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Show 408 APPENDIX B.- PAUBONTOLOGY. The specimens are all silicified, and I hare been unable to examine the central portion; the exterior, where weathered, presents the appearance of a bundle of the columns of Favorite*, except that they are generally four- sided, and the inner sides necessarily narrower than the outer ones. £ ^ PHRENTIS? MULTILAMELLA PLATB L FIO. 2. Coral free, turbinate, somewhat rapidly expanding, cells deep; lamellae numerous, thin; outer portion cellular. From the specimens in my possession, it cannot be positively determined that this fossil is a true Faphrentis, but many features induce this reference. Loc. Cloth Cap and Flat Rock, Great Salt Lake. X ^ UPHBENTIS 8TANSBURn, Hall, ( n. sp.) PLATB I. Fio. 8 a b. Turbinate, free, or attached only by a pedicel nearly straight or but slightly curved; cup rather deep; margin ( when entire) thin, lamellae numerous, thin, intermediate ones extending from the margin one- third to one- half the semidiameter; fossett distinct. Loc. Stanbury's Island, Cloth Cap, and Flat- rock Point, Great SahLake. Ktlyy^ r[ y , ^ t * A^' fiX, J LiTHOSTBcrfriON , ( sp. indet.) PLATB L FIO. 4 a b. Coral massive; cells of medium size, deep; lamellae crenulate. The specimen is much weathered, and, from the presence of an ochreous incrustation, the specific characters cannot be clearly described. It differs in the dimensions and other characters of the cells from two species of the carboniferous period known to me from localities east of the Mississippi River. Loc. Top of Stansbury's Island, Great Salt Lake. |