208 University of Texas Bulletin 



they differ from this as well as from M. conciliatus through the small dis- 

 tance between the two ventral rows of nodules. In these comparisons I 

 take as type of the species M. nodosoides, the specimen figured by Laube 

 and Bruder because this comes from the same locality as the originals of 

 Schlotheim, which were never figured. 



Similar to our specimens is also the small individual figured by Pervin- 

 quiere 1 as a typical M. nodosoides. 



Fritsch 2 figures a Mammites under the name of Ammonites conciliate 

 Stoliczka, and Kossmat 3 confirms the conclusion that this specimen is very 

 nearly related to the species from southern India; he notes that the main 

 difference consists in the involution. In this direction the Mammites con- 

 ciliatus Fritsch resembles more our species than that of Stoliczka. Though 

 in this latter species the external whorl barely covers the preceding one up 

 to the row of intermediate nodules, we observe that in the specimen fig- 

 ured by Fritsch the external whorl covers the preceding one nearly to the 

 row of umbilical nodules. 



The group of Mammites nodosoides has a quite universal distribution ; 

 it is represented in the lower Turonian of all Europe, of Africa, Asia, and 

 South America. In North America we probably find it represented by 

 Ammonites Loewianus White, 4 an observation previously made by Per- 

 vinquiere. 



Number of specimens: 3. 



Age: Lower Turonian (Salmurian), lower horizon. 



PSEUDASPIDOCERAS Hyatt emend. Pervinquiere 

 PSEUDASPIDOCERAS aff. FOOTEANUM Petrascheck 



1902: Mammites Footeanus Stoliczka, Petrascheck, Amm. d. sachs. Kreideform., p. 144, 

 pi. 9, fig. 1. 



Among the material collected by Dr. Haarmann in the lower horizon of 

 the Turonian of Cerro del Macho is a rather large, not very well preserved 

 but quite characteristic cephalopod, showing the following features : 



Shell moderately evolute with whorls of a subrectangular-oval cross- 

 section, much higher than broad. The flanks are flattened, the ventral 

 portion rounded. The umbilicus is moderately wide, the umbilical wall is 



1 Pervinquiere, Paleontologie Tunisienne, pi. 18, fig. 1. 

 2 Fritsch, Ceph. bohm. Kreideform., pi. 7, figs. 1, 2. 

 'Kossmat, Siidind. Kreideform., p. 22 (129). 



4 Stanton, Colorado Form., p. 178, pi. 43. figs. 3-4. Some authors write Am laevi- 

 anus but it must be Loewianus because the species was dedicated to Dr. Oscar Loew. 



