CLARK: AUSTRALIAN AND INDO-PACIFIC ECHINODERMS. 117 



Pectinura vestita. 

 Forbes, 1843. Trans. Linn. Soc. London, 19, p. 143, pi. 13, figs. 1-7. 



Coast of Lycia, Asia Minor, 100 fms. 



This species Las not been met with since Forbes collected his single specimen, 

 " among corallines " on the coast of Asia Minor, nearly seventy years ago. 

 That specimen was obviously young, having a disc only 2-3 mm. across, and 

 there is room for considerable speculation as to what the adult might reveal as to 

 the real relationship of the species. 



Pectinura cylindrica. 



Ophiura cylindrica Hutton, 1872. Cat. N. Z. Ech., p. 3. 



Ophiopeza cylindrica Farquhar, 1895. Trans, and Proc. N. Z. Inst., 27, p. 198. 



New Zealand. Littoral. 



Of three specimens in the M. C Z. collection, one has five supplementary oral 

 plates, one has four, and one has one. According to Farquhar (1. c), there are 

 none. Except between the first and second under arm-plates on one arm of one 

 specimen, there are no arm-pores in the M. C Z. specimens. 



Pectinura exilis. 



Ophiopeza exilis Koehler, 1905. Oph. " Siboga : " Litt., p. 12, pi. 2, figs. 5, 6, and 8. 



Near Tanah, Waigiou, and Kei Islands, D. E. I., 46-222 fms. 



It is most unfortunate that figures 5 and 7 of Koehler's plate are transposed, 

 presumably by a slip of the pen. It is stated in the text, on the bottom of the 

 plate (2) and on the explanatory page opposite, that figs. 6-8 are Ophiopeza exilis, 

 but a little observation and comparison of the figures and descriptions shows that 

 fig. 7 is Ophiocoms permixta, while fig. 5, said to be that species, is really Ophio- 

 peza exilis. 



Pectinura danbyi. 



Ophiopeza danbyi Farquhar, 1897. Journ. Linn. Soc. London, 26, p. 189, pi. 14, 

 figs. 7, 8. 



Raoul Island, Kermadecs, N. Z. 



The single known specimen of this species is notable for its arm-spines, which 

 show a decided resemblance in number, length, and form, to those of Ophiarachna. 



Pectinura arenosa. 



Pectinura arenosa Lyman, 1879. Bull. M. C. Z., 6, p. 48, pi. 14, figs. 392-394. 

 1882, " Challenger " Oph., p. 15, pi. 23, figs. 10-12. 



Off East Moncur Island, Bass Strait, Australia, 38 fms. ; Thursday Island, 

 Torres Strait ; Point de Galle, Ceylon, 34 fms. 



