UINTACRINUS: ITS STRUCTURE AND RELATIONS. 7 



The specimens in this colony are mostly of adult individuals, — the calyx 

 measuring from 37 to 75 mm. wide as it lies crushed; these would have 

 been from 20 to 50 mm. in diameter in life, after allowino; for the flattenino-. 

 A few individuals — not over a dozen in all — were found in the young 

 stage, 15 to 25 ram. wide, representing diameters of 9 to 15 mm. 



Locality No. 2. — This was about half a mile from No. 1. Here a small 

 deposit of mostly very small Crinoids was found in place, — about 15 square 

 feet in all. They occurred in a similar manner and position to those of Lo- 

 cality No. 1, and the specimens were entangled in like manner by the arms 

 and pinnules. The specimens originally found by Mr. Martin at this place 

 were mostly disposed of to the Kansas University. By carefully searching 

 the debris, as further exposed by flood and wind, I succeeded in finding some 

 fragments of the plate containing a number of individuals. The occurrence 

 of this colony was noticed by Dr. S. W. Williston in the Report of the Uni- 

 versity Geological Survey of Kansas, Vol. II., p. 242, where he stated that it 

 " may belong to a distinct species, but is more probably the young of 

 socialis." 



Locality No. 3. — About twelve miles southeast of No. 1. Here I 

 found the weathered remains of an adult colony which had evidently been 

 of considerable extent, but most of it was destroyed by the erosion of the 

 beds. Fragments of thin slabs, with parts of arms and some calices, were 

 scattered over a space of several hundred feet along the exposure, — the 

 effect of wind and rain, — but at no place in position and unweathered. 

 The weathered specimens found here almost invariably have the arms closely 

 folded together, so that they look like bundles of parallel rods. None of 

 them are spread out, as is so common at Locality No. 1. The preserva- 

 tion of the arms and brachial plates is very fine, especially for showing the 

 syzygies, — both in a lateral view, and upon the apposed surfaces of the 

 brachials. Unfortunately in only a few cases was the base visible, — it 

 being usually either concealed or broken away. At this locality, about 

 three hundred feet from No. 3, there was found in place a small remnant 

 of the thin edge of another colony, from a different horizon, — being 

 apparently about three feet higher than No. 3, — but the Crinoids were in 

 poor condition. 



Liocality No. 4. — Five miles southwest of No. 1. Fragments only, and 

 the deposit not found in place. 



Locality No. 5. — Ten miles northeast of No. 1. Fragmentary remains 



