ECHINOMETRA OBLONGA. 373 



Echinometra picta A. Ag. and CI. 



Echinometra picta A. Agassiz and Clark, 1907. Bull M. C. Z., L, p. 241. 



Plates 95, figs. 6-12; 114, figs. 5, 6. 



The more the specimens on which this species is based are studied the more 

 doubtful it seems whether it is really distinct from Mathcei, but the figures of 

 typical specimens, as well as of the pedicellarise, will enable other zoologists to 

 recognize the form to which attention is called. In such specimens, the test is 

 distinctly flattened and wider than usual, the height being less than one half 

 the length, while the shorter diameter is about .85-.90 of the longer. The spines 

 seem to be less crowded and are somewhat more slender than in Mathcei, and 

 are much less numerous on the abactinal system. The latter is distinctly larger 

 than in that species, its diameter sometimes nearly equalling one third of the 

 test-length. The color is dark brown for the test and light fawn-color for the 

 spines. Such specimens as these occur only in material from the Hawaiian, 

 Society, and Philippine Islands. They intergrade with Mathosi in each one of 

 these characters taken by itself, more or less fully, but are usually easily distin- 

 guished by their general appearance resulting from the combination of all five. 

 The pedicellarise (PI. 95, figs. 6-12) show no characteristic peculiarities, but the 

 various forms illustrative of the genus are figured. 



The "Albatross" collected picta at the following places: 



Station 3881. Napili Harbor, Maui, Hawaiian Islands. 



Station 3975. Off Necker Island Shoal, H. I. 16-171 fathoms. Crs. S., 

 co., sh. 



Necker Island, H. I. Puako Bay, Hawaii, H. I. 



Kamalina Bay, Niihau, H. I. Hilo Bay, Hawaii, H. I. 



Waianae, Oahu, H. I. Fakarava, Paumotu Islands. 



Honolulu Reef, H. I. 



Thirty-four specimens. 



Echinometra oblonga Bl. 



Echinus oblongus de Blainville, 1825. Diet. Sci. Nat., XXXVII, p. 95. 

 Echinometra oblongus de Blainville, 1830. Diet. Sci. Nat., LX, p. 206. 



Plate 114, figs. 1, 2. 



As this interesting form has never been figured, so far as known, it has 

 seemed desirable to give an illustration showing its general appearance. The 



