THE NAUTILUS. 107 



Omi-miira, Echigo. Types no. 85782 A. N. S. P., from no. 1119 

 of Mr. Hirase's collection. 



This species of the Discoconulus group is larger than most other 

 Japanese forms of that type, and has more numerous closely-coiled 

 whorls than the related species. 



Function infans n. sp. 



Shell depressed, openly umbilicate, chestnut brown, the inner 

 whorls corneous ; sculptured with irregular, low and curved, rather 

 widely spaced, obliquely radial wrinkles, which are nearly obsolete 

 beneath, where a faint, close and fine spiral striation may be seen. 

 Spire flattened, the inner whorls projecting slightly. Whorls 3, the 

 last wide, obtusely angular at the periphery, much more convex be- 

 neath. Peristome thin and acute. Alt. 1, diam. 1.9 mm. 



Hachijo, Izu. Types no. 85781 A. N. S. P., from no. 1067a of 

 Mr. Hirase's collection. 



This shell is more angular than the allied P. amblygonum. The 

 generic reference is uncertain. 



Kallella sororcula n. sp. 



Shell minutely perforate, trochiform, the spire conic with very 

 slightly convex lateral outlines and obtuse apex, base convex ; thin, 

 brown, nearly lusterless above, tiie base somewhat glossy. Whorls 

 nearly 6, convex, the last with an acute, thread-like peripheral keel, 

 which may usually be seen in the suture of tlie preceding whorls. 

 Aperture oblique, rather narrow. Peristome thin and acute, the 

 columellar margin arcuate, narrowly reflexed and thickened. Alt. 

 3, diam. 4.8 mm. 



Amasaki, Tosa. Types no. 85771 A. N. S. P., from no. 1109 

 of Mr. Hirase's collection. 



With the shape of K. (?) ceratodes Gude, this species lacks the 

 brilliant gloss of that, the surface being dull, like the much larger 

 K. gudei Pils. and Hir., and it is seen to be faintly striatulate under 

 a strong lens. 



PUBLICATIONS KECEIVED. 



The Paleontology and Stratigraphy of the Marine 



Pliocene and Pleistocene op San Pedro, California By 



Ralph Arnold (Mem. Cal. Acad. Sciences III, 1903). 4to, 420 

 pp., 37 plates. This important work, which has engaged Mr. 

 Arnold's attention for some years, consists of three parts, of which 

 Part I is devoted to general descriptions of the Pliocene and Pleisto- 

 cene beds, their stratigraphy and faunal relations. Mr. Arnold 

 concludes that during the latter part of the Pliocene the climate was 

 much colder than at present, 18.5 per cent, of the species of the 



