Art. IX.] Herrick-Johnson, Geology of the Albuquerque Sheet, 215 
quoted. East of Sandia mountains, at San Antonio in a 
horizon above the Cephalopod shales. 
Scaphites sp ? 
Associated with the above are fragments of a smaller shell 
like S. nicolletti but agreeing with S. nodosus in the presence 
of node-like elevations near the umbilicus. 
Prionocyclus ivoolgari, Mantell. 
Plate XXVIII, Fig. i. 
This species occurs apparently in the Tres Hermanos sand- 
stone above the Gasteropod zone in Rio Puerco valley. This 
seems to be about the equivalent of the Fort Benton division. 
Vertebrata. 
In the sandy layers above the lignite in the Rio Puerco 
and also east of the Sandias at the same horizon are numerous 
teeth of sharks, among them specimens of Otodus as figured by 
Cope on Plate XXII of his Extinct Vertebrata of New Mex- 
ico. Part of the carapace of a turtle was found in the same 
beds. 
Plantae. 
Numerous plant remains are found in the shales accom- 
panying the lignite in the series above the Punta de la Mesa 
sandstone, but it does not seem desirable to attempt to discuss 
them at present. They do not seem to be of the Laramie flora 
and there are numerous marine fossils in the sandstone above 
the lignite belonging to the P'ox Hills fauna and closely resem- 
bling the fauna from the Punta de la Mesa itself. 
The Permian. 
Review of the Literatute. 
D. W. Johnson. 
Before referring to the work done in the Permian of New 
Mexico it may be well to review the literature hitherto pub- 
lished on the Permian of various localities at home and abroad. 
Probably no geologic age has claimed more attention and given 
