30 ECHINOIDEA. I. 



No end-tooth; no limb on the stalk. Small pedicellarise with end-tooth and large, not terminal 

 opening. Tridentate pedicellarise ?, spicules ?. Spines extended in a more or less flower-like way, trace 

 of basal widening. 



Species: P.florigera (A. Ag.). 



Distribution: The Philippines (Chall. st. 204) (or New Guinea; Chall. st. 192). Sublittoral. 



Phyllacanthus Brandt (emend.). 

 Synonym: Leiocidaris Desor. 



Large globiferous pedicellarise with small terminal opening; no end-tooth; the blade prolonged 

 in a snout-like way. Limb on the stalk? Small pedicellarise with end-tooth. Tridentate pedicellariae 

 with the blade filled by a close reticulation forming irregular longitudinal ridges closely set with teeth. 

 Spicules simple. Spines large and thick, finely striated. 



Species: Ph. imperialis (Lamk.), (?) dubia Brandt, (?) parvispina Woods. 

 Distribution: The Red Sea, the Indian Ocean, Australia. Littoral forms. 



Histocidaris n. g. 



Large globiferous pedicellarise unknown; small pedicellarise with two rather strong end-teeth (?). 

 Tridentate pedicellarise of a larger and a smaller form; the blade of the large ones is filled by a 

 rich net of meshes, the holes of which are rather distinctly arranged in series, and radiate in a fan- 

 shaped way from the upper end of the apophysis; numerous small thorns on the inner surface of the 

 blade, especially towards the point; also the apophysis is broad and full of holes. The smaller form 

 simple. Spicules simple. Spines long and slender. 



Species : H. clegans (A. Ag.). 



Distribution: Australia (New Guinea, the Philippines). Archibenthal. 



Porocidaris Desor. 



Only large two-valved pedicellarise. The spines with very long neck. Spicules simple. 

 Species: P. purpurata W. Thorns. 

 Distribution: The Northern Atlantic. Archibenthal. 



Incerta scdis : 

 Dorocidaris panamensis Ag. 

 tiara Anderson. 

 alcocki 

 Stereocidaris tenuispinus Yoshiw. 



microtubcrculatus Yoshiw. 

 Porocidaris misakiensis 

 Sharreri Ag. 

 Milleri 

 Cobosi 



gracilis Doderl. 



Phyllacanthus australis Ramsay. 

 Goniocidaris Dodcrleini Ag. 



