The Genus Cryptonymus, Eicliwald, 1840. 



HISTORICAL NOTICE. 



In the ye<ar 1711, Herrmaun published, in his Mas- 

 lographia, the following description : " Pectunculites 

 marmoreus trilohus imbricatus in medio dorsi punctatus, 

 et striis exiguis per transversuni notadis," and figures 

 (plates 9 and 11, fig. 50) the pygidiura of Cryptonymus 

 pimctatus. He represents a specimen with 6 tubercles 

 on the axis, and 9 pleurae. These figures are the first 

 that we possess of this trilobite. 



In 1759, Linnaeus figures (table 1, fig. 2) the pygi- 

 dium of C. imnctatus under the common designation 

 for all the genera, "Ento/riolithus paradoxus." These 

 figures {^pjiear in his pamphlet, Petrificatet Entomol., 

 etc., copied in the Act. Reg. Acad. Scient. Holmiens, 

 pages22-24,pl. l,fig. 2. 



In 1703, Lehmaun, in the Nov. Comm. Acad. Scient. 

 Imper., vol. x., (table 12, fig. 10) represents a pygidium 

 of the C. punctatus. 



In 1768, C. F. Wilckeus, in Stralsundishes Maga- 

 zin, vol. iv, p. 207 (table 3, fig. 12) figures a pygidium. 



Joh. Beckraan, in De Reductione Rerum Fossilium, 

 etc., published in the Nov. Comment, Soc. Reg. Scient. 

 Gcetting, vol. 3, 1773, p. 102, describes a pygidium. 



In 1781, M. T. Brunnich, in Nye. Samliug af det 

 Kong. Danske "Videnski Skrifter. Kiobenk., vol. i, p. 



