Genus Latinis, 389 



:genus. He makes Richiula pulchra (Reeve), or Peristernia 

 J>idchra of some authors a variety of P. incarnata (Desh.), 

 one of the most extraordinary conclusions that has ever 

 been drawn by any writer, and also describes Peristernia 

 Carolines (Kien) twice, once under Peristernia^ and again 

 under Engina (Gray), where I agree it had better find a 

 location. 



Peristernia chlorostoma (Sowb.). Mr. Edgar Smith has 

 given me the benefit of his valuable opinion as to this 

 perplexing species and its allies ; marking out four species 

 {vide Catalogue), all of which have been unhesitatingly 

 swamped by Mr. Tryon under this name. 



I think P, Caledonica (Petit) and infracincta (Kobelt), 

 also Marquesana (A. Ad.) distinct. They, again, are all 

 grouped as synomyms of P. ustulata (Reeve) in the Manual. 



I am almost inclined to agree with Tryon that P, 

 nassoides (Reeve) may turn out a Nassaria. 



The columellar plaits are absent, and the * facies ' of the 

 shell is more like that genus. P. pulchella (Reeve) is, 

 however, nearly allied, and as that is a true Peristernia^ it 

 would not be well to sever them at present. 



I hope it will not be thought that I have been wanting 

 in charity towards the memory of Mr. Tryon by the fore- 

 going remarks. I fully recognize the difficulties he had to 

 contend with, and only wish he had consulted the museums 

 •on this side before entering on his work, more assiduously. 

 The later volumes seem more carefully compiled, and freer 

 from such errors as I have been expatiating on, than the 

 former. 



(XII.) Remarks on the Sequence adopted. — Taking 

 firstly L. aureocinctus (Sowb.), as the simplest form of the 

 genus with elongated spire, many whorled, canal very short, 

 we pass at once to craticulatus (L.) and its congeners, 

 squamosus (Pease), being the only alien form possessing 



