INDEX. 
557 
Leptodesma flaccidum, Hall, 
L. Hector, Hall, . 
L. Jason, Hall, 
L. lepidum, Hall, . 
H. (Lesleyi, Hall, 
L. Lidias, Hall, 
L. longispinum, Hall, 
L. Loxias, Hall, . 
Xi. Lysander, Hall, . 
L. Maclurii, Hall,. 
!L. Marcellense, Hall, 
L. Matheri, Hall, . 
L. Medon, Hall, 
L. Mentor, Hall, . 
L. Mortoni, Hall, 
L. mytiliforme, Hall, 
L. naviforme, Hall, . 
L. Nereus, Hall, . 
L. Orcus, Hall, 
L. Orodes, Hall, . 
L. Orus, Hall, . 
L. patulum, Hall, . 
L. Pelops, Hall, 
L. Pliaon, Hall, . 
L. potens, Hall, 
L. potens, var. juvens, Hall, 
L. propinquum, Hall, 
L. protextum, ( Conrad) Hall, 
L. quadratum, Hall 
L. robustum, Hall, . 
L. Rogersi, Hall, 
L. rude, Hall, 
L. Shumardi, Hall, 
L. sociale, Hall, . 
I, . spinigerum , (Conrad) Hall, 
L. Stephani, Hall, 
L. truncatum, Hall, . 
L. umbonatum, Hall, 
L. umbonatum, var. depressum 
Lima glaber, Hall, 
L. macroptera, Conrad, 
L. 1 obsoleta, Hall, . 
L. rugcestriata, Hall, . 
Ltmoptera, Hall, 
L. can cell ata, Hall, . 
L. cancellala, var. occidens, H. &. W., 
L. curvata, Hall, 
L. macroptera, ( Conrad) Hall, 
L. obsoleta, Hall, 
L. pauperata, Hall, 
PAGE. 
225, 227 
196, 209 , 213 
213 
. 195, 197 
223 
204, 230, 23 2, 234 
179, 181, 182, 184, 191, 192 
. 204 
. 215, 21G, 218 
207, 223, 228 
175 
. 193, 194 
197 
. 205, 236 
. 182, 189, 190 
. 235 
200 
. 217 
•215, 218 
. ' 206, 214, 223, 235 
219 
. 226 
. 2 14, 220, 225 
. 230, 234 
188,190, 193, 198, 199 
. 189 
231 
. 183, 496 
233 
181, 185,189,191,193,198, 199 
176, 178, 179, 187 
. 221 
180, 191 
. 187 
.'177,183, 184 
. 194 
211 
. 198 
Hall, 199, 200, 202, 
. lix, 
246, 
lix, 
203 
85 
251 
84 
15 
xiii) 243 
244 
. 244 
251 
250 
250, 
244, 246, 
Lucina, 
L. lineata, Goldfuss, . ... . 
Ij. proavia, Goldfuss ...... 
L. ( Paracyclas) elliptica, var Occidentalis. Hall & 
Whitfield, . 440, 
L. (P. ) lirata, (Conrad) Hall & Whitfield, . 
L. ( P. ) Ohioensis, Meek, . 
Lunulicardium, Munster, . xvii, xxxvi, xxxviii, 
243 , 249 
. 243 
xxxix 
. 442 
440 
L acutirostrum. Hall, 
L. curtum, Hall, . 
L. fragile, Hall, 
L. Marcellense, ( Vanuxem) Hall, 
L. orbiculare, Hall, . 
71 
441 
441 
442 
434 
437 
xxxviii, 436, 437 
. xxxviii, 434 
. 435 
436, 438 
Lunulicardium ornatum ? Hall, 
L. ornatum, Hall, 
Ij. rude, Hall, 
Ij. transversum, Hall, 
Lyriopecten, Hall, . 
L. anomiseformis, Hall, 
Tj. cymbalon, Hall, 
L. Ilardanus, Hall, 
I,. fasciatus, Hall, 
L. interradiatus, Hall, 
Ij. macrodontus, Hall, 
L. magnificus, Hall, . 
L. orbiculatus, Hall, 
Tj. parallelodontus, Hall, 
L. Polydorus, Hall, 
L. Priamus, Hall, 
L. solox, Hall, 
L. tricostatus, ( Vanuxem) Hall, 
Mac.rodon, Lycett, 
M. Chemungensis, Hall, 
M. Hamiltonia;, Hall, 
M. ovatus, Hall, . 
M. parvus, White </• Whitfield, 
Margaron, 
Megambonia, Hall, 
M. bellistriata, 
M. cardiiformis, Hall, 
M.? lamellosa, 
M. Lyoni, Hall, 
M. subcardiiformis, (Hall) S. A 
Meristina, Hall, . 
Microdon, Conrad, 
M. 
M.l 
M. 
M. 
M. 
M. 
M. 
M. 
M. 
M. 
M. 
M. 
M. 
M. 
M. 
PAGE. 
. 436 
436, 437 
. 435, 437 
. xxxviii, 439 
(xli) 2, 40, 74 
53 
45, 47, 
44, 
43, 45, 46, 48, 50, 52, 55, 
45, 47, 48, 50, 51, 
41,42, 
40, 
45, 50, 
43, 50, 54, 
. 45, 51, 
47, 48, 
. xxviii, 349, 
50 
41 
55 
50 
57 
57 
81 
42 
57 
56 
56 
51 
407 
xxviii, 350 
Miller, 
bellistriatus, 
complanatus, Hall, 
complanatus, 
gregarius, 
reservatus, Hall, . 
tenuistriatus, . 
(Cypricardella) bellistriatus, Hall, 
xxviii, 349, 
Iv, 
lv, 
Iv, 
xxv, 307, 
310, 
310, 312, 
(C. ) complanatus, Hall, 
(C. ) gregarius, Hall, 
(C. ) major, Hall, 
(C. ) tenuistriatus, Hall, . xxv, 
( Microdonella) ( Eodon ) bellistriatus. ( Con r.) Hal 1, 
( M. ) ( E. ) complanatus. Hall, . 
IM. ) (E. ) gregarius, Hall, . 
( M'. ) (E. ) tenuistriatus, Hall, . 
Microdonella, OShlert, .... xxv, 
M. bellistriata, (Conrad) CEhlert, . xxv, 
M. complanata, ...... 
M. gregaria, Hall, ..... 
M. tenuistriata, Hall, ..... 
Modiella, Hall, ..... liv, 
M. pygma;a, ( Conrad ) Hall, . . liv, lv, 514 
Modiola, Lamarck, . . (xiv) lv, 175, 236, 267, 514 
M. angnsla, Dana, ..... 516 
M. concentrica, [Conrad) Hall, . . 275 
M. metella. Hall, . . . .. . . 266 
M. prcecedens. Hall, .... 267, 268 
M. (Mytilops) metella, Hall, .... 268 
M. (M. ) praecedens. Hall, . 267 
Modiolopsis perovata, Meek <f Worthen, . . 273 
MODIOMORPIIA, Hall, xxiii, xxiv, 1,175, 234, 269, 272, 293, 352 
351 
351 
351 
lvi 
515 
515 
515 
lv 
433 
515 
28 
312 
311 
311 
309 
309 
312 
313 
308 
311 
309 
307 
310 
308 
311 
309 
310 
307 
308 
307 
309 
310 
514 
