EXPLANATION OF PLATES. 
FIGURE. 
68. Xiphoteuthis elongata, Beche. Lias, England, : 
69. Conoteuthis Dupinianus,d’Orb. Neocomian, France, . 
70. Belemnitella mucronata, Sowb. Cret., t 
Tl. Trachyteuthis hastiformis, Ruppell. Jurassic, Europe, 
72. Belemnites excentricus, Keferstein. Oolite, England. 
73. Clinoceras dens, Mascke. L. Silur., Prussia, 
74. Acanthoteuthis ansaune, Cunnington. Oxford Clay, 
England, 
T5-TT. Scaptorrhynchus miocenicus, Bellardi. Tert., ‘Piea- 
mont, . , : ° : < ° : F 
PLATE 29. 
78. Orthoceras (Actinoceras ) aera Stokes. Pal., 
L. Winnepeg, ; ; : ; ° 
79. Orthoceras subannulare, ace Sil,, Bohemia, 
80. Beloptera belemnitoides, Bl. Eocene, France, 
81. Spirulirostra Bellardii, vOrb, Tertiary, Turin, , 
82, 83. Tisoa siphonalis, Marcel de Serres, Jurassic, 
France, 5 ’ , : 
84. Orthoceras (Ormoceras) ‘Bayfieldi, " Stokes. Paleozoic, 
Am. : ; . : 
85. Orthoceras (Huronia) vertebralis, Stokes. L. Silurian, 
Lake Huron, . 
86. Belemnosis plicata, Edwards. Eocene, England, , 
87. Heliceras Fuegiensis, Dana. Cape Horn, 
88, 89. Neumayria fulgens, Trautsch, : : ; : 
90. Strombolituites Torelli, Remelé. L. Silur., Germany, 
91, 92. Xenodiscus plicatus, Waagen. Carbon., India, 
PLaTE 30. 
93. Tretoceras bisiphonatum, Salter. Silur., England, 
94, 95. Gonioceras anceps, Hall. L. Silur., U.S, . 
96. Colpoceras virgatum, Hall. L. Silur., New York, 
97. Piloceras (after Salter). Ideal section, 
98. Cyrtoceras acuticostatum, Sandb., 
99. Oncoceras constrictum, Hall. Sil. , New Y ork, 
100. Gomphoceras pyriforme, Murchison. Silur. , England, 
1. Gomphoceras Bohemicum, Barr. Silur., Bohemia, 
2. Sycoceras orthogaster, Sandb., 3 
3. Ascoceras Bohemicum, Barr. ’ Silur., Bohemia, 
4. Phragmoceras ventricosum, Murchison. Silurian, 
England, , ; 
5. Nothoceras Bohemicum, Barr. U. Silur., Bohemia, 
PLATE 31. 
. Phragmoceras callistoma, Barr. Silur., Bohemia, 
. Gyroceras Goldfussii, d’Arch. Devonian, LHifel, 
aS 
