378 On "'■ \ ■ u.s Ajyilii J i<> P 'ixidium, 



Megerle and Linruvus : " Eine etwas ungcstallte Kammuschel, 



obnc Olnvn von beideD Seiten abgezeichnet. 

 Sic ist urspriinglich axis dor Marne and 

 sehr gemein. Doeli konnte sic wohl aus 

 dem Pluss nicht eigentlich, sondorn aus 

 dem Meer hineingefiihret worden seyrj." 



With these facts* before us it is not pos- 

 sible to suppose that Megerle in describing 



Pi nu proposed establishing a genus similar to Pisidium. 



Deshayesf and II. and A. Adams X both adopt Pisum for 



/' ridium. 



ITIiisculiiim. 



During the years 1806-8, II. F. Link published a series of 

 catalogues of the collections of the University of Rostock, to wit: 



I '■ jchreibung § der Naturalien; Sammlung der Universitat zu Ros- 

 tock, yon I >r. II. F. Link, Rostock. Gedruckl b] Adlers Erben. 



Erete Ahtheilung; zum Weihnachtsfest, d. 25 Dec. 180G (p. 1-48). 



Zweite Al.th. : zum Osterfest, d. 29 Marz 1807 (p. 49-98). 



Dritte Abth.; zum Pfingsfest, d. 17 Mai 1807 (p. 99-165). 



Vierte AJ>tb.; zum Weihnachtsfest, d. 25 Dec. 1807 (p. 1-30). 



Fttnfte Al.th. : zum Osterfest, d. 7 April 1808 (p. 1-38). 



- lute Al.th. : zum Pfingsfest, d. 6 luui L808 (p. i 38). 



I >mparatively few copies of this work were distributed. The 

 greater part seem to have remained in the Btores of the Univer- 

 sity. Oken is the only naturalist who Beema to have had any 

 acquaintance with these publications, until they are mentioned 



. Hei rmannsen. || 



In the third of these catalogues, Maw L 807, page L52, Link 



• l • n my province to determine what d'Argenville's shell actually is— it 



ely my intention t<> Bhow thai it does not belong t<> tl i>- genus Pisidium. 



to venture an opinion, 1 should Bay ii waa a foasil. As for its 



irine living shell, n« is hinted, it ia hardly possible, when vre reflect thai 



Marne dot tP a point more than one hundred miles 



* Bril '•' ictait, 220 1854 



(H.i ad A. A. I.. Gk a. Bee Moll, I! . 660, U 



Pi / Lou . cb 228, I J51 : and the Vol. for 



. IfaJ i'r mord . L846-T. 



