- 
296 FIELD COoLUMBIAN Museum — GEo.oey, VoLt. II. 
1894 Saccocrinus howardi S. A. M., 18th Rept. Geol. Surv. Ind., 
p?-284; Pl V5 Bigs3>5" 
1897 Pertechocrinus howard1 W. & Sp., N. Am. Crin. Cam., Vol. 
II, p. 529. 
Niagara Group, St. Paul, Indiana. 
HABROCRINUS ORNATUS Hall. 
1875 Saccocrinus ornatus Hall, Pal. Ohio, Vol. H, p. 126, Pl. VI, 
Figs. 7-9. 
1881 Pertechocrinus ornatus Wachsmuth & Springer, Rev. Pal- 
acocr be Limpeota 2. 
1897 Pertechocrinus ornatus Wachsmuth & Springer, N. Am. 
Crin. Cam., Vol. II, p.527, Pl.L, Figs:-2a—-byancee ee 
Rigve 7s 
Niagara group, Yellow Springs, Ohio. 
HABROCRINUS FARRINGTONI sp.nov. Plate LXXXVII, Figs. 1-5. 
The calyx is urn-shaped, with an expanded hexagonal base. The 
dome is not preserved. The plates of the dorsal cup are thick, depressed 
in the center, with low nodes near the angles. The sutures are sit- 
uated in deep furrows formed by the beveled edges of the plates. No 
radial ridges are found. The natural casts have a proriounced 
tubercle near the center of the radial and first anal plates, indicating 
a depression on the inner side of the plates, but no corresponding 
elevation, on the exterior of the plates, is shown in the natural mold. 
The natural casts are pyriform, pointed below and truncated above, 
somewhat constricted between the prominent arm bases. Arms, 
judging from the arm bases, two to each ray. 
Basals three, equal, forming a shallow hexagonal cup. Radials 
five, height and width about equal; the two anterior laterals heptag- 
onal, the others hexagonal. First costals hexagonal, about half the size 
of the radials; second costals smaller than the first, pentagonal, axil- 
lary, bearing the distichals upon their superior edges.. First distichals 
about twice as high as wide. Higher plates of the rays not known. 
First interbrachials hexagonal, equal in size or slightly larger than the 
first costals; they are followed by two somewhat smaller plates, and 
these by two still smaller which join with the plates of the dome. No 
interdistichal plates visible. The anal interradius has nearly the 
combined width of one of the rays and two interbrachial areas. The 
first anal plate is situated between the two posterior radials, resting on 
the basals. It is heptagonal in form and from its superior edge extends 
