List of Loii.-er Silurian dossils, Cincinnati Group. 75 



Family BJiynchoneUidce. Gr. rlmgchos, a beak. 

 Genus Ji?iynchonella, Fischei*. 



296 Rli3-uchoiiella capax, Courad. L. cajuix, large. 



297 dentata, Hall. L. dei,is, a tooth. 



298 perlamellosa, Whitfield. L. per ; lamella, a thin plate. 



Family Spiriferidoi. L. spira, a spire ; fero, I carr3\ 



Genus Tremafospira, Hall. Gr. frema, a foramen; spira. 



300 Trematospira quadriplicata, S. A. Miller. L. quatuor, four; ^^Z/co, 



I fold. 



301 granulifera, Meek. L. granum^a, gvix.\n\fero. 



Genus Zygospira. Hall. Gr. zugon, a 3'oke; L. spira. 



302 Zygospira Ciucinnatieusis, James._ 



303 modesta, Say. L. modestus, small. 



304 modesta rar. Kentuckyensis, James. 



305 Headi, Billings. 



306 concentrica, Ulrich. L. concentricus, having a common 



center. 



Family StrophomenidcB. Gr. strojihos, bent; ynene, crescent. 

 Genus Strophomena., Rafinesque. 



307 Sti'ophomena alternata, Conrad. L. alternus, alternating. 



308 Alternata, var. alternistriata, Hall. L. alternus; striatns, ribbed. 



309 var. fracta, Meek. L. f range, I break. 



310 var. loxorhytis, Meek. Gr. loxos, oblique; rhutis, wrinkle. 



311 var. nasuta, Conrad. L. nasutus, long nosed. 



312 squamula, James. L. sqnamula, a little scale. 



313 declivis, James. L. declivis, sloping. 



314 Philomela, Billings. Mythological. 



315 tenuiiineata, Conrad. L. tenuis, fine; lineatus, lined. 



316 rhomboidalis, Wilckens. Gr, rhombos, a rhombus ; eidos. 



317 Ulrichi, James. 



Note. — S.tenuistriata,Sowerhy; S. rugosa, Hisinger; and 

 S. gibbosa, James, are considered synonj^ms of S. 

 rhomboidalis. 



Genus Strep)torhynclius^ King. Gr. streptos, twisted ; rhugchos, beak. 



318 Streptorhynchus piano convexus, Hall. L. planus.^ even ; con- 



vexHs, convex. 



319 planumbonus, Hall. L. jjlamis; umbo, the umbones. 



320 filixtextus. Hall. L.^/?/iim, a thread; textus, ^\o\eB. 



