SMITHSONIAN INSTITUTION 
in this genus, as well as in Eucalyptocrinus, some duplication. The generic relations of the 
species were at first not understood, some being described under Eucalyptocrinus and some 
as a strange organism called by Hall Cryptodiscus, now known to be appendages of the 
Callicrinus tegmen. Weller was the first to point out this fact, and his studies upon the 
abundant material of the Chicago area did much toward clarifying our understanding of the 
American occurrences. 
Most instructive figures for the explanation of the genus are given by Bather in the 
Treatise on Zoology (Lankester), 3, 1900, p. 163. 
The exceptional species from the Laurel formation described by Wachsmuth and 
Springer from a single specimen can now be further illustrated, and some of its characters 
better defined. From fragments we know that there were other species in the same beds. 
Callicrinus beachleri Wachsmuth and Springer 
Plate p, figs. 8-1 g 
Calticrimis beachleri Wachsmuth and Springer, Am. Geoh, 10, 1892, p. 140; N. A. Grin. Cam., 1897, p. 355, 
pi. 83, figs. 14a, b. 
The series of figures from six specimens here given are especially directed 
to the surface characters of the dorsal cup, which is notable for the extremely 
high and sharp wavy ridges which traverse the plates from radials to arm-bases. 
In the type specimen this was much obscured by hard matrix, but these speci- 
mens occurred in a soft granular limestone readily removed by preparation. 
The smooth, decanter-shaped pyramid enclosed by the arms, with the very short 
partitions at the lower margin, are also well shown. 
Horizon and locality. Laurel limestone, Niagaran ; St. Paul, Indiana. 
Callicrinus sp. 
Plate p, figs. 14-15 
These are the terminal quadrant-shaped plates of the tubular tegmen which 
abut by fours, with a small anal opening in the middle. First described by Hall 
as Cryptodisciis, they have been thoroughly explained by Weller in his paper 
for the Chicago Academy, and Bather’s figures 2, 3 and 4, on page 163 of the 
Lankester Zoology, show how they go together. 
Horizon and locality. Laurel limestone, St. Paul, Indiana. 
Callicrinus sp. 
Plate p, fig. 16 
This is another of the cjuadrant plates which were only connected with 
their fellows by short sutures, and beyond that were produced into greatly 
elongated, rounded appendages. Doubtless these types represented different 
species, perhaps some of those described by Weller from the Chicago area, but 
we have only the fragments of this and the preceding form, which are too 
meagre for comparison of species. 
Horizon and locality, same as last. 
