THE FOSSIL CRINOID GENUS DOLATOCRINUS AND ITS ALLIES. 55 



very well. They are good examples of the bursiform calyx. But 

 for the lower and smoother tegmen, which may both be incidental 

 to fossiUzation, they could not be distinguished from the foim in- 

 cluded under Uneolatus. A form strongly resembling these occurs 

 in the Hamilton of Thedford, Ontario. 



Horizon and locality. — Hamilton (Sellersburg) , limestone: Clarks- 

 town, Indiana, and vicinity. 



DOLATOCRmUS GREENEI Miller and Gurley. 



Plate 14, figs. 7-9; plate 16, fig. 3. 



Dolatocrinus greenei Miller and Gurley, Bull. 4, 111. St. Mus., 1894, p. 28, 

 pi. 3, figs. 10-12.— Rowley in Greene, 1903, p. 158, pi. 47, figs. 4-6. 25. 



Dolatocrinus corporosus, var. concinnus Rowley in Greene, 1903, p. 148, pi. 44, 

 figs. 4-6. 



The more distinct radiating striae furnishes the slight ground for 

 separating this from the corporosus form, and the distinction becomes 

 decidedly hazy when the intermediate indianensis form is brought 

 into connection with the others. All the specimens are large, with 

 flattened tegmen, and the tendency is toward the maximum number 

 of aims. The type of greenei is abnormal in having two rays larger 

 than the others. Rowley's specimen is perhaps the most character- 

 istic. Of five specimens in the Gurley collection labeled greenei, 

 two have the specified number of 19 arms, two 18, and one 16; the 

 last three labeled "small specimens,'' apparently by Mr. Miller 

 himself. 



Horizon and locality. — Hamilton (Sellersburg) , limestone: Louis- 

 ville, Kentucky, and vicinity. 



DOLATOCRINUS LINEOLATUS MUler and Gurley. 



Plate 13, figs. 13-18; plate 14, figs. 10, 11; plate 15, fig. 7; plate 16, fig. 8. 



Dolatocrinus Uneolatus Miller and Gurley, Bull. 4, 111. St. Mus., 1894, p. 27, 



pi. 3, figs. 7-9. 

 Dolatocrinus sacculus Miller and Gurley, Bull. 7, 111. St. Mus., 1896, p. 58, 



.pi. 3, figs. 11, 12. 

 Dolatocrinus salebrosus Miller and Gurley, Bull. 7, p. 59, pi. 3, figs. 1.3-15. 

 Dolatocrinus charlestownensis Miller and Gurley, Bull. 8, 1896, p. 44, pi. 3, 



figs. 10-12.— Rowley in Greene, 1903, p. 153, pi. 45, figs. 7-9. 

 Dolatocrinus dstula Miller and Gurley, Bull. 9, 1896, p. 46, pi. 3, figs. 1-3. 

 Dolatocrinus asper Miller and Gurley, Bull. 9, 1896, p. 47, pi. 3, figs. 10-12. 

 Dolatocrinus eicosidactylus Wachsmuth and Springer, N. A. Grin. Cam., 1897, 



p. 319, pi. 26, figs. 5a-d. 

 Dolatocrinus springeri Rowley in Greene, 1903, p. 136, pi. 39. figs. 9-11. 



The type included under the above name is the most abundant 

 form in the present group. There are about 30 specimens in the 

 collection which probably belong together, ranging in size from 

 15 to 35 mm. in height and 20 to 50 mm. in w-idth. In 20 of these 

 the arms can be counted, and about 75 per cent of them have from 



