294 PROP. p. M. Duncan's eevision of the 



Grenus Discocidaris, Anaulocidaris, ScJileinitzia, Eocidaris. 



G-enus Hyposalenia, Pseudosalenia, Poropeltis, Tiaris, JEemi- 

 pygus, Pseudodiadema, Teto^agramma, Sehertia, JEcMnodiadema, 

 Verr., Trichodiadema,Plesiodiadema, Loriolia, Golpotiara, Oarelia, 

 Savignia, GomphecMnus, Micropeltis, Agarites, Pygomma, Echi- 

 nocidaris, Desm., Coptechinus, Opechinus, Heliocidaris, CJiryso- 

 melon, ELipponoe, Seliechinus. 



G-enus Mortonia (Gray), Eumphia, Peronella, Polyaster, MicJie- 

 linia, Amphiope, LolopTiora, Galerites, Trematopygus, Parapygus, 

 Oolopygus, Anthohrissus, Clypeolampas, Trochalia, Asterobrissus, 

 Petalaster, Cyrthoma, Pseudopygaulus, Ananchytes, Oolaster, 

 Stegaster, Cibaster, Pygopistes, Toxaster, Seteraster, Miotoxaster, 

 Qlobator. 



G-enus Trachyaster, Ditremaster, Bachiosoma, Pliolampas, 

 Thegaster, Pseudholaster, Hypopy gurus, Atrapus, Abatus, Desoria, 

 Leucaster, Tuberaster, Plesiaster, Opissaster, Periaster, Perio- 

 naster, Paraster, Anisaster, Brissomorpha, Seterobrissus, Iso- 

 pneustes, Leiopneustes, Plagionotus, XantJiobrissus, Toxohrissus, 

 Kleinia, Stoonaporus, Deakia, Verbeekia, Ooncophorus, Peri- 

 pneustes, TracJiypatagus, Sarsella, Leskia. Microsoma is recorded 

 only. 



The following genera are now considered to be o£ subgeneric 

 value : — 



G-enus (now subgenus) G-oniocidaris, Goniopliorus, Seterosa- 

 lenia, Semidiadema, Hypodiadema, Pseudocidaris, Asterocidaris, 

 Acropeltis, Microdiadema, Dialemopsis, IPemipedina, Echinodia- 

 dema, Pseudopedina, Leiosoma, Pleurechinus, Salmacopsis, Psam- 

 mechinus, EvecJiinus, ScuteUina, Mono sty chia, EchinaracJinius, 

 Monophora, Astriclypeus, Nudeopygus. Phynchopygus, Ilardouinia, 

 PygorJiynchus, Clypeopygus, Oriolampas, Jeronia, Lampadaster, 

 Entomaster, Opisopneustes, Infulaster, Macraster, Tripylus, Moi- 

 ropsis, Meoma, Cyclaster, Loncophorics, Plesiaster, and Macro- 

 pneustes. 



The following are new genera: — Eodiadema, Placodiadema= 

 Plesiodiadema, Dune, Peronia, E china cidar is, Goniopneustes, 

 DiplotTiecanthus, Plesianfhus, Lanieria, Hagenowia, Neopneustes, 

 Pseudasferostoma, Adelopneustes, Gauth., Guettaria, G-auth. 



The following are new subgenera: — Gagaria, EcTiinites, non 

 auct., Mellitella, Eochmostoma, Oligopodia, Studeria, JKilletda. 



