PALEONTOLOGICAL INDEX 



Figures in italics indicate principal discussion. 



Abra, cxxx, cliii ; 296. 



asquata, 333. 



carinata, 294. 



holmesii, 294. 



longicallus, cviii, cxxx ; 296. 



marylandica, cviii ; 296. 



ovalis, 29.1. 



subovata, 295. 

 Acantharia, ^52. 

 Acanthobatis, 72. 

 Acanthometra, Ji52. 

 Acanthosphsera, i58. 



parvula, cxviii ; i58. 

 Acipenser, 72. 



ornatus, 92. 

 Actseon, cxxiv ; ISl. 



avoides, 131. 



calvertensls, xcviii ; ISS. 



melanoides, 220. 



ovoidea, Ixxxv, xci, xcviii ; 131. 



ovoides, 131. 



punctostriatus. 132, 133. 



pusillus, xcviii, cxxiv ; 132. 



semistriatus, 133. 



shilohensis, xcviii, cxxiv ; 132. 



simplex. 218. 

 Actaeonidse, 131. 

 Acteon melanoides. 220. 



ovoides, Ixxxv ; 131. 

 Actiniae, ^38. 



Actinobolus granulata, 344. 

 Actinocyclus, 502. 



ebrenbergli, 502, 503. 



elllpticus, cxx ; 502. 



faclsculatus, 502. 



marylandicus, .502. 



moniliformis, cxx ; 502. 



partitus, 503. 



sp., 499. 



undulatus, 499. 

 Actinopterygli, 92. 

 Actinoptychese, ^99. 

 Actinoptycbus, 499. 



hellopelta. cxx ; J,99, 500. 



praetor, 499. 



splendens, 499. 



undulatus, cxx ; 499. 



vulgaris var. virginiae, 500. 

 Acus, 139. 



unllineata, 138. 



Adaena, cliii. 

 Adeonellopsis, 417, 418. 



umbllicata, cxvi ; 417. 

 Adeorbidae, 243. 

 Adeorbls, cxxvlil ; 243. 



supranitidus, cvl, cxxviil ; 243 

 Adesmacea, 274. 

 Admete, 165. 

 Aetobatis, 76. 



arcuatus, xcvi ; 76. 



profundus, 76. 

 Agabelus, 9. 

 Agorophlus, 34, 35. 



pygmaeus, 38. 

 Agriopoma, cliii ; S12. 

 Alcidae, 01. 

 Alga;, .487. 

 AligenS, 333. 



sequata, cxii, cxxxii ; 333. 



sequata var. nuda, cxii ; SSS. 



pustulosa, cxii, cxxxii ; 334. 



striata, 333. 

 Alligator lucius, 69, 70. 

 Aloldis, 280. 

 Amalthea, cxxvlii ; 251. 



marylandica, cvl ; 251. 

 Amaltheidsfi, 251. 

 Ampbiblestrum, 4IS. 



agellus, cxvi ; 414. 



constricta, 414. 



constrictum, cxvi ; 413. 



flemingi, 414. 



trlfolium, 414. 

 Amphlceras iota, 134. 

 Amphldesma aequata, 333. 



carinata, 294. 



subovata, 295. 



subreflexa, 298. 

 Amphidetus, cli. 



orthonotus, 431, 432. 



virglnianus, 430, 431. 

 Amphineura, cviii, cxxviil ; 1, 270. 

 Amphisteglna, clii. 

 Amphitetras altenans, 493. 

 Amusium, cxxxlv ; 372. 



mortonl, 373. 

 Amycla communis, 199. 

 Anacardiaceas, 4S5. 

 Anadara, 385. 



incile, 390. 



