io8 University of Texas Bulletin 



species from the Sosio beds. Girty^ described a Paraceltites elegans 

 from the Guadalupian of West Texas. 



A somewhat doubtful species, Paraceltites sp. indet., has been de- 

 scribed from the Russian Artinsk by Karpinsky^ and another species, 

 Paraceltites pseudo-opalinus, has been cited and figured from China 

 by Frech.^ The suture of this latter species is not known and its 

 sculpture is a little different from the other species belonging to the 

 genus, although it cannot be denied that a certain similarity in the 

 ground plan of the ornamentation exists. 



In our fauna, Paraceltites is represented by two species, both from 

 the same horizon and locality. They were found by Mr. Bowman, but 

 all the specimens are rather fragmentary. The suture could be 

 studied only in one of them and seems to be the same as described by 

 Gemmellaro; unfortunately it does not show on the outside of the 

 silicified sheU and could be seen only imperfectly on the interior side. 

 The sculpture is Hke that of the typical Paraceltites and there is no 

 doubt that our species belong to that genus. 



Paraceltites multicast atus n. sp. 

 PI. V, Fig. 19-32 



Shell discoidal, very evolute, much compressed on the flanks, rounded 

 on the venter, cross-section of the whorl elliptical, much higher than 

 broad; umbilicus very wide, no sharp umbilical shoulder developed, 

 umbilical wall not very steep, flank curving gradually onto it. The 

 outer whorl covers only part of the venter of the next one. 



The sculpture consists of numerous transversal ribs, about forty on 

 the outer whorl, while the next one has not quite thirty. These ribs 

 on the largest whorl are low, broad, rounded on the surface, beginning 

 at the umbilical seam where they are narrow and sharp, widening 

 rapidly on the flank and disappearing when they reach the venter. 

 They are radial or even slightly directed backward at the umbilical 

 wall and border, and from there on bend strongly forward. On the 

 body chamber the ribs become very indistinct and nearly obliterated, 



'Girty, Guadalupian fauna, p. 499, pi. 25, fig. 12-14. ' 



^Karpinsky, Amm. d. Artinsk-Stufe, p. 82, pi. 4, fig. 7. 

 '¥t. Freeh, Palaeoz. Faunen a. Asien u. Nordafrika, p. 56, fig. 3-a, b. 

 Idem, In Rlchth'ofen, China, V, p. 190. 



