74 HAWAIIAN AND OTHER PACIFIC ECHINI. 



Encope emarginata. 



Echinodiscus emarginata Leske, 1778. Add. ad Klein, p. 136. 

 Encope emarginata Agassiz, 1841. Mon. Scut., p. 47. 



Plate 125, fig. 25. 



The bidentate pedicellariae of this species are quite characteristic; the 

 valves have several terminal teeth at tip of blade (PI. 125, fig. 25) and the blade 

 itself is rather short. The range of emarginata is from Uruguay northward, 

 certainly to Venezuela and probably to Yucatan. It has also been reported from 

 Martinique, Florida, and South Carolina but these records are open to consider- 

 able doubt. The diversity in the size and form of the lunules, particularly the 

 posterior interambulacral, is really very extraordinary. 



Encope micropora. 



Agassiz, 1841. Mon. Scut., p. 50. 



There is no doubt that Encope stokesii Agass. ( = Mellila slokesii of the 

 Revision) is the young of this species, whose range is from Lower California 

 to Peru and the Galapagos. The bidentate pedicellariae have valves provided 

 with a relatively long terminal tooth which is flanked on either side by two or 

 three teeth not much shorter. The Albatross collection contains specimens 

 of micropora from two places. 



James Island, Galapagos. 



Station 2835. Off Lower California, 26° 42' 30" N., 113° 34' 15" W. 5.5 

 fms. Gn. m. 



Five specimens. 



Encope perspectiva. 



Agassiz, 1841. Mou. Scut., p. 51. 



The pedicellariae of this species are indistinguishable from those of micropora. 

 Its geographical range is more northerly, from Lower California southward only 

 to Costa Rica. There is little doubt that Encope pacifica Pfeffer, 1881, is identi- 

 cal with perspectiva. The only specimen of this species in the Albatross col- 

 lection is from Ballenas Bay, Lower CaUfornia. It is a bare test and shows a 

 curious departure from normal in that the right posterior petal terminates 

 abruptly, proximally, 8 mm. from the madreporite. Its distal termination is 

 28 mm. from the madreporite, so this fragment of a petal is only 20 mm. long. 



