Rev. L. Guilding's Observations on the CMtonidce. 25 



Ohe! jam satis! His arguments and his mode of using them are, I will 

 admit, of such an extraordinary nature, as fully to entitle him to come not 

 only to the two extreme conclusions, but also to five hundred intermediate 

 ones. Still, as it is rather puzzling to guess Mr. Clark's real decision, I 

 ti ust the Council of the Linnean Society will either allow him to append 

 a supplement, stating which of the two opposite conclusions is his final 

 opinion, or that they will have the condescension to state, for the good of 

 the Society at large, what they conceived to be his real sentiments when 

 they ordered the paper to be printed. I repeat that the paper is so truly 

 original in natural history, classical lore, style, and orthography, that I 

 find it impossible to answer it. I may humbly venture to deny, however, 

 the accuracy of Mr. Clark's assertion, that I ever expressed or even enter- 

 tained a wish to change the name of the genus CEstrus. 



I would here ask a question, most important to the future interests of 

 the Linnean Society. Is it not advisable for the Council to alter their 

 present plan, and to insist upon the person to whom a paper is referred, 

 making a written report upon the manner in which any opinion is 

 supported ? Similar reports are made on all papers given in to the French 

 Institute. The critic's personal reputation being then at stake, the 

 Council at large might be sure that no paper would be unjustly condemned 

 or stupidly lauded. 



Ever, my dear Vigors, 



most truly your's 



W. S. MacLeay. 



Art. VII. Observations on the Chitonidce. By the Rev. 

 Lansoown GuiLDiNG, B.J., F.L.S,, M.G. 8^ ff'.S., ^c. 



Tribus. Polyplakiphora, Blainv.* 

 Fam. Chitonidce, Gray, Guilding. 



Animalia cceca, hermaphrodita ? plantivora ? 



Corpus ovato-elongatum ; apicibus sequalibus, rotundatis : disci ver- 

 tice nunc longitudinaliter subcarinato, nunc rotundato-subdepresso. 



♦ Locum melius demonstravit Cuvierius. 



