Miscellaneous. 



239 



opinion which Professor Edward Forbes entertains of this work of 

 M. Barrande was declared in the warmest terras by him in the pro- 

 ceedings of our Section. 



Your very obedient servant, 



Roderick I. Murchison. 

 Essai de Classification des Trilobites. 

 Section I. Conformation de la tete tres-distincte de celle du pygidium. 



Families, !"« Serie. Plevre a sillon. 



V. 

 VI. 



rl8. 



119. 



r2(J. 



121*, 

 VII. 22. 

 [23. 

 VIII. ^ 24. 



I 25. 



r26. 

 IX. \ 27*. 

 I 28*. 



Harpes 



Remopleurides , 

 Paradoxides . . . 

 Hydrocephalus . 



Sao 



Arionellus 



EUipsocephalus 



Olenus 



Peltura 



Triarthrus 



Conocephalites 



Prcetus 



Phillipsia 



Griffithides 



Cyphaspis 



Arethusina 



Harpides 



Phacops , 



Dalmania 



Calymene 



Homalonotus . 



Lichas , 



Trinucleus 



Ampyx 



Dionide 



Asaphus 



Symphysurus... 

 Ogygia 



Axe tronqiti. 

 X. 29. ^glina 



Gold/. 



Portl. 



Brong. 



Barr. 



Barr. 



Barr. 



Zenk. 



Dalm. 



M.Edw. 



Green. 



Zenk. 



Stein. 



Portl. 



Portl. 



Burm. 



Barr. 



Beyr. 



Emmr. 



Emmr. 



Brong. 



Kon. 



Dalm. 



Lhwyd. 



Dalm. 



Barr. 



Brong. 



Gold/. 



Brong. 



Barr. 



XI 



■{ 



Groupe de passage. 



30. Illaenus Dalm. 



31*. Niteus Dalm. 



Families. 2™« Serie. Plevre a bourrelet. 

 " XII. 32. Acidaspis Murch. 



.3 3 



33. Cheirurus Beyr. 



34. Placoparia Cord. 



XIII.-^ 35. Sphaerexochus . Beyr. 



I 36. Staurocephalus Barr. 



(_37. Deiphon Barr. 



XIV /^^*- Zethus Pand. 



■ \39. Dindymene ... Cord. 



{40*. Amphion Pand. 

 41*. Encrinurus ... Emmr. 

 42. Cromus Barr. 



is 



§ i 



s.s 



'2 ® 



. Axe tronque. 

 XVI. 43. Bronteus Goldf. 



L 



44. Telephus ... Barr. (plevre inconnue). 



Section II. Conformation de la tete peu distincte de celle du pygidium. 



XVII. 45. Agnostus Brong ? 



N*". les genres qui manquent en B. 



