32 
SMITPISONIAN INSTITUTION 
are common to all the specimens. It is probable that the specimen named by 
Miller and Gurley Macrostylocrinus indianensis, Bull. 6, Illinois St. Mus., pi. 3, 
fig. 33, belongs to this genus, but the figure is too indistinct for comparison. 
Horizon and locality. Laurel limestone, Niagaran; St. Paul, Indiana. 
Patelliocrinus rugosus new species 
Plate 6, figs. 16-18 
With its strong rugose sculpturing, this species may be distinguished from 
the preceding by the great preponderance in size of the radials. 
Horizon and locality, same as last. 
Patelliocrinus laevis new species 
Plate 6, figs, ig, 20 
Differs from the two preceding by its perfectly smooth surface and greater 
elongation of calyx. 
Horizon and locality, same as last. 
genus and species indet. 
Plate 6, figs. 2i-2ih 
An apparently complete crown, having a low calyx of smooth, rounded 
plates, three small unequal BB, large RR followed by a single IBr which is 
axillary, filling most of the distal face of the R, and supporting two stout, biserial 
arms. There seems to be a single iBr, mostly not very well defined, but with 
the posterior one the largest, and no other indication of anal structures. It 
would seem that with so many details available it should not be difficult to de- 
termine the systematic position of this fossil, but after repeated efforts, aided 
by consultation with colleagues, I am still obliged to confess my inability to 
treat it intelligently. It is doubtless a new genus, but where to place it, I do not 
know. So I am giving the facts as I and the artist see them, and leaving it to 
others to continue the guessing. 
Horizon and locality. Beech River formation, Niagaran; Decatur County, Tennessee. 
LAURELOCRINUS new genus 
Plate 7 
This genus is proposed for an assemblage of peculiar forms from the 
St. Paul beds, which will not fit into any already known. But for the tripartite 
base it might go under Clonocrinus , but that would mean rather wide variation 
from the type. Our specimens, while in considerable number, are all deficient 
in the upper part of the calyx and crown, so that we are without information 
