﻿schuchert] siluric and devonic cystidea 2 6i 



Camarocrinus have been gathered, no crinoids have been seen. I he 

 only other Echinoderma from these layers is a single specimen ol 

 Trimerocystis peculiaris. 



Indian Territory and Oklahoma. — In 190] Dr. E. < >. Ulrich, while 

 engaged on stratigraphic work in Indian Territory, also found 

 Camarocrinus very plentifully. Letters to the writer dated Septem- 

 ber S and October I, 1901, state: 



" Of Helderbergian fossils perhaps my principal find is the dis- 

 coverj of a well-marked Camarocrinus bed, which 1 have traced over 

 50 miles [later he extended its range to 100 miles | and from which 

 I have procured something like 400 select specimens — ranging in 

 diameter from 1 to 5 or 6 inches. Without much trouble I might 

 have collected a thousand. To show their abundance will say that I 

 took about one of every ten seen. 



" You ask about other crinoids associated with Camarocrinus. 

 Only at two localities did I find anything of that kind in that bed. I 

 am fully satisfied that what you call the ' bulb ' is all there is, or ever 

 was. to the fossil. There is absolutely not a sign of other crinoidal 

 matter in most of the deposit containing Camarocrinus." 



To show the mode of occurrence and abundance, Mr. Ulrich pro- 

 cured a small slab measuring 25 X 13 cm- 0n the upper surface 

 (see plate xliii) it shows 5 specimens having diameters ranging be- 

 tween 3.5 and 10 cm. Not one of these has the stalk end turned 

 upward, there are no stalk fragments in the matrix, and but few 

 scattered plates of crinoid brachia. The latter may belong to Edrio- 

 crinus, as the basal portion of this crinoid is often found attached to 

 Camarocrinus ulrichi. It is noteworthy, also, that this slab was col- 

 lected at one of the two localities in which a few fragments of other 

 Crinoidea were found in association with Camarocrinus. 



Tennessee. — In southwestern Tennessee, in the valley of Tennessee 

 river, Mr. Foerste found many specimens of Camarocrinus saffordi 

 ranging through the lower 50 feet of the Linden formation. This 

 geologic horizon is about the equivalent of the New Scotland of the 

 New York Helderbergian. The species was found at several places, 

 and the present writer found three specimens considerably farther 

 northwest, in Benton county. Nowhere in this region, in the strata 

 here referred to, are the thecse of crinoids found, nor does Mr. Foerste 

 mention finding crinoidal limestone or fragments of crinoid columns. 

 The waiter saw only crushed Camarocrinus in Benton county and no 

 crinoidal fragments. 



It should be noted that the southwestern occurrences of Camaro- 

 crinus (i. e., in Tennessee and Indian Territory), are in the New 



