Palceozoic Bicalced Entonwstraca. 53 



Carbouiferotts rocks of Rasdia. 3Io3t of tUesie species had 

 been previously noticed by him, though not figured, in the 

 ' Bulletin Soc. Imp. Nat. Moscou,* ann^e 1857, p. 198. 



M. d'Eichwald's specimens are from the Carboniferous 

 Limestone of B orowitschi, in the Government of Novogorod ; 

 from Carboniferous Limestone on the right bank of the 

 Serena, near Goroditz, in the district of Kozel, in the Govern- 

 ment of Kalonga ; from Carboniferous Limestone on the 

 river Tscherepete, near Tschemischine, in the district of 

 Likhwine, in the Government of Kalonga ; from the Car- 

 boniferous Dolomite of Sterlitamak, in the Gov«Timent of 

 Orenburg ; from the C^Merj'na-Limestone near the village of 

 FiJimonoff, on the river Oupa, in the Government of Toula ; 

 and from the Carboniferous Shale of Slaboda, also in the 

 Government of Toula. 



From these materials D'Eichwald describes and figures the 

 following species : — 



Bevrichia pbberoaa, D'Eichtcald, BalL S. I. X. M<j6c. IS-^r, xxjl iL 

 p. .312: leth. Rose. L v. 1S.59. p. 300. vii laOO, p. I:i49, pi. -52. f. 11. 



Iy?tk Ross. L V. 1850, p. 309, viL 1860, p. 1S47, pL 52. t 10. 



a Kirkhya. 

 strioUta, DEichtcaltL, BulL S. L X. Moac 1«7, xel iL p. -312; 



Iveth. Ra»s. L v. 1859^ pu 300, ¥ii. 186 J, p. LStS, pL 52. £ 14. This is 



a Kirkhya. 

 L^p^rdida microphtludina, U Eichtcald, Cypridina, BalL S. L X. 31asc. 



l'So7, XXX. iL p. 310 ; Leperditioy Letli. Roee. i. riL 1860, p. 1336. 



PosaUy a rarietr of L. Okeni. 

 Baiidia ^foalem, UEuitwald, BvSL S. L X. Mo?c 1857. xxx. iL p. 311 ; 



Letk Roas. L t. 1S59, p. 300, viL 1800, p. 1:539. pL .52. £ 4. 

 laevigata, U Eichwald. Cypridina, BolL S. I. X. Mosc. 1857, xxx. iL 



p. 310 . Letk R0.5S. L v. 1>50, p. .309 ; Bairdia, Leth. Roi&. L viL 1800, 



p. 1342, pL o2. t o : and rar. niffnteens. Both are Ltperditidty and 



]»ol)ahlT Tariedes of L. OienL 

 sqnaHs, D EiektoM, BalL a L X. Mo«. IdoT, xxx. ii p. 311 ; 



Leth. Roee. i. t. 1850, p. 20d, viL 1860, p. 1.340. pL 52. L Q. 

 eicisa, D'Eidtwald,BaJl. S. L X. M.jec. 1857, iri. iL p. 311 ; Leth. 



Ross. L T. 185.9, p. 300, viL 1860, p. 1342, pL 52. £ b. Posdblj Cy- 



tJure Ct ) bilfjbata i 'ii.nneta). 

 distracta. UEickwald, Ball S. L X. Mosc 1857, xxx. iL p. 311 ; 



Leth. Ro<i& L riL 1860, p. 1341, pL 52. £ 12. Veiy amilar to BiardU 



wntcronatay Reois. 

 carta, MKlov, I/Eiekmaid, BnlL S. L X. lAoec 1857, xxx. iL p. 311 : 



Leth. Roas. L r. 1850, pu 309, tiL 1800, pu 1.^38, pL -52. £ 17. and rar. 



£ 18l B. mm if lm, plebeJOj and mieties. 



Judging from M. d'flichwald's pnUished figoree, acme of 

 the above ^Kcies mav be more appropriateir placed in olhex 



