116 
THE SCIENTIST. 
Batocrinus sweeti, n. sp. 
Plate III Fig. S, s ide view of the body. 
Natural size. 
Calyx, convex, nearly deep as the dome. 
Basal plates excavated for the column and 
expanded into a rounded rim about it. 
First radial plates hexagonal, once and a 
fourth as wide as long. Second radials less 
than the first, quadrangular, broader than 
deep. T hird radials scarcely larger than the 
second, pentagcnial, wider than high. The 
radials of the second order are two in num. 
ber, the second a bifurcating plate nnd both 
quite as large as the second and third radials 
of the first order. The radials of the third 
order are two in number, a little smaller 
than plates of the second order. A low 
angular ridge extends up each radial area 
bifurcating with the divisions of the rays. 
First plate of the azygous area is as long as 
wide hexagonal and as large as the first 
radials. Resting upon this plate are three 
large plates seven or eight sided. The other 
plates of the series can not well be made out. 
The first interradial piece is fully as laige as 
the first anal plate, length and breadth equal. 
Three smaller plates, longer than wide 
above the first interradial, two of them rest- 
ing upon it while the third extends between 
the arm-bearing plates. Low indisiinct ra- 
diating lines cross the interradial and azyg- 
ous platen from the centers to the suture 
angles. Each o: the rays except the anterior, 
give rise to four arms and there are 
eighte-n arm openings in all, the arm-bear- 
ing plates being divided into groups with a 
rather strong five-lobed appearance in a basal 
or top view. Dome convex, frustum of a 
cone, plates probably without ornamentation. 
Anal tube rather stout, sub-central. Column 
rathei large. Arm openings directed out- 
ward. 
The specific name is given in honor of 
Mr. Ralph Sweet, a young collector at Cur- 
ryvilie, Mo. 
Description from one specimen found near 
the base of the Keokuk Limestone on Indian 
Creek, six miles south-west of Curryville, Mo. 
This species rejembles B. davisi but is 
larger, has a five-lobed appearance in a b.isal 
view instead of a continuous rim, differs also 
in the apparent want of ornamentation of 
the dome plates and moreover it is from an 
entirely different horizon. 
Batocrinus oavisi, n. sp. 
Plate HI. Fig. 9 side view of the body. 
Natural size. 
Calyx bowl-shaped. Vault a depressed cone 
nearly as high as the calyx. The three ohl )ng 
basal plates form a low rim abjut the column 
First radials hexagonal, twice as wide as 
long. Second radials quadrangular and less 
than twice as wide as long. The :hird radial 
or first bifurcating plate p-^ntagonal and but 
little larger than the second radial, nearly 
twice as wid^i as 1 )ag. The two upper sloping 
sides of the third radial, each supports a 
series of two plates, the second of which is a 
secondary bifurcating plate. This lalter 
supports above^ two series of two plates each 
to the arm openings. Starling from the basalt, 
a distinct ridge passes up along the middle 
of the radial plates, forking on the bifurcating 
plates and passing to the arm-bearing pieces. 
The arm openings are twenty in number and 
directed outward, not noticeably divided into 
series. The first interradial plale, nine-sided, 
about as long as wide and nearly as large as 
the first radials, followed above by two series 
of two smaller plates and these in turn by 
two still smaller pieces. A minute piece 
may be seen still higher up. The plates 
bearing the arm openings meet in a contin- 
ous ring. 
First anal plate a little smaller than the 
first radial, hexagonal, width and length 
equal, supporting above three smaller pieces, 
the lateral ones being octagonal while the 
one in the middle is hept agonal. There are 
above, three very small plates. Vault pieces 
small, each with a small central spine dike 
node. Proboscis or ventral tube slender. 
