ECHINOIDEA. I. 29 



Species: C. affinis Phil., Reini T>o^ex\.^ tribuloidcs Laiiik., galapagensis Doderl., metularid Lamk., 

 Thouarsii Val., vcrticillata Laiiik., baculosa Lanik. 



Distribution: Cosmopolitan in the warm seas; the Mediterranean, Japan. I^ittoral - sub- 

 littoral forms. 



Chondrocidaris A. Ag. 



Large globiferous pedicellariae with large, cordate opening, the lower limit of which forms a 

 projecting lip; the opening reaches the point; no end-tooth; no limb on the stalk. Small pedicellariae 

 with a more or less developed end-tooth. Tridentate pedicellarije simple (rather highly dentate). 

 Spicules simple. 



Species : Cli. gigaiitca A. Ag. 



Distribution: The Sandwich Islands, IMauritius. Littoral. 

 Acanthocidaris \\. g. 



Large globiferous pedicellariae with large opening, irregularly limited below and reaching 

 the point; no end-tooth; no limb on the stalk. Small pedicellarise of the same structure as the large 

 ones. Tridentate pedicellaria; with delicate, dentate lamellte in the blade. Spicules simple. The spines 

 long, compressed, curved. 



Species: A. curvatispinis (Bell). 



Distribution: Mauritius. Littoral (?). 

 Stereocidaris Pomei. 



Large globiferous jDedicellariae with large opening reaching quite to the point; no end-tooth; 

 no limb on the stalk. Small pedicellariae of the same structure, without end-tooth. Tridentate pedi- 

 cellaricc simple. The spicixles often larger, fenestrated plates; in some species simple. 



Species : St. japonica Doderl., graiidis Doderl., sccptrifcroidcs Doderl., iiidica Doderl., ingolfiana 

 n. sp., niitrix (Wyv. Thoms.), caiialicitlata (A. Ag.), Mortcnsciii (Koehler), (?) i)iccrta (Koehler). 



Distribution : Cosmopolitan. Littoral-archibental forms. 

 Goniocidaris Desor. 



Large globiferous pedicellariae with rather small opening reaching the point; no end-tooth. 

 The valves very short and broad. No limb on the stalk. Small pedicellariae with powerful end-tooth. 

 Tridentate pedicellariae seem not to be found. Spicules of the common form. The spines more or less 

 irregularly widened. The test with deep impressions in the angles between the plates. 



Species: G. tubaria (Lamk.), gfraitioidcs (Lanik.), hiscrialis Doderl., umbraculum Hutton. 



Distribution: Australia, Japan. Littoral-sublittoral forms. 



Subgen. Discocidaris Diklerl. 

 Pedicellariae chiefly as in Goniocidaris. The spines most frequently much widened at the point 

 and with basal widening. 



Species : D. clypeata Doderl, mikado Doderl., (?) scrrata n. sp. 

 Distribution: Japan, the Philippine Islands. Sublittoral forms. 



Petalocidaris n. g. 

 Large globiferous pedicellarice with small terminal opening, the blade somewhat elongated. 



