270 BULLETIN NO. 30, UNITED STATES NATIONAL MUSEUM. 



Page. 



Xi«pto*ofen, Conrad, pL XXV, figs. 1-2 183-184 



i«grum«n, Conrad, 1858 184 



L. ptowMtotwm, Conrad, XXV, figs. 3-4 184-185 



L. appregsum, Conrad, pi. xxv, figs. 6-8 185-186 



Siliqua, Muhlfeld 18« 



8. cretacea, Gabb, pi. xxv, flgs. 9, 10 '. 186-187 



Pholadidce. 



Pholas, Ijiim 187 



P. citAara, Morton, pi. xxv, 14-16 187-188 



P.? lata, n. 8., Whitfield, 1885, pL xxv, fig. 17 189-190 



Martegia, Leach 190 



M. (Pholas) cretacea, Gabb, pi xxv, flgs. 20-23 190 



Teredidce. 



Tw«do, Linn 191 



T. irregularis, Gabb, pL xxv, figs. 18, 19 191-192 



QastroehatnidcB. 



OlavageUa, Lam .' 3 92 



a rtrmato, Morton, pi. xxv, fig. 24 192-193 



Section iv.— Laraellibranchiata from the Middle Marl Beds. 



Ostreidas. 



Oryphcea, Lam 194 



6. vesicularis, Lam., pi. xxvi, figs. 9, 10 194 



G. bryani, var. precedens, n. var., "Whitfield, 1885, pi. xxvi, figs. 7-8 194-195 



Gryphoeosirea, Conrad 195 



^ O. i!ow«r, Morton, pi. xxvi, flgs. 11-12 195-196 



Mytilidce. 



Jfodio^a, Lam 197 



M. ovata, Gabb, pi. xxvi, flgs. 13-14 197 



M. (lAthodomus?) m/afa, n. s., Whitfield, 1885, pL xxvi, flgs. 1-2 197-198 



Pteriidce, Meek. 



. Pinria, Linn 198 



P. rostriformis, Morton, pi. xvi, figs. 3-4 198 



ArddfB. 



Idonearca, (Conrad 199 



I. median*, n.s., Whitfield, 1885, pi. xxvi, figs. 5-6 199 



I. compressirostra, n. s. , Whitfield, 1885, pi. xxvi, flgs. 15-16 199-200 



Isocardiidce. 



Isocardia, Lamarck 200 



I. conradi, Gabb, pi. xxvi, figs. 3-4 200-201 



Teredidce. 



Teredo, Linnaeus 201 



T. «i6iaii«, Morton, pi. xxvi, figs. 19-22 201-203 



Gastroehcenidce. 



Gaslrochcena, Spengl 203 



G. americana, Gabb, pi. xxvi, figs. 17-18 203-204 



Section V. — Lamellibranchiata from the lower layers of the Upper Marl Beds 

 of New Jersey. 



Ostreidae. 



Ostrea, Linnaeus 205 



O. glandiformis, n. s. , Whitfield, 1885, pi. xxvii, figs. 1-5 205-206 



Gryphcea, Sow 206 



O. bryani, Gabb, 1876, pi. xxvii, figs. 6-9 206-207 



Mytilidce. 



Modiola, Lam 207 



M.johnsoni, n. s., Whitfield, 1885, pL xxviii, flgs. 8, 9 207 



Arcidce. 



Area, Linn 208 



A.quindeeemradiata, Gabb, 1860, pi. xxvii, flgs. 10-13 208 



Astartidce. 



Oardita, Brug 209 



O. intermedia, n. s., Whitfield, 1885, pi. xxviii, figs. 14, 15 209 



Orassatella, Lamarck 209 



a conradi, n. s., Whitfield, 1885, pL xxviii, figs. 1-5 209-210 



0. delawarensis, Gabb, pL xxvii, figs- 14,15 210-211 



