190 E. Bose — Permian of Coahuila, N. Mex. 



is only a local and lenticular swelling of the limestone, as 

 the fossils both in the cliff and in the intercalated bed of 

 limestone are the same. I have called this place Malas- 

 caclias No. 1. The limestone is full of fossils nearly 

 every^vhere, and I could distinguish the following forms : 

 Fusulina elongata, Composita cf. suhpolita, Spiriferina, 

 ProductuSj Martinia, Enteletes, and Camarophoria aff. 

 mutahilis. 



The fossils are well preserved; the limestones at times 

 are wholly made up of Fusulina, and the most common 

 forms of brachiopods are a rather large Enteletes and a 

 Composita. 



About 20 meters higher stratigraphically occurs an- 

 other calcareous bed intercalated in the dark clays and 

 sandstones. It does not form a cliff here, but continues 

 with about the same thickness in the creeks on both sides 

 of the spur. This upper limestone is not as massive as 

 the lower one and is rather more thin-bedded or lami- 

 nated and somewhat marly, in such a manner that in 

 places the fossils weather out free and can be picked up 

 loose. Some of the thin layers are made up of Fusulina, 

 while others are composed entirely of brachiopods. The 

 fossils are somewhat crushed, but I could distinguish the 

 following forms in this locality, which I call Malascachas 

 No. 2: Fusulina elongata, Productus aff. gratiosus, P, 

 sp., Spirifer aff. fasciger, Composita cf. suhpolita, 

 Hustedia aff. meehana, Dielasma, Uncinulus, and 

 Lyttonia. 



The next portion of the rock section is mostly com- 

 posed of dark clays alternating with greenish and brown- 

 ish sandstones, but part of it is not very well exposed. 

 About 200 meters stratigraphically above the last locality 

 the sandstones again dominate, showing here a yellow 

 to brown or even reddish color. Interbedded in them 

 occur zones of coarse conglomerate containing concre- 

 tions of limestone, while in other places a similar dark 

 limestone forms beds in the sandstone. I call this locality 

 Malascachas No. 3, and from it I got the following forms : 

 Waagenoceras dieneri, Stacheoceras sp. nov., Martinia, 

 Reticuliar (f), Composita cf. suhpolita, Hustedia ^ aff. 

 meekana, Richthofenia cf. uddeni, Myalina aif. permiana, 

 corals and gastropods. 



The ammonoids are very well preserved, and both 

 forms show the suture lines clearly and are easily deter- 

 mined. The brachiopods are somewhat crushed, but 



