248 



TRILOBITA 



connected with the other suture by means of a transverse suture 



Fio. 150.— A, Harpes ungula, Sternb., Ordovician. B, Ellipsocephalus hoffi, Scloth., 

 CamLrian. C, Olenus truncatus, Bvimu., Qarnhviaxx. (After Angelin.) B, Remo- 

 pleurides radians, Bair., Ordovician. E, Conocoryjjhe sidzeri, Barr., Cambrian. 

 F, Illaenus dahnanni, Volb., Ordovician. G, Proetus hohemicus, C'orda, Silurian', 

 X li. H, Aeglina prisca, Barr., Ordovician, x 3. I, Phacops sternbergi, Barr ' 

 Devonian. (A, D, E, G, H, I, alter Barrande ; B, F, from Zittel ; natural size 

 except G, H.) 



(Fig. 137, B, D). The eyes are rather small. The thorax con- 



