238 



as may be seen in specimens that liave liad a part of their outer volution 

 removed by weathering-. 



Dimensions very variable. 



Position and Locality.— Strata of the Upper Red Wall, north bank of 

 Wliite River, twelve miles soutliwest of Fort Apache, Arizona. A few 

 specimens of this species were also seen at several other places in the 

 Fort Apache region as follows: At the crossing of the government trail 

 on Carrixo Creek, on west bank of Cibucu Creek, one mile north of U. S. 

 Indian farmer's residence, and on the east edge of the bluff one half 

 mile iKirfhwest of agent's residence at White River. Arizona. 



CAMPHOPHYLLUM. 



[Milne Edwards and Haime, Brit. Foss. Corals, PI. LXYIII (1850).] 



CAMPHOPnYLLU:M TORQUUM. 



Plate, Figs. 2a,b.c. 



Simple, usually large, conical to subcylindrical corallum, which in 

 the case of specimens under three inches in length is usually bent or geni- 

 culated, but in larger specimens is nearly straight. Epitheca thin, with 

 small encircling wrinkles and strong undulations of growth. Calice not 

 seen. Septa very numerous, strictly radial in arrangement, extending 

 about two-thirds the distance from the exterior toward the center, stout 

 and usually straight Avithin the outer vesicular zone, but becoming attenu- 

 ated and somewhat curved or a little tlexuous in crossing the vesicular 

 area, where they alternate with an equal num1)er of very short, thin ones. 

 Visceral chamber filled with numerous imperfectly developed tabulpe, 

 which pass nearly horizontally across the cavity with a more or less 

 upward arching. Vesicular dissepiments highly developed in the periferal 

 portion, forming numerous obliquely ascending small vesicles. Entire 

 length unknown. 



Range and Distribution.— Red Wall Group. Fort Apache, White River. 

 Salt River, Carrixo Creek at the crossing of the government trail, and 

 on Cibicu Creek, one mile north of the U. S. Indian farmer's residence. 

 Arizona. 



