BIBLIOGRAPHY OF PALAEOZOIC CRUSTACEA. 225 



Volborth (A.) Ueber einige russiclie Trilobiteii. 



In Verhandl. riiss. k. niineraL GeselL zu St. Petersbiirg, 1847, p. 1, pL 1. 



The aiithor redescribed the genus Zethus Pander and its type Z(dhu.n 

 verrucosus, placing Cyheh hellatulus Eichw. under the same genns. 



Zethus verrucosus Pand., Z. hellatulus Dalni. 



Volborth on p. 15 signifies the particixlar affinities which exist between 

 Dindymene and Zethus. He expresses the opinion that these two genera 

 are identical. 



Ueber das Prioritatsrecht der Trilobiten-Gat- 



tuiig ZetJtus Pander gegeii die Gattung Cryptonymu^ 

 Eichwald. 



In Bull. Physico-Math. Acad. Sci., St. Petersburg, 1854, p. 251. 



Ueber die Bewegungs-Organe der Trilobiteii. 



Folgendes mit. 



In Verhandl. russ. k. mineral. Gesellsch. zu St. Petersburg, 1857-58, 

 p. 168. 



Ueber die Crotaluren und Remopleuriden, ein 



Beitrag zur Kenntniss der russichen Trilobiten. 



In Verhandl. russ. k. mineral. Gesell. zu St. Petersburg, 1857-58, p. 

 126. pi. l.S. 



Crotalurus n. g., C. harrandel u. sp. Rernopleurkles nanus Leiicht. 



Ueber die mit glatteu Rumpfgliedern verse- 



henen russischeu Trilobiten, nebst einem Anhange iiber 

 die Bewegungsorgane und iiber das Herz derselben. 



In Mem. Acad. Imp. Sci. St. Petersburg, vol. 6, No. 2, 1863, 48 pp., 

 4 pis. 



Panderia n. g. lUamus crasnicaudcc Wahl., 7. dalmanl n. sp., /. tauri- 

 cornis Kut., /. triodontusus n. sp. Dysplanus centrotus Dalm., D. muticus 

 n. sp. Panderia triquetra n. sp., P. minima n. sp. Nileus armadillo 

 Dalm, Bumastus harriensis Murch. 



This article also contains an essay on the organs which were found by 

 Dr. Pander on the i;nder side of the pleura- of Asaphus, which resemble 

 very much the feet of Trilobites. 



There is also a second paper on the heart of the trilobites. The author 

 states that he found on an Illrenus from which the shell had been removed 

 in the region of the axis, on the median line, a small, flat, depressed, 

 tubular organ, horizontal fixiTowed and divided into thirteen chambers. 

 This tube extends from the margin of the pygidium in a curved line to 

 the glabella. The chambers are all of uniform length — 1 i mm. The width 

 enlarges towards the front in such a manner that the first nine chambers 

 from the pygidium are only li mm., whereas the tenth and eleventh 

 15 " 



