30 EXPLANATION OF THE PLATES. 
ASTERIAD A. 
Fig. 8.—PaLzastTER oBtusus, Forbes, sp. 
Uraster obtusus, Forbes, Mem. Geol. Surv., vol. ii., part ii., p. 463: Decadel, 
pl i., fig. 3; vol. ili., p. 289, pl. xxiii, fig. 1. P. obtusus, Siluria, third 
edition, p. 208; Foss. 31, fig. 1. 
From the? restored figure in Mem. Geol. Surv., vol. iii., fig. 1, of the under 
side, the upper surface being unknown; ib. p. 289. Professor Forbes re- 
marks that the contour of this fossil starfish strikingly reminds us of that 
of the living Uraster hispidus, but the structure of its dermal covering 
was very different. Decade 1, description of pl. i., p. 3. 
Caravoc or Bata Rocxs.—First fouad in ashy slates at Drumcannon, Co. 
Waterford, in 1846; since, by the Geol. Surv., at Moel-y-Garnedd, near 
Bala, North Wales; Professsor Forbes, Mem. Geol. Surv., vol. ii., part ii., 
p. 463 ; and Decade 1, description of pl..i., p. 3, and later, according to 
Mr. Salter, in ash beds, west of Bala Lake, Mem., Geol. Surv., vol. iii., p. 289. 
Fia. 9.—a, b. PRorASTER? SALTERI, Forbes, sp. 
Ophiura, Journ. Geol. Soc., vol. i., 1845, p. 20, pl. ix., fig. 45; Annals and 
Mag. of Nat. Hist., second series, vol. xx. 
Protaster, Siluria, third edition, p. 208. 
Teniaster, Mem. Geol. Surv., vol. iii., p. 289, pl. xxiii., fig. 3. 
From the figures in Mem. Geol. Surv., vol. iii., pl. xxiil., figs. 3-3 a, internal im- 
pression. This minute Ophiuroid Starfish, scarcely more than three-quar- 
ters of an inch broad, “ differs in its slender whip-lke arms from all the 
other species of Protaster or Teniaster.” 
It was long lost in the drawers of the late Professor Forbes; was re- 
covered some years since, and is now in the Woodwardian Museum, Cam- 
bridge. 
fay SiaTE.~-Pen-y-gaer, Cerrig-y-Druidion, North Wales; Mem. 
Geol. Surv., vol. iii., p. 290. 
