178 University of Texas Bulletin 



so narrow that there is probably no more room than for an antisiphonal 

 lobe, which makes it probable that we have a similar case as in 

 Paralecanites Arnoldi. In our species the siphonal lobe is divided by a 

 low saddle. There are the high external and first lateral saddles while 

 the next one is extremely low and apparently has to be considered as 

 an auxiliary saddle. The first lateral lobe is deep, while the next one 

 is much smaller and may be considered as an auxiliary lobe ; another 

 lobe is visible in part near the umbilical seam. If our interpretation 

 is right, we would have the same case as in P. Arnoldi. We would 

 then regard the smaller lobe following the first lateral as the second 

 lateral, and the lobe partly visible on the umbilical seam as an internal" 

 lobe. There would be no second lateral saddle but the small saddle 

 following the first lateral would have to be regarded as the first lateral 

 saddle of the internal suture. As long as the internal suture of this 

 species is unknown, there is no possibility of proving our contention, 

 but the case of P. Arnoldi makes it very possible that our species 

 really belongs to Paralecanites and differs from the type by showing 

 some of the internal elements beyond the umbilical seam. 



Paralecanites has been first described from the Bellerophon lime- 

 stone of the Alps, the highest member of the Alpine Permian, and cer- 

 tainly much younger than the beds in which our species has been found. 



Paralecanites altudensis nov. sp. 

 PI. XI, Fig. 28-45 



Shell discoidal, evolute, strongly compressed on the flanks, rounded 

 on the ventral part, whorls not deeply embracing; cross-section sub- 

 oval, much higher than broad; greatest width about one-third above 

 the umbilical seam. No umbilical shoulder is developed, the flank 

 curving gradually down to the umbilical seam; the umbilical wall is 

 little defined and has an incHnation of not more than 30°. The um- 

 bilicus is very wide and shallow. No constrictions are visible on the 

 whorls. 



All the specimens are casts; no trace of ornamentation is visible. 

 The body <:hamber seems to be more than one whorl long. 



The septa are not very near together ; the external suture (pi. XI, fig. 

 35) forms a straight line. The siphonal lobe is not very deep but 

 broad and divided in two branches by a low median saddle. Each of 



