BIBLIOGRAPHY OF PALAEOZOIC CRUSTACEA. 225 



Volborth (A.) Ueber einige russiche Trilobiten. 



In Verhandl. russ. k. mineral. Gesell. zu St. Petersburg, 1847, p. 1, pi. 1. 



The author redescribed the genus Zethus Pander and its type Zethus 

 < rrurosus, placing Cybele bellatulus Eichw. under the same genus. 



Zethus verrucosns Pand., Z. bellatulus Dalm. 



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

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

 are identical. 



- Ueber das Prioritatsrecht der Trilobiten-Gat- 

 tung Zethus Pander gegeii die Gattung Cryptonymus 

 Eichwald. 



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



Ueber die Bewegungs-Organe der Trilobiten. 



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. 13. 

 Crotahtrus n. g., C. barrandei n. sp. Remopleurides nanus Leucht. 



Ueber die mit glatten Kumpfgliedern verse- 



heneii russischen 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. Illanus crassicauda Wahl., /. dalmani n. sp., /. tauri- 

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

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

 Dalm. Bumastus barriensis Murch. 



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

 Dr. Pander on the under side of the pleurae 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 Illcenus from which the shell had been removed 

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

 tubular organ, horizontal furrowed 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 \ mm. The width 

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

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

 15 



