COXCHOLOG1CAL AUTHORS. XIX 



islands is now very properly placed in the British Museum : 

 and we may venture to predict, that a fine paper copy of 

 his work, with the plates colored, will in no long lapse of 

 time bear a great price. 



Pennant. British Zoology, by Thomas Pennant, Esq. 

 4 vols. octavo, with plates, 1812. 



A new edition by his son. The fourth volume contains 

 the Testacea, with fifty-nine plates of shells, and specific 

 descriptions of each species, interspersed with those stores 

 of erudition with which the venerable and respectable au- 

 thor occasionally enriched the subjects of his contempla- 

 tion. Pennant was the first who reduced the British 

 Conchology to the Linncan classification, and reformed the 

 language : and it is an anecdote not generally known, but 

 justly deserving of record, that the original edition of this 

 work, in folio, was undertaken and completed at his sole 

 expense, for the benevolent purpose of assisting the Welsh 

 Charitable Institution in London. 



Walker. Testacea minuta rariora. By G. Walker. Quarto; 

 with three plates, 1787- 



We are first indebted to the researches of this author, 

 assisted by Mr. Boys, for an inquiry into the diminutive but 

 singularly elegant and beautiful species of shells, which 

 had been before considered either as unimportant, or be- 

 neath the trouble of collection and arrangement. In his 

 work are figured eighty-seven microscopic subjects, with 

 short descriptions. His eighty-eighth and eighty-ninth 

 figures represent two new species of Echinus, which we 

 have collected both on the English and Irish coasts. Mr. 

 Pennant the younger, at p. 140. pi. 38. f. 1, 2, 3. of his 

 fourth volume, has described and figured the former of 

 these, under the name of Echinus Pulvinulus, as a new 

 discovery, not aware of Walker's previous claim. But the 

 scattered fragments of general science it is not always easy 

 to gather together. The excellent Montagu could have no 

 remote suspicion, that the Fasciola Trachea, or poultry- 

 worm, described by him in the Transactions of the Werne- 

 rian Society, had been known to us for nearly twenty years, 

 and is described and figured in the Gentleman's Magazine. 

 It might not have been known to Curtis, that the natural 

 history of the Aphis and the honey-dew was the discovery 

 c2 of 



