24 THE NAUTILUS. 



smooth. Whorls 5, moderately convex, the penult, and last of about 

 equal diameter. Aperture small, somewhat oblique ; peristome well 

 expanded, much thickened within, the outer lip broad, with a blunt 

 tootlrabove the middle, columella truncate at base ; parietal lamella 

 strong. Axial lamella becoming a very wide spiral plate within, 

 bent into strong waves. Length 1.84, diam. .04 mm. 



Yaeyama Island (Mr. Y. Hirase, no. 618). 



This species is smaller and more eylindric than C. noduliferum, is 

 smooth, and the internal axial lamella is more strongly waved. 0. 

 noduliferum was described from Misaki, and has been sent by Mr. 

 Hirase from Nishigo, Prov. Uzen. It is a strongly tapering shell, 

 finely but sharply and regularly striate, and in most adults has a 

 palatal nodule within the outer lip, though this is variable in devel- 

 opment. It is larger than 0. cymatoplax, length 2.2 mm. 



NEW PUBLICATIONS. 



Digesta Malacologica, No. 1. A Summary of the American 

 Journal of Conchology. By E. R. Sykes. 1 Under the above caption 

 Mr. Sykes proposes to issue a series of digests, prepared after the 

 mod 1 of those in the Zoological Record. " It has been a constant 

 source of difficulty for many years past to ascertain what work has 

 been done by our predecessors, relating either to a special genus or 

 to some faunal district. With the idea of rendering some assistance 

 to students, the present work has been undertaken." The number 

 before us deals with the American Journal of Conchology, and com- 

 mences with a table of dates of publication, followed by a list of titles 

 arranged by authors. The contents of the articles are then referred 

 to under the heads of Anatomy, Distribution, both geographical and 

 geological, etc. The systematic portion is arranged by families, every 

 species described being referred to by volume and page. It is, there- 

 fore, easy to ascertain what the series contains relating to the mol- 

 lusks of any given region, or of any special family or genus, whereas 

 otherwise this information could be obtained only at the expense of 

 much time and labor, or found only by accident. All who have occa- 

 sion to use the Journal should possess themselves of this aid to its 

 use. The Digest is well gotten up, and seems to contain but few 

 mistakes or misprints. 



1 London, William Wesley & Son, 28 Essex St., Strand, 1901. (Price, $1.50 ; 

 to subscribers to the series, $1.25.) 



