162 GEOLOGICAL SURVEY OF THE TERRITORIES. 
ference is also seen in the divisions of the rays, S. equalis having eight 
arms by the ultimate division of each postero-lateral ray. while S. gibsona 
has only five. In the former species also the joints of the upper part of the 
arms lack that zigzag arrangement which they have in the latter; and 
the general asperity of aspect of the latter is wanting ip the former. 
Position and locality.—Subearboniferous strata, probably equivalent 
with those.of the Keokuk division, Crawfordsville, Ind. 
SCAPHIOCRINUS GURLEYI White. 
Plate 40, fig. 3 a. 
Scaphiocrinus gurleyt White, 1878, Proc. Acad. Nat. Sci. Philad., p. 32. 
Body of medium size, or somewhat less; calyx roughly cup-shaped ; 
subradial, first anal, and first radial pieces prominent, the sutures being 
deeply impressed ; base nearly covered by the last joint of the column; 
subradial and first anal pieces as large as, or a little larger than, the 
first radials; the anterior and the two antero-lateral rays only are known. 
These rays consist of three pieces each, including the first radials, already 
mentioned as a part of the calyx, and upon the third ray the first bifurcation 
takes place, each secondary division being once more bifurcated at varying 
distances from the first. In the anterior ray the second bifurcation takes 
place upon tke eleventh piece from the first. Im the antero-lateral rays 
the second bifurcation takes place upon the ninth piece of the anterior 
branch of each of those rays above the first bifurcation; and upon the 
seventh piece in the case of the posterior branches of the same, re- 
respectively. Near the tips of some of the arms. there is still another 
bifurcation, the division of which, being very small, may be easily over- 
looked or confounded with the coarse pinnules. The pinnules are large, 
long, angular, and alternately arranged upon each side of the arms; 
each piece of all the divisions of the arms above the first bifurcation of 
the rays bearing only one pinnule. The backs ofall the divisions of the 
rays are rounded, and have little or no tendency to become angular, ex- 
.cept perhaps toward tbe extremities of the arms. Column composed 
of irregularly alternating larger and smaller pieces. Surface finely 
granular. 
Height of calyx, from base to top of the first radials, 3 millimeters ; 
breadth of the same at the top of the first radials, 4 millimeters; height 
of the type specimen from the base to the extremities of the arms, 28 
millimeters. 
The calyx of this species closely resembles that of S. gibsoni, es- 
pecially in the tumidity of the subradial and first anal pieces and in 
the character of the column, but it differs conspicuously from it in the 
number of arms and the character of their bifurcations, as well as in 
the surface markings and other details. 
Position and locality—Subearboniferous strata, probably equivalent 
with those of the Keokuk division Crawfordsville, Ind. * 
Genus ACTINOCRINUS Miller. 
ACTINOCRINUS WACHSMUTHI (sp. nov.). 
Plate 40, figs. 1 a and b. 
Body rudely subturbinate below the arms, the sides expanding grad- 
ually and with slight convexity up to near the arm-bases, where there is 
a more abrupt expansion; base broader than high, rather deeply notched 
* In the original description the locality was inadvertently given as llinois instead 
of Indiana. 
a 
