248 



TRILOBITA 



CHAP. 



connected with the other suture by means of a transverse suture 



FIG. 150. A, 11,, ,;,<* K.vjuhi, Sterub., Ordovician. B, Ellipsocephalus hoffi, Scloth., 

 Cambrian. C, Oknus tmnmtus, Briinn., Cambrian. (After Antcelin.) D, Remo- 

 pleurides radians, Barr., Ordovician. E, (.'onocoryphe sulzeri, Barr., Cambrian. 

 F, Illafiuts ifii/imi/tiii, Volb., Ordovician. G, Proetus bohemicus, Corda, Silurian, 



< H. H, AeyliiM prisca, Barr., Ordovician, x 3. I, Phacops sternbergi, Ban- 

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

 c.\ct-}>t G, H.) 



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



