378 Raymond — Amphion, Ilarpina, and Platymetopus. 



is exactly similar to that in the European species. If this 

 median indentation does represent the first pair of glabellar 

 furrows, and Amphion canadensis has lost it and the denticu- 

 late glabellar margin as well, then Pliomera Fischeri denotes 

 an earlier stage in the development, and it will probably be 

 best to separate the American forms under the name Plio- 

 merops, with Ampliion canadensis as the type. Amphion 

 convexus Billings and Amphion Westoni Billings appear to 

 belong to this subgenus. In regard to Amphion Barrandei 

 Billings states that a small median pit is present in exfoliated 

 specimens,* indicating the presence of this median furrow in 

 a rudimentary but deep-seated condition. 



The generic term Harpina was first used by Burmeister, in 

 1844, for a species of Coleoptera,f while Bock used it for a 

 crustacean, in 18704 Novak proposed the name a third time, 

 in 1884, for a subgenus of Harpes,% using it to designate the 

 Lower Silurian forms of the genus. The hypostoma differs in 

 the Upper and Lower Silurian species, and it was on this differ- 

 ence that the two genera were separated. The hypostomas of the 

 Chazy forms are not known, but it is probable that they will 

 be found to agree with those of the species from the Ordo- 

 vician investigated by JNovak. In any event, it is necessary to 

 supply a new name in place of the preoccupied Harpina, and 

 Eoharpes is herewith suggested. 



Platymetopus was first used by Dejean, in 1829, for a species 

 of Coleoptera,|| and by Angelin, in 1854, for a subgenus of 

 Lichas.*[ In 1902, Keed** saw that the name was preoccu- 

 pied and suggested Paralichas to take its place. Unfortu- 

 nately this name had been applied by White, in 1859, also for 

 a species of Coleoptera,ff hence it will be necessary to give a 

 new name for species of Division 3 of Schmidt, of which 

 Lichas Imvis Eichwald is the type4t For this purpose, 

 Amphilichas is proposed, and should be applied to the Chazy 

 species now known as Platymetopus minganensis. 



Paleontological Laboratory, Yale University Museum, March 23, 1905. 



* Paleozoic Fossils Canada, pp. 288, 321, 322. 

 fHandbuch der Entomologie. X Overs. Dan. Selsk. 



§ Studien an Hypostomen der bohm. Trilobiten, No. 2, p. 4. 

 || Species general, des Coleopteres. vol. v, p. 815. 

 "ITPalaeontologica Scandinavica, p. 68. 

 ** Quart. Jour. Geol. Soc. London, vol. lviii, pp. 62, 89. 

 ft Ann. Mag. Nat. Hist., ser. 4, vol. iii, p. 284. 



t^Sev. der Ostbalt. Silur. Tril. Mem. Acad. Imp. St. Petersbourg, ser. 7, 

 vol. xxxiii, Nd. 1, p. 49. 



