78 CRETACEOUS GROUP 
I formerly referred this species to S. cor marinum, 
from which it is distinct. 
The S. stella of the former edition of this synopsis, 
figured in plate iii, fig. 18, and in American Journal of 
Science, vol. xviii, pl. iii, fig. 11, is the young of this 
species, which is now found to be abundant in the arena- 
ceous strata of Alabama, especially at Prairie Bluff. I 
first found it in the calcareous beds on Timber creek, 
New Jersey. 
2. S. ungula, (S. G. M,) Pl. x, fig. 6. 
Specific character. Wery compressed, with five excavated 
ambulacra; apex central. 
From the arenaceous strata of the Chesapeake and De- 
laware canal. ‘The very elevated posterior end of the 
former species is a striking and constant difference be- 
tween it and the 8. ungula. 
ANANCHYTES, Lam., Park. 
1..A. cinetus, (S. G.M.) Pl. i, fig. 1% 
Amer. Journ. Science, vol. xviii, pl. ili, fig. 7. 
Specific character. Cordiform, with five pairs of dotted am- 
bulacra, the posterior pair being in a deep sulcus extending to 
the base. ) 
Common in the calcareous strata of New Jersey. 
2. A. fimbriatus, (S.G. M.)_ PI. iii, fig. 20. 
Amer. Journ. Science, vol. xviii, pl. ii, fig. 9. 
Specific character. Cordiform, with five pairs of dotted am- 
bulacra, the posterior pair being in a sulcus extending to the 


