0PHIUR01DEA, CRINOIDEA. 
Ech. 23 
Tliyraster , n. g., for Echinasler serpentarius , M. & Tr. ; Ives. 
Tropidaster, Stiirtz, redescribed, pp. 205-208 ; Sturtz. 
Urasterella, McCoy, redescribed, pp. 219 & 220 ; id. 
Xenaster margaritatus, Simonowitsch, redescribed, p. 223 ; id. 
OPHIDROIDEA. 
Sturtz gives the following classification of palaeozoic Ophiuroids 
(pp. 245-247):— 
I. Suborder. Euryalid^e. 
Eucladia , Woodward, Ony chaster, Meek & Worthen, and 
perhaps Ilelianthaster rhenanus, Roemer, emend., 
Sturtz. 
II. Suborder. OrmuREAS. 
1. Family. Ophioencr master ice. 
Protaster, Forbes, &c. ; Tceniaster , Billings ; Eugaster , Hall ; 
Palceophiura , Sturtz ; Bundenbachia , Sturtz. 
2. Family. Palceamphiuridce ( Protophiurece ). 
1st Group. Ophiura lymani, Sturtz. 
2nd Group. Protaster , Salter ; Furcaster, Sturtz ; 
Ophiura zitteli , Sturtz. 
3rd Group. Ophiura ( Ophioscolex ) primigenia, 
Sturtz ; Ophiura decheni, Sturtz. 
Bundenbachia beneclcei , Stiirtz, redescribed, pp. 216 & 217 ; Sturtz. 
Furcaster palceozoicus , Sturtz, redescribed, pp. 214 & 215, taf. xxxi, 
figs. 40 & 40a ; id. 
Helianthaster rhenanus , Roemer, emend. Sturtz, redescribed, pp. 218 
& 219, taf. xxvi, figs. 14a, 15, 15a, taf. xxvii, fig. 14 ; id. 
Ophiura primigenia , Sturtz, redescribed, pp. 210 & 211, taf. xxvi, figs. 
6, 6a, & 7 ; O. decheni , Sturtz (= Eoluidia decheni ), redescribed, pp. 
211-213, taf. xxvi, figs. 10, 10a, & 11 ; O. zitteli , Sturtz (= Palastropecten 
zitteli ), redescribed, pp. 213 & 214, taf. xxvi, figs. 12 & 13 ; StOrtz. 
Ophiurina lymani , n. sp., p. 232, taf. xxxi, figs. 36, 36a, & 37 ; id. 
Palceophiura solida , n. sp., p. 233, taf. xxxi, figs. 38, 38a, & 39 ; id. 
Protaster miltoni , Salter, redescribed, pp. 215 & 216 ; P. brisingoides , 
Gregory, redescribed, pp. 217 & 218 ; id. 
CRINOIDEA. 
Bather (1) gives the following classification of the Inadunata 
Fistulata : — 
(?) Family Hybocrinidce. Hybocrinus, Hoplocrinus, Bcerocrinus. 
Group a. — 1. Heterocrinidce. 
2. Calceocrinidce. 
3. Catillocrmidce. 
