Historical Account of Testaceological Writers. 191 



is proved to have been very rich, by the catalogue of the sale 

 lately published : of the number of the multivalves contained in 

 it, we may judge from his remarks on that division published in 

 the Nova Act. Acad. Nat. Cur. wherein he speaks of being pos- 

 sessed of no fewer than thirty different species of Chiton. 



SCHROTER 



may be considered as one of the most indefatigable Testaceolo- 

 gists of later times. His treatises on land and river shells, and 

 his introduction to the Linnean system of conchology, have laid 

 his countrymen under great obligations to him, and have contri- 

 buted in a very conspicuous degree to the general extension of 

 the science. We shall proceed to specify the titles and time of 

 publication of these highly useful works ; after which we would, 

 with a due tribute of praise to the author, detail such of his 

 labours as are of less account, were they not too numerous to 

 be noticed in a paper of this kind, and were not most of them 

 scattered in a variety of German publications, to which re- 

 course cannot very generally be had in this country. The 

 " Versuch einer systematuchen Abhandlung uber die Erdkonchylien 

 urn Thangchtadt" is illustrated by two copper-plates, containing 

 figures of the land shells found chiefly in the neighbourhood of 

 Thangelstadt. The next work was an account of the river shells 

 of Thuringia. This excellent treatise contains eleven very cor- 

 rect engravings, which, however, are rather too highly coloured. 

 There are long descriptions in it, with good specific characters, 

 formed on the Linnean method. A third treatise came forth at 

 Frankfort in 1783, under the title of " Veber den innerii Bau der 

 See mid e'u/ger ausldndischen Erd and Fluss Schnecken," with five 

 plates. In the same year with the last-mentioned work this writer 

 published his general conchology in three thick octavo volumes, 



illustrated 



