ECHINOIDEA. I. 



29 



Species: C. affinis Phil., /?(7«/ Doderl., tribnloides Lamk., galapagensis Doderl., iiictnlaria Ivamk., 

 Thotiarsii Val., vcrticillata Lanik., baculosa Lanik. 



Distribution: Cosmopolitan in the wariii seas; the Mediterranean , Japan. L,ittoral-sub- 

 littoral forms. 



Chondrocidaris A. Ag. 



Large globiferous pedicellariæ 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 pedicellariæ 

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

 Spicules simple. 



Species : Ch. gigaiitca A. Ag. 



Distribution: The Sandwich Islands, ^Mauritius. Littoral. 

 Acanthocidaris n. g. 



L,arge globiferous pedicellariæ with large opening, irregularly limited below and reaching 

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

 ones. Tridentate pedicellariæ with delicate, dentate lamellæ in the blade. Spicules simple. The spines 

 long, compressed, curved. 



Species: A. ctirvatispiiiis (Bell). 



Distribution: ^lauritius. Littoral (?). 

 Stereocidaris Pomel. 



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

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

 cellariæ simple. The sjaicules often larger, fenestrated piates; in some species simple. 



SjDecies : .S7. japoiiica Doderl., grandis Doderl., sceptri/eroidcs Doderl, indica Doderl., ingolfiaiia 

 n. sp., inttrix (Wy v. Thoms.), canaliculata (A. Ag.), Morfcnsciii (Koehler), (?) iuccrfa (Koehler). 



Distribution : Cosmopolitan. Littoral-archibental forms. 

 Goniocidaris Desor. 



Large globiferous pedicellariæ with ratlier small opening reaching the point; no end-tooth. 

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

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

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



Species: G. titbar ia (Lamk.), gcraiiioidcs (Lamk.), biscrialis Doderl., iDiibraculiini Hutton. 



Distribution: Australia, JajDan. Littoral-sublittoral forms. 



Subgen. Discocidaris Doderl. 

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

 and with basal widening. 



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

 Distribution: Japan, the Philippine Islands. Sublittoral forms. 



Petalocidaris n. g. 

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



