Dec, 1920] . Cystids and Blastoids 61 



Savagella Gen. nov. 



Recently Savage described a remarkable form from the 

 Orchard Creek shale, near Thebes, Illinois, under the name 

 Cyclocystoides ornatiis. The large plates forming the conspicuous 

 ring are similar to those of typical Cyclocystoides in being quad- 

 rangular in shape, but here the similarity ends. Along their 

 upper surface the plates are radially grooved, their inner face 

 is vertical, and their lower surface is convex, their radial cross- 

 section being subtriangular. There is no structure comparable 

 with the spoon-like ornamentation of typical Cyclocystoides, 

 moreover the steep inner face of the ring-plates must have been 

 correlated with an altogether different structure of the theca 

 interior to the ring. Therefore the new generic term Savagella 

 is proposed, with this species as the genotype. 



Cyclocystoides illinoisensis. — A fourth generic type is repre- 

 sented by Cyclocystoides illinoisensis Miller and Gurley, from the 

 same locality and horizon as Cyclocystoides ornatits. The ring 

 plates of this species are flattened, without conspicuous orna- 

 mentation, and their radial cross-section has a flattened elliptical 

 form. For this fourth generic type no new name is provided at 

 the present time although it is beheved that it will prove 

 distinct when better understood. 



These four genera — Cyclocystoides, Narrawayella, Savagella, 

 and the unnamed genus having Cyclocystoides illinoisensis as a 

 type — are included in the family Cyclocystoididce, proposed by 

 S. A. Miller (Jour. Cincinnati Soc. Nat. Hist., 5, 1882, p. 223), 

 with Cyclocystoides as the typical genus around which the others 

 are grouped. 



In proposing these new names it is fully realized that the 

 structure of these peculiar organisms is not fully understood. It 

 is believed, however, that the first step to their understanding 

 is to note that the species hitherto grouped under the single 

 term Cyclocystoides differ greatly in structi^re and probably 

 represent several distinct but closely related genera. 



13. Savagella ornatus Savage, 



(Plate I, Fig. 18.) 



Cyclocystoides ornatus Savage, Trans. Illinois Acad. vSci. 10, 1017, p. 265, 

 PI. 2, Fig. 1. 



Type: Disk 18 by 20 mm. in diameter. Submarginal ring, consisting 

 of 20 plates. The individual plates are about 1 mm. long in a radial 



