Dec, 102(1] Cystids and Blastoids 69 



Locality and Horizon. — From the Racine dolomite at 

 Racine, Wisconsin. The Chicago University specimen is num- 

 bered 22914, and consists of the two parts described in the 

 preceding lines. The type of the species, numbered 2023, is 

 preserved in the American Museum of Natural History, and 

 consists of the cast of the interior of the anal tube and of the 

 top of the constricted part of the tegmen. 



Remarks. — While it is very probable that the Chicago 

 University specimen here described belongs to the same species 

 as the type of Crinocystites chrysalis, this is not absolutely 

 certain. The anal tube of the latter is more curved lengthwise, 

 is wider at the base, is more strongly clavate, and has a different 

 arrangement of plates toward the top of the anal tube. 



Eiicalyptocrinus prohoscidialis Miller (Plate I, Fig. 4 of 

 present paper), is a closely related species. 



The form most closely resembling Eiicalyptocrinus prohoscidi- 

 alis is Eucalyptocrinus egani Miller (Jour. Cincinnati Soc. Nat. 

 Hist., 3, 1880, PI. 4, Figs. 1-lc), from the Racine dolornite at 

 the Bridgeport locality, in Chicago, Illinois. From the figures 

 accompanying the original description of this species it is 

 evident that an anal tube extended above the platform formed 

 by wing-like processes, but only the five lower plates of this 

 tube are indicated on the cast of its interior, and it is not known 

 definitely how much longer the anal tube was. The original 

 specimen used for figure 1 c, accompanying the original descrip- 

 tion of this species, is in the museum of the Cincinnati Society 

 of Natural History. 



An anal tube rising above the platform of wing-like processes 

 occurs also in a specimen from Racine, Wisconsin, which closely 

 resembles Eucalyptocrinus nodulosus Weller, a cast of which is 

 preserved in the Springer collection in the U. S. National 

 Museum. 



All of these species with anal tubes projecting above the 

 platform of wing-like processes differ from Eucalyptocrinus 

 rosaceus (Goldfuss), the type of the genus, from the Devonian of 

 the Eifel, the anal opening of the latter consisting of a small 

 aperture between four plates at the center of the platform. 



Among European Calyptocrinids, the American species here 

 discussed resemble most the form originally described by 

 Phillips as Ily panthocrinites decorus. The latter also has an anal 

 tube distinctly rising above the platform of wing-like processes. 



