CINCINNATI GROUP FOSSILS. 19 



Genus Microceras, Hall. 



Range. 



409. M. inornatum, Hall 0—7 



410. M. minutissimum, Ulrich 3 — 5 



Family PLEUROTOMARIID^E. 



Genus Pleurotomaria, DeFrance. 



411. P. ambigua, Hall near 2 



412. P. dryope( ?), Billings. (P. carinata, James). ... ? 



413. P. halli, 8. A. Miller 3—4 



414. P. ohioensis, James — 2 



415. P. subconiea, Hall 3—8 



41G. P. subtilistriata, Hall 1—2 



417. P. tropidophora, Meek near 2 



418. P. calphurnia( ?), Billings near 4 



Genus Murchisonia, D'Archiac. 



419. M. angustata, Hall ? 



420. M. augustina, Billings 3 — 5 



421. M. bellicincta, Hall 3—7 



422. M. decurta, Hall 1—2 



423. M. gracilis, Hall 1—3 



424. M. perangulata, Hall near 1 



425. M. milleri, Hall 1—4 



426. M. multigruma, S.A.Miller 5—8 



427. M. simulatrix, Billings near 8 



428. M. sumnerensis, Safford 3—7 



429. M. uniangulata, Hall. ... near 3% 



Genus Trochonema, Salter. 



430. T. umbilicatum, Hall below 0—8 



Genus Raphistoma, Hall. 



431. R. lenticulare, Conrad — 8 



432. R. planistria, Hall G— 8 



Family SOLARIDJ1. 



Genus Ophileta, Vanuxem. 



433. O. levata( ?), Vanuxem below 



