GEOLOGICAL SUMMARY. 



171 



No. 466. Astrocerium pyriformis, Hall. (3 specimens). 



No. 467. Chaetetes lycoperdon, Say. (3 specimens). 



No. 469. Favistella stellata, Hall. 



No. 472. Halysites catenulatus, Linu. 



No. 474. MontiCUlipora Dalei, E. and H. (5 specimens). 



No. 475. Monticulipora mammulata, d'Orb. (3 specimens). 



No. 487. Streptelasma corniculum, Hall. (3 specimens). 



ECHINODERMATA. 



No. 463. Agelacrinus cincinnatiensis, Roemer. 



No. 464. Caryocrinus ornatus, Say. 



No. 465. [936] Lepadocrinus (Apiocystites) Gebhardi. 



No. 443. [911] Crotalocrinus rugosus, Miller. 



No. 446. [932] Ichthyocrinus laevis, Conrad. 



No. 447. [938] Mariacrinus nobilissimus, Hall. 



MOLLUSCA. 



No. 411. Gorgonia antiqua, Hall. 



No. 413. Ptilodictya Shafferi, Meek. 



No. 407. Lingula CUneata, Conrad. (3 specimens). 



No. 408. Lingula (Lingulepis) prima, Con. 



No. 405. Crania scabiosa, Hall. (2 specimens). 



No. 391. Strophomena alternata, Con. (4 specimens). 



No. 393. Strophomena planumbona, Hall. (3 specimens). 



No. 393. Leptaena sericea, Sow. (5 specimens). 



No. 395. Orthis laticostata, James. (6 specimens). 



No. 396. Orthis lynx, Eichwald. 



No. 397. Orthis occidentalis, Hall. (6 specimens). 



No. 398. Orthis plicatella, Hall. (10 specimens). 



No. 399. Orthis SUbquadrata, Hall. (6 specimens). 



No. 400. Orthis testudinaria, Dalman. (10 specimens). 



No. 389. Retzia evax, Hall. (5 specimens). 



No. 376. Zygospira modesta, Say. (25 specimens). 



No. 365. Rhynchonella dentata, Hall. (10 specimens). 



No. 366. Rhynchonella capax, Con. (8 specimens). 



No. 370. Pentamerus oblongus, Sow. 



No. 371. Pentamerus oblongus, Sow. (3 specimens). 



No. 361. Leptocoelia hemispherica, Sow. 



No. 338. Ambonychia radiata, Hall. (2 specimens). 



No. 307. Conularia trentonensis, Hall. 



No. 308. Tentaculites irregularis, Hall. 



No. 301. Maclurea Bigsbyi, Hall. (2 specimens). 



