FOSSILS AND PEDIGREES 



345 



posterior to these are believed to represent the pectoral fins. 

 Anything less like a Lamprey it is scarcely possible to imagine, 

 but a closer study of these Anaspids reveals several striking 



Fig. 123. — RESTORATIONS OF SILURIAN AND DEVONIAN MARSIPOBR^\NCHS. 



A. Rhyncholepis parvuluSyA i^. (After Kiaer) ; b. Upper view of Drcponaspis 

 gemundenensis,x^. (Modified from Traquair) ; c. Upper view of Ccphalaspis 

 lyelli, X ^. (After Traquair.) 



points of resemblance. In both there is a pineal organ between 

 the eyes and a single unpaired nostril in front of it (Fig. 124). 

 Unfortunately, the form of the mouth cannot be determined 

 in the fossils, and it seems probable that the terminal portion 

 of the snout was soft, and therefore was not preser\ed. The tail 



