THE SCIi^sTIST. 
101 
conciive. E icii ;iu-ibiil;ici'iini api)ears 
as a double rid«>-e above the suiface. 
Anal opeuino: large, with a strong 
projection behind it. The hydro- 
spire slits can not well be made out. 
In one specimen the central opening and 
adjoining ends of the amijnlacra are 
arched over with a covei-ing of minute 
pieces. Phe interradial and anal pieces 
have each a central ridge and ai-e ()rna- 
niented by strong lines parallel with the 
suture below. Beginning with tlie radio- 
interradial suture and extendiug and 
spi;eading downward to the point-like 
projections of the ambulacra there is in 
eacli radial Held a lanceolate area 
strongly marked Jongitudinall.y b}^ linear 
elevations while the radials either side of 
an ambulacrum are cross-striate, as the 
interradials above. The linear markings 
of the lanceolate \ields are parallel with 
the radial sutures. The basal plates are 
similarly orniimented. 
The outline in this fossil is strikingly 
like a Granatocrinus and might be mis- 
taken for G. neglectus but the lanceolate 
areas, strong linear markings and entire 
absence of granules, widely separate the 
forms. This species is con-generie with 
Meek and Wortheu's Godonites gracilis 
from which it diflers in its smaller size, 
more oval outlisie of body, much greater 
length of ambulacra, longer interradials, 
mu(-h more promiuent anal proboscis and 
in the central ridge of the interradial 
and anal pieces. 
Collected in the Lower Burlington 
series at Louisiana, Mo. The cabinet 
contains seven or eight specimens from 
which the description has been made. 
POTERIOCRINUS WALTERSI, U. Sp! 
Plate II. Fig. 15. side view of the cahjx. 
Calyx an inverted frustrum of a cone, 
width a little greater than the length. 
Under basals large, flattened below with 
scarcely any basal cavity. Under basals 
wider than long, Basals large, hexagon- 
al, width and depth about equal. First 
radials once and a half as wide as long, 
pentagonal. The shallow sinuses for the 
reception of the second radials is nearly 
the entire breadth of the superior edges 
ot the lirst radials, with a strong sharp 
ridge, lengthwise of the scar. Anal 
plate about as large as an under basal, 
hexagonal, resting on the upper edge of 
a basal, and between two radials; height 
and width about equal, extending up- 
ward beyond the radials. The basal on 
the anal side is the largest plate in the 
body and truncate instead of angled 
above. 
Plates siuooth, sutures well defined. 
This species resembles Shumard's P. 
meekanus, but is much smaller, longer in 
in proportion to the width, with less 
thickness of plates, and with scarcely 
any concavity below, the bottom being 
almost flat. But one specimen found, 
at the very base of the Lower Burling- 
ton Limestone at Louisiana, Mo. 
Specific name given in honour of JMr. 
Edwin Walters, of Kansas City, Mo. 
ACTINOCllINUS PUTEATUS, U. Sp. 
Plate II. Fig. 16^ side view of the body 
loith the right anterior rays in front. 
Calyx inversely bell-shaped. Vault 
less convex than the calyx. Depth of 
the entile body equal to its greatest 
width. Basal plates shallow, slightly 
projecting as a rim, excavated for the 
column. First} radials a little wider than 
high, hexagonal. Second radials about 
half as large as the first radials, width 
greater than the length, hexagonal. 
Third radials less than the second radials 
in size, length and breadth about equal, 
pentagonal, supporting on their upper 
sloping edges two hexagonal or heptagon- 
al secondary bifurcating plates. Above 
each of these are two plates with arm 
openings, making in all twenty such 
openings. 
The first anal plate is in line with the 
