LOO CHOO MOLLUSKS. 161 



HYDATINID^. 



Hydatina physis Lin. 3 shells. Yaeyama. 



SIPHONARIID.ffi:. 



Siphonaria coreensis Ads. & Rve.* Yaeyama. 



AURICULID.ffi:. 



Pythia scarabeus Linn. (?). 1 Shell. Yaeyama. 



Melampus cafFer Krauss. Yaeyama. Very abundant. Dr. 0. Boettger has kindly 

 determined the specimens. 



LiMN.ffi:iD.s:. 



Limnaea pervia Marts. Yaeyama. 



100 live shells (brought home in alcohol with a lot of Melampus). 



ZONITID.ffi:. 



Trocliomorpha fritzei Boettger.* PL X, figs. 9, 10, IL 

 Bttg., Nachrbl. D. M. G., 1892, p. 160. 



Dr. Boettger's excellent description of this species leaves nothing 

 to be desired. It is remarkable for the acute keel encircling the 

 umbilicus. The specimen figured is from the same island where the 

 types were originally found, Okinawa or Yaeyama ; it measures : 

 alt. 6, diam. min. 20, diam. maj. 22 mm., being slightly larger than 

 Boettger's types. 



HELICID.ffi;. 



Ganesella largillierti Philippi.* PI. X, figs. 12, 13, 14. 



Reported by Largilliert from the Loo Choo Is., and also included 

 in Boettger's list. There are three color varieties: 



Var. immaeulata Ad. & Rv. (PI. X, fig. 12). Pale, almost white 

 above, with a yellowish-green sutural margin and base ; apex white. 

 (C. Icon., f. 420). 



Var. eucosmia Pils. (PI. X, fig. 14). Body whorl begirt with dark 

 chestnut zones ; apex white or pinkish. Conf. Smith, P. Z. S. 1887, 

 p. 317. 



Var. zacosmia Pils. (PL X, fig. 13). Body whorl having a black 

 band immediately above the periphery, fading into rich reddish- 

 chestnut toward the suture ; a white or yellow band below' periphery, 

 bordered by a black zone below, the middle of the base yellowish- 

 chestnut or reddish-chestnut, apex purple. The coloring of this 

 variety is wonderfully rich for a Satsuma. 



All of the above varieties collected on Yaeyama Island. 

 Eulota (Euhadra) yaeyamensis Pilsbry. PI. IX, figs. 1, 2, 3. 



Shell sinistral, perspectively umbilicated, depressed, thin but 

 rather solid, light brown, with a supra-peripheral brown line. Sur- 

 11 



