1042 DR, J. W. GREGORY ON THE CLAssiricarion  [Dee. 15, 
Synopsis of Classification. 
Class STELLEROIDA. 
Subclass OPHIUROIDEA. 
Order I. Lysophiure.—Ambulacral ossicles alternate, free. No 
ventral arm-plates. 
Fam. 1. Prorastrr1p®. Boot-shaped ambulacral ossicles. 
Genera.—Protaster, Forbes. 
Bundenbachia, Stiirtz. 
Fam. 2. Panmorniurip®. Long bar-shaped ambulacral 
ossicles. 
Genera.—Sturizura, Greg. 
Paleophiura, Stiirtz. 
Teniura, Greg. 
Eugaster, Hall. 
Ptilonaster, Hall. 
Order II. Streptophiure. Vertebral ossicles present, with more or 
less Streptospondyline articulations 
Fam. 1. Oputurtyip®. Ambulacral ossicles _ slightly 
united and no ventral arm- 
plates. 
Genera.— Ophiurina, Stiirtz. 
Tremataster, Worth. & Mill. 
Fam. 2. Lapwortaurtp®. Ambulacral ossicles fused. 
No vyentral arm-plates. 
Madreporite dorsal. 
Genera.—Lapworthura, Greg. 
Furcaster, Stiirtz. 
Palastropecten, Stiirtz. 
Fam. 3. Eoturpipm. Vertebral ossicles. Ventral arm- 
plates, but no buccal shields. 
Genera.—Lolwidia, Stiirtz. 
Eospondylus, Greg. 
Miospondylus, Greg. 
Aganaster, Mill. & Gurl. 
Cholaster, Worth. & Mill. 
Fam. 4. OnyoHastprRip®. Contorted unbranched arms. 
Integument granular. 
Genus.—Onychaster, Meek & Worth. 
Fam. 5. Evotapip2. Contorted branched arms. In- 
tegument granular. 
Genus.—Lucladia, H. Woodw. 
