BATOCRINID^. 431 



Remarhs. — Meek and Worthen in 1865 (Proceed. Acad. Nat. Sci. Phila., 

 p. 164), intimated that probably this species was generically, and perhaps 

 specifically, identical with. AUoprosallocrinus coniciis ; but neither the one nor 

 the other is the case. That species has twelve arms, and these obviously 

 were given off from the calyx in a very similar manner as the arms of 

 Agaricocrimis ; while those of Dizygocriims eucrmics, to judge from the size of 

 the arm facets, were quite slender at their bases. 



Dizygocrinus eueonus var. abscissus (Kowley and Haee). 

 Plate XL VI. Fig. 9. 



1S91. Batocrintis aiscissus — Rowley and Haee ; Kansas City Scient., p. 115, Plate 3, Fig. 6. 



Syn. Batocrhius ceimstus S. A. Millee; AcIt. Slieets 17tli Rep. Geol. Suit. Indiana, 1891, p. 67, 

 Plate 11, Pigs. 11 and 12. 



This form agrees essentially with the preceding one. It is, however, 

 somewhat larger, has twice the number of arms, and the third palmars are 

 incorporated into the calyx, while they are free in the other. There are 

 thirty-two arms in the normal state, which are rather short and slender, 

 and decrease in size upwards. The arm plates are short. Ventral disk 

 decidedly conical, the plates slightly convex. 



Horizon and Locality. — Upper part of the Keokuk group, and lower part 

 of the Warsaw limestone ; Taylor Co., Ky., and at Boonville and Curry- 

 ville. Mo. 



Tyfe in the collection of Mr. R. R. Rowley, Fort Smith, Ark. 



Remarks. — Rowley and Hare's name Batocrinus abscissus was published a 

 month in advance of Miller's B. renustus. 



Dizygocrinus rotundus (Yand. and Shum.). 

 Plate XXIX. Figs. 3a-g, and Jf. 



1848. Aclinocrimtes — Christy's letters on Geology; Plate 1, Figs. 3 and 4. 



1855. Actimcriims roltindus — Yandell and Shcm. ; Geol. Rep. Missouri by Swallow, Part II., p. 191, 



Plate A, Figs. 2«, h. 

 1373. Batocrinus rotundus — Meek and Woethen ; Geol. Rep. Illinois, Vol. V., p. 367. 

 1881. Batocrinus rotundus — W. and Sr. ; Revision Palseocr., Part 11., p. 168. 

 Syu. Actinocrinus oblatus Hall; 1860, Suppl. Geol. Rep. Iowa, p. 38. 



Syn. Batocrinus oblatus — WniiriELD; Mem. Amer. Mus. Nat. Hist., 1S93, Vol. I., p. 12, Plate 1, 

 Figs. 21, 22. 



Form of calyx varying from ovate to depressed globose. Plates flat, the 

 surface perfectly smooth, and the suture lines indistinct. 



Basals small, forming a saucer-shaped disk, hexagonal in outline, slightly 

 excavated at the bottom. First costals twice their width, much narrower 



