356 THE CRIXOIDEA CAMERATA OF NORTH AMERICA. 



consists of four plates, which are much narrower at the top than at the 

 bottom, and two of them are narrower than the others. Construction of the 

 anal tube, its length, and the structure of the arms unknown. 



Horizon and Locality. — Niagara group ; St. Paul, Ind. 



Ti/pe in the collection of Wachsmuth and Springer. 



Eemdrks. — The unique specimen from which the above description is 

 made, was discovered by Mr. Charles S. Beachler, a very enthusiastic collec- 

 tor, in whose honor the species is named. He has since found a second 

 specimen at the same locality. 



Callicrinus acanthinus Eixgueberg. 



Plate LXXXIII. Fig. 18. 



1890. RiNGUEBERG ; Auiials N. York Acad. Sci., Vol. V., p. 302, Plate 3, Tigs. 1 and la. 



The specimens from which this species was described are quite fragment- 

 ary, only showing portions of the dorsal cup, and nothing of its super- 

 structure, but enough is seen to indicate that the species is unlike any other 

 heretofore described. The dorsal cup evidently was very short, shorter even 

 than represented in Ringueberg's restored figure in the Annals, Plate 3, 

 Fig. 1, the lower euds broadly truncated, and almost as wide at the bottom 

 as at the top. The cup rests upon the median part of the large radials ; the 

 lower end of the plates curves inward to meet the four basals, and the upper 

 end abruptly upwards. 



The basals, together witli the lower part of the radials, form a deep 

 pentapetalous concavity, which at the inner side of the calyx is represented 

 by a short cone, rounded at the upper end. First costals twice as wide 

 as long, the suture lines convex ; the second a little longer, their sloping 

 upper faces at right angles. The first distichals in contact laterally, some- 

 what smaller than the upper costals, wider than long, the upper face con- 

 cave ; the second much smaller, and the arm-bearing palmars smaller still. 

 First interbracliials almost as large as the radials, a little longer than wide, 

 subrotundate in outline ; the two plates above elongate, and together-much 

 smaller than the first. The interdistichal very small, resting within a notch 

 formed by the first distichals. The faces supporting the partition walls 

 projecting considerably over those supporting the arms. The axillary costals 

 and first interbracliials are extended into long, rather sharp .spines, proceed- 

 ing from the middle of the plates and directed obliquely upward. In addi- 



