Zealand seas. 



Ophiozonoida picta, H. L. Clark 



Ophiozonoida picta, H. L. Clark, 1915. Cat. Recent Ophiurans, p. 340, pi. 18, figs. 3-4. 



O. picta, Mortensen, 1924. Eclmiodenns of Nezv Zealand and the Auckland-Campbell Islands. 



II, Ophiuroidea. Papers from Dr Th. Mortensen 's Pacific Exped., xx (Vid. Medd. Dansk 



Naturh. Foren., 77), p. 168. 



St. 934. 17. viii. 32. 34° 11' S, 172° 11' E, Cook Strait, New Zealand, 98 m. 4 specimens. 



I have nothing to add to the descriptions of this beautiful little Ophiurid given in the 

 two works quoted. One specimen was opened; it was found not to be viviparous. 



