Historical Account of Testaceological Writers. I91 



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

 latel}'^ 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. Car. wherein he speaks of being pos- 

 sessed of no fewer than thirty different species o^ 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 Avould, 

 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 Avere 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 systematischen AhhandUmg uber die Erdkoncht/lien 

 iim Thangelstadt" is illustrated by two copper-plates, containino- 

 figures of the land shells found chiefly in the neighbourhood of 

 Thangelstadt. Tlie next w^ork was an account of the river shells 

 of Thuringia. This excellent treatise contains eleven ver}'- cor- 

 rect engravings, Avhich, 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 " Ueber den innern Bau der 

 See mid einiger ausidndischen Erd und Flass 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 



