LOO CHOO MOLLUSKS. 175 



Potamides telescopium Linn. Tryon, Man. Vol. 9, p. 161, pi. 33, fig. 56. 

 Yaeyama. 2 small shells, 4 cm. 



Potamides (Aphanistylus) sinensis Phil. Tryon, Man. Vol. 9, p. 164, pi. 34, fig. 

 97. Yaeyama Is. 



Cerithium moms Lam. var. rugosum Wood. Tryon, Man. Vol. 9, p. 134, pi. 24, fig. 

 47. 



Yaeyama. 1 shell. 



rithium (Liocerithum) 

 32. 



Yaeyama. 3 shells. 



Cerithium (Liocerithum) piperitum Sby. Tryon, Man. Vol. 9, p. 144, pi. 27, fig. 

 32. 



VERMETID.E. 



Thylacodes dentiferus Lam. (?).* Yaeyama. 

 Petaloconchus sp. undet.* Loo Choo Is. 

 Siphonium maximum Sowb.* Yaeyama. 



LITTORINIDJE. 



Littorina (Melaraphe) ziczac Chem. (var.). Tryon, Man. Vol. 9, p. 251, pi. 45, 

 figs. 5-7. 



Yaeyama. 48 living shells, found with a lot of Melampus. 

 Littorina littoralis Liun. Tryon, Man. Vol. 9, p. 242, pi. 41, figs. 5-8. 



Yaeyama. 10 live shells. 

 Littorina scabra Linn. var. filosa Sby. Tryon, Man. Vol. 9, p. 244, pi. 42, fig. 28. 



Yaeyama. 

 Echinella oumingi Phil.* Yaeyama. 



BOLABIIDJB. 



Solarium cingulum Kien.* Nago Is. 

 Solarium hybridum Linn.* Nago Is. 



CYCLOPHORID.E. 



Cyclophorus turgidus Pfr.* 



Miya-Kojima ; Yaeyama. The shells from the locality first men- 

 tioned above are typical, agreeing well with the figures in the Conch- 

 ylien Cabinet. The specimens from Yaeyama differ in having the 

 peripheral keel almost, or in some specimens wholly, obsolete. 

 Leptopoma vitreum Less.* Yaeyama. 

 Cyclotus taivanus H. Adams.* 



Miya Kojima Is. A single specimen, apparently not differing 

 from this Formosan species. 



