DESCRIPTIONS OF (JENEIIA AND SPECIES. 



Linn6. 



Myriapoda from the Tertiarv rocks :nv ;ilni..st unknown, :i single species 

 a little larger than ours having been figured by 1'iertkau from Kott under 

 the name of lulus antiquus Heyden. Oilier species have been indicated. 



Serros, for instance, speaks .,f one found near Montpellier, allied to tlie living 

 I. salinlosns, and this mention has been quoted l.y Meyer, Kefcrstein, and 

 Geinit/. Hope al>o catalogues one from Aix.and ( 'otta mentions one, per- 

 haps 1. tei-resiris, from Tharand, Saxony, which is probably ;i recent 

 inclosnre, and is quoted hv Hrulle and I'.erendt. Besides these diplopods 



I [ope catalo-iu- a Scolopendra from Ai\, and Keferstein, on the authority of 



Aldmvandi, mentions a Scolopendra from (ilarus, in Switzerland. 



The Baltic amber, however, contains a considerable number of species, 

 twenty diplopods having been recorded and most of them described, belong- 

 ing to the genera ( Yaspedosoma (seven species), I'olyxenns (live species), 

 lulus (four species), and Kit/onus, Lophonotus, Hlaniulns, and 1'olydesmiis 

 (one species each i. The chilopods have- ;i less number of species, fifteen, 

 representing the genera Lithobius (ei-ht species), Geophilus (three species), 

 and (Vnnatia and Scolopendra (two species each). All these genera 

 excepting Euzonns are representeil among living forms. 



The single species found in America belongs to the diplopods. (No- 

 vember, 1881.) 



Order DIPLOP'OD^ Gervais. 







Family ILJLID^: Leach. 



As in the case of the Rott species described by Bertkau, the form 

 described below is only referred to the genus lulus in a broad sense, its 

 preservation being very defective. It is smaller than the European species. 



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