206 FOSSIL SQUALIDiE OF THE UNITED STATES. 



Genus OTODUS, Agassiz. 



Sp. 1. O. OBLIQUUS, Agass. PI. xxvi. figs. 131 to 137. 



2. 0. APPENDicuLATUs, Agass. PI. xxvi. figs. 138 to 140. 



3. O. LEVIS, Gibbes. PI. xxvi. figs. 141. 



4. O. cRASsus, Agass. PI. xxvi. fig. 142. 



5. O. MACROTUSj Agass. PI. xxvi. figs. 143, 144. 



6. O. TRiGONATUS, Agass. PI. xxvi. figs. 145, 146. 



7. O. APicuLATUs, Agass. PI. xxvi. fig. 147. 



Genus OXYRHINA, Agassiz. 



Sp. 1. O. HASTALis, Agass. PL xxvi. figs. 148 to 152. 



2. O. xiPHODON, Agass. PI. xxvi. figs. 153, 154. 



3. O. FLicATiLis, Agass. PI. xxvi. figs. 155 to 157. 



4. O. MANTELLi, Agass. PI. xxvi. figs. 158. 



5. O. CRASSA, Agass. PI. xxvi. figs. 159, 160. 



6. O. MiNUTA, Agass. PI. xxvi. figs. 160 to 164. 



7. O. siLLiMANi, Gibbes. PI. xxvi. figs. 165 to 168. 



8. O. DESORii, Gibbes. PI. xxvi. figs. 169 to 171. 



9. 0. v?iLSONii, Gibbes. PI. xxvi. figs. 171 to 173. 



This monograph will be continued from time to time as specimens are procured. 



