THE NAUTILUS. 137 



The Euhadra section of Erdota 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 Llzumo. It is named for the 

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

 bergiana var. awaensis Pils., is a race from Shikaku of the species 

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

 tropis elegantissiina var. cava Pils. (Nautilus for Jan., 1901, p. 

 107) is from Great Riukiu Islands. 



Ganesella PargilUerti 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. 



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

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



Cyclophninis Mruset Pils. and Pupitiella oskirnce Pils. aie two 

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

 Figs. 7-10 belong to the wonderful fauna of the Bonin Islands 

 (Ogasav/ara-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, chiefiy l)y Mr. Nakada, whose 

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

 mandarina mdndarina Gray, from Nakanojima, a little islet not 

 shown on ordinary maps. The genus Mandarina comprises a half 

 dozen species, the largest, M. ruschenbergeriana Pils., Nautilus 

 IV, p. G4, figs, in text, exceeding our big Poli/gi/ra chUlioweensis in 

 size. It was su|)posed before Mr. Hirase's explorations, to be tVom 

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

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

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

 is Fametestamirabilis Pils., from Hahajinia. the southern large island 

 of the Ogasavvara group. The name '' wonderful starved shell " is 

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

 fig. (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-iima. 



