24 



THE NAUTILUS. 



Excellent illustrations are scattered freely throughout the text, 

 illustrating at every point the statements made or the peculiarity 

 mentioned ; and this is a new departure in couchological treatises 



a. s. 



An Equivalve, Inequilateral Pelecypod I'nin /lii-tnriun (L.). a. s. anal or 

 excurrent siphon ; !ir. x. branchial or inuurrent siphon;/', foot. 



which can hardly be too warmly commended. The illustrations 

 herewith shown are examples, and in beauty and fidelity to nature 

 they speak for themselves. One would be critical indeed to ask for 

 anything better than the figure of Unio margaritifer or Planorbis 

 cvrneits. The species will be illustrated with colored plates, of which 

 one accompanies this part. It is a really superb piece of color- 

 printing. 



Vertigo antivertigo r/<nn>r/ii.-i corneus v. nHiinn ILii.r nemoralis 



(Drap.). Moq. L. 



Malacologists will look with interest for the succeeding parts; for 

 that before us leads us to hope that Mr. Taylor will hivak with the 

 time-honored but woefully antiquated system of generic and family 

 classification of former English manuals of land and fresh-water 

 mollusks, and adopt a nomenclature and classification abreast of 

 the science. The work will doubtless prove of great utility to those 

 interested in British malacology, especially on account of the ex- 

 haustive treatment of variation and distribution contemplated ; and 

 the features noted above will, moreover, render it useful to eonchol- 

 ogists generally. 



