. Bulletins of American paleontology. D A M^\ || Q) E L A ii^jn 1 y F A, A\^M. —1 -ff,. jL ^ \ Jmk 1 22 ^ Jr ^ S^^m 1 Jftl> .Av —-T^ w^^^^^w^ ^^ ^ ). Text-tigure 5\.—Narrow, high-spired gastropods with siphonal mC. D. Cerilhiiini alralwn. E. Cerilhiiim ul^icola. F Cerithium liltcn s at lower left and upper right of aperture. A,G, H. Cenlhiopsis fjreenil. Name.—Cerithium lunscanim Say. 18.^2. Biofacies.—Common in both Northern Subfaciesand both Central Biofacies. Uncommon to rare in otherbiofacies, except Rocky Shore and Grecian ,from which it was not recovered. Reference
. Bulletins of American paleontology. D A M^\ || Q) E L A ii^jn 1 y F A, A\^M. —1 -ff,. jL ^ \ Jmk 1 22 ^ Jr ^ S^^m 1 Jftl> .Av —-T^ w^^^^^w^ ^^ ^ ). Text-tigure 5\.—Narrow, high-spired gastropods with siphonal mC. D. Cerilhiiini alralwn. E. Cerilhiiim ul^icola. F Cerithium liltcn s at lower left and upper right of aperture. A,G, H. Cenlhiopsis fjreenil. Name.—Cerithium lunscanim Say. 18.^2. Biofacies.—Common in both Northern Subfaciesand both Central Biofacies. Uncommon to rare in otherbiofacies, except Rocky Shore and Grecian ,from which it was not recovered. References.—Mon-\^, 1975. p. 149. pi. 43. hg. 25;Abbott. 1974. p. 104, fig. 993; Rehder, 1981, p. 196; Abbott and Dance. 1982, p. 66. figured. Cerithium atratumText-figure 51C. DAMOCO TcLxon #.—2093 Diagnosis.—Shells with a pleural angle of 35-40degrees. Ornament of revolving rows of beads of dif- fering sizes, with the largest beads at or just above thewidest part of each whorl. Enlarged vertical ribs (var-ices) develop randomly over the shell, unlike the reg-ular vertical ribs in C. muscarum. Comparison.—The irregularly spaced varices arethe di
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