90 JAPANESE MOLLU8K8, PHASIANELLlDvE. 



Collonia Auct non Gray. 



Leptonyx and Homalopoma Cpr. (prxoc. ). 



Cantraineia Jeffr. 



Anadema Ads. 



Petropoma Gabb. J. A. N. S., Phila-, VIII, p. 281. See Nautilus, VII, p. 

 84. 



L. sanguined Linn, has erroneously been recorded from Japan and West 

 America. It is Mediterranean. 



Leptothyra amussitata Gld. Man. Conch., X, p. 250, pi. 55, f. 71, 72 ; Ann. Mag., 

 1875, Vol. XVI, p. 109. 



Endermo, 4-7 fathoms ; a variety from Yamado, 7 fathoms, sand 

 (St. John). 



Leptothyra purpurascens Dkr. Index, p. 129, pi. 12, f. 1-3. 



Japan (Dkr.). 

 Leptothyra rubra Dkr. Ind. Moll. Mar. Jap., p. 128, pi. 12, f. 7-9. 



Japan (Dkr.). 

 Leptothyra transenna Watson. Challenger Gastrop. XV, p. 125, pi. VI, f. 12. 



Japan 565 fathoms. 



Leptothyra pilula Dkr. Moll. Jap., p. 19, pi. 3, f. 7. (Liotid). Cynisca japon- 

 ica Ad. is a synonym. 



Corea Strait (Ad.). 

 Leptothyra nooturna Gld. Otia Conch., p. 160 ; Ann. Mag., 1875, XVI, p/109. 



Simoda (Stimpsou) ; Lat. 41 12' N., Long. 140 45' E., 43 fatb., 

 sand and mud ; variety from Yamada Harbor (St. John). 



PHASIANELLIDJE. 



Phasianella megastoma n. sp. PI. VIII, fig. 9. 



Shell imperforate, in shape like Ph. (Chromoti*) neritina but the 

 spire longer and more pointed. Surface smooth, hardly shining ; 

 either dotted closely and evenly all over with red on a pale huffish 

 ground, or having several spiral girdles of white spots, and a sub- 

 sutural series of white flames ; the apex yellow or whitish. Whorls 

 3$, very rapidly increasing, the last expanding toward the aperture. 

 Aperture round-oval, very large, oblique; columella and parietal 

 wall regularly arcuate, with a moderate deposit of callus. Opercu- 

 lum white outside. Alt. 3*2, diam. 2'9 mill. 



Nemoto, Boshiu (Fr. Stearns). 



The extremely large aperture sufficiently characterizes this spe- 

 cies. 



