THE NAUTILUS. 137 



The Euhadra section of Eulota is represented by two fine species. 

 Fig. 3 is E. callizona var. dixoni Pils. (NAUTILUS XIV, p. 60). 

 This elegant shell is from the province Idzumo. It is named for the 

 President of the Academy of Natural Sciences. Fig. 4, E. sencken- 

 bergiana var. awaensis Pils., is a race from f-Jhikaku of the species 

 from western Japan, the largest Japanese Helix. Figs. 5, 6, Plecto- 

 tropis elegantissima var. cara Pils. (NAUTILUS for Jan., 1901, p. 

 107) is from Great Riukiu Islands. 



Ganesella Pargillierti Phil., from the same island (fig. 13), is a 

 very characteristic Riukiuan snail ; and fig. 1, G. myomphala Mart., 

 is the largest Japanese member of the same genus, and to my eye, 

 one of the most beautiful Helices. It is rather widely distributed in 

 southern Japan. 



Glausilia marlensi var. reiniana Kob., is the largest living Clau- 

 silin. It is not an uncommon species in central Japan. 



Cyclophorus hirusei Pils. and Pupinella oshimce Pils. are two 

 operculate forms from the island of Oshima, in (he " Riukiu Curve." 



Figs. 710 belong to the wonderful fauna of the Bonin Islands 

 (Ogasa\vara-jima). These mere dots on the great Pacific have a 

 varied snail population of about 50 species, all but half a dozen dis- 

 covered by Mr. Hirase's collectors, chiefly by Mr. Nakada, whose 

 work is deserving of high praise. Fig. 7 is the var. trifasciata of 

 mandarina mandarina Gray, from Nakanojima, a little islet not 

 shown on ordinary maps. The genus Mandarina comprises a half 

 dozen species, the largest, M. mschenberyeriana Pils., NAUTILUS 

 IV, p. 64, figs, in text, exceeding our big Polyr/yra chilhoiceensis in 

 size. It was supposed before Mr. Hirase's explorations, to be from 

 the Riukiu Is. The species of Mandarina are all from the Bonin 

 Is., and are strong, solid shells, related to a Chinese group of which 

 the common Camsena cicatricosa is a well-known member. Fig. 8 

 is Fcimetesta mirabilis Pils., from Hahajima. the southern large island 

 of the Ogasawara group. The name " wonderful starved shell " is 

 from its lank, emaciated appearance. Hirasea profundispira Pils., 

 fig. 9 (NAUTILUS XVI, p. 47), is one of the numerous genus 

 Hirasea (NAUTILUS XV, p. 118), consisting of small shells very 

 peculiar in shape. Hirasiella clara Pils., fig. 10 (NAUTILUS XV, 

 April, 1902), is the sole representative of a related genus. These 

 genera are all confined to the Ogasawara -jima. 



