198 Dr. M axon's and Mr. Rackett's 



work, however, did not comprehend any of the Vermes, and it 

 was not until the year 1778 that a 4th volume made its appear- 

 ance, with descriptions and figures of that tribe. This volume 

 contains an enumeration of l63 species of Testacea, with concise 

 descriptions, and o6 plates exhibiting about 200 figures of them. 

 Most of these plates are valuable for reference, but some of them 

 are executed less carefully than could have been wished. In the 

 descriptive part the author has translated pretty closely the spe- 

 cific characters given by Linnaeus, whenever they could be had ; 

 but there are several species of which the former is to be looked 

 upon as the first describer. It is very remarkable, however, that 

 he should have wholly omitted others which had been noticed by 

 Lister and Petiver, and which are unquestionably natives of our 

 island. 



In the Nova Act. Reg. Soc. Scient. Upsal. we find a description 

 oi Anomia Caput Serpentis by this author, with a figure subjoined. 

 It may be remarked that the same shell is described in the same 

 volume by the pen of Linnauis, whose figure (with those oi Ano- 

 mia pafellaformis, noticed in the same paper,) occurs in the plate 

 that contains Pennant's. 



We have next to mention the Introductio ad Historiam Natu- 

 ralem, and the Delicice Faunce et Flora Insubrkce, of the learned 



SCOPOLI, 

 both of which are the productions of great science, aided by ge- 

 nuine ardour of investigation. Scopoli was Avell acquainted with 

 the labours of his predecessors in Testaceology, as well as in other 

 Ijranches of natural history, and has availed himself of them to- 

 wards perfecting the system of Linnaus, whose genera he has 

 considerably augmented, — more so, perhaps, than is consistent 

 with the general simplicity and facility of application of the ori- 

 ginal. 



