43 



horizontalibiis , in medio genudeflexis , suloo a tergo ad 

 apicem rotundatum membranaceo-expansum currente. 



Abdomen capite brevius, semicirculare, costatum, 

 rhachide articulata, 



Hoc genus a Calymenarum genere satis distinctum 

 est deficiente contractilitate corporis, oculis numeroque 

 articulorum thoracis. Hucusque tantum in Bohemiae stra- 

 tis argillosis repertum. 



1. C. Sulzeri Schloth. 



C. protuberantia frontali truncato-conica ^ crista trans- 

 versali in hypostomate (inter protuberantiae apicem et 

 marginem), tuberculis oculiformibus pone cristam. 



Trilobites Sulzeri Schloth. Petrefaktenk. Nachtr. 1 1 



pg. 28. tb. xxn. I, 



Concephalus costatus Zenk. Beitrage zur Natur- 

 geschichte der Urwelt pg. 49. t. V. G — K (tho- 

 rax et abdomen minus correcte adumbrata at- 

 que descripta.) 

 Bohemia (Ginec). 



2. C. striatus nova sp. 



C. protuberantia frontali oblonga, antice rotundata, 

 utrinque 3— lobata, oculis a protuberantia remotis in me- 

 dia gena sitis, crista angustissima ab oculo ad protube- 

 rantiae frontalis apicem progrediente. 



Trilobites Sulzeri /?. y, Sternberg Tab. H. l. A. 



(bohm. Museum 1825). 



Trilobites n. sp. Quenstedt in catalogo Petrefact. 



Mus. Min. Berol. Cum antecedente in Bohemia. 



Species antecedenti simillima, diflFert: 

 i*'. deficiente crista ante oculos transversali, quorum 

 loco plaiuun excavatum adest. 



