SYNOPSIS OF GENERA. 



XXXIX 



Sub-genus CONOLICHAS, Dames. 1877. 



lSr>9. Lichas, Hall. Pal. N. V., vol. iii. 



18(51. Lichas, Hall. Descr. New Species Fossils. 



L862. Lichas, Hall. Fifteenth Rept. N. V. stair Cab. Nat. Hist. 



1869. Lichas?, Kakstens. Beitr. zur Landesk. herzog. Schleswig und li"l ti 



1874. Lichas, Stewhardt. In preus. Gesch. get. Trilob. 



L876. Acidaspis (Terataspis), Hall. Illustrations of Devonian l'"ns.sils. 



I >■ 7 7 . Conolichas, Dames. Zeitsch. der deulsch. gjeol. Gesellsch. 



1885. Conolichas, Schmidt. Revision Ostbalt, Silur. Trilob. 



18S5. Conolichas, Zittel. .Handb d. palaeontologie. 



Diagnosis. Glabella with only anterior and posterior 

 lateral furrows. Lateral lobes well defined. Frontal 

 lobe, and sometimes the lateral lobes, conically elevated, 

 and often inclined backward. 



Sub-genus HOPLOLICHAS, Dames. 1877. 



1S42. AsapJius, Conrad. Jour. Acad. Nat. Sci. Phila. 



1846. Lichas, Beyrich. Untersuchungen iib. Trilob. 



185S. Lichas, Dethlbff and Boll. Trilobiten Mecklenburgs. 



1S59. Lichas, Nieszkowski. Monogr. Trilob. Ostseeprov. 



1867. Metopias, Quenstedt. Petrefaktenkunde. 



1869. Lichas, Kakstens. Beitr. zur Landesk. herzog. Schleswig and Holstein. 



1S74. Lichas, Steinhardt. In preus. Geschieb. get'. Trilob. 



1877. Hoplolichas, Dames. Zeits?uh. der deutsch. geol. Gesell. 



1.885. Hoplolichas, Schmidt. Revision O.stbalt. Silur. Trilob. 



1885. Hoplolichas, Zittel. Handb. d. Palseontologie. 



Diagnosis. The frontal lobe of the glabella 

 longitudinally arched, evenly convex, tubercled, 

 spiniferous or with a single strong baculate pro- 

 cess. Lateral furrows as in Conolichas. Occipital 

 ring bearing a simple or compound spine. 



