248 TRILOBITA CHAP. 
connected with the other suture by means of a transverse suture 
Fic, 150.—A, Harpes ungula, Sternb., Ordovician. B, Ellipsocephalus hoff, Scloth., 
Cambrian. ©, Olenus truncatus, Briinn., Cambrian. (After Angelin.) D, Remo- 
pleurides radians, Barr., Ordovician. E, Conocoryphe sulzeri, Barr., Cambrian. 
F, Zlaenus dalmanni, Volb., Ordovician. G, Proétus bohemicus, Corda, Silurian, 
x 14. H, Aeglina prisca, Barr., Ordovician, x 8. I, Phacops sternbergi, Barr., 
Devonian. (A, D, E, G, H, I, after Barrande; B, F, from Zittel ; natural size 
except G, H.) 
(Fig. 137, B, D). The eyes are rather small. The thorax con- 
