Transactions of the American Philosophical Society, Volume 13;Volume 19

Acad angle antennæ anteriorly appear band basal base body broad brown canal canaliculate caudal fin caudal peduncle cephalic segment characters Chilopoda clay coal coincidence color comet coxæ Cretaceous dental lamina depth distal dorsal fin elongate Eningen ether foliis fossil Fucoides genera genus Gervais Hybopsis inches joint Journ labium Lake lamina last pair lateral line lateralibus magnetic mandibles margin median miles modice Mountains mouth Myriapoda narrow nearly Newport North observed obtuse ocelli operculum orbit pair of feet pedibus peristome Philadelphia pieces pilose plants plates portion posterior posteriorly postice Proc procne Prof punctate radials rays River rocks rounded sandstone scales scuta scutis scutum shale short side Silurian slender slightly sparsely species specimens spines sterna subsegment sun's surface sutures teeth thick tubercles upper utrinque ventrals Wood Yoruba zodiacal light