28 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



AMPHIDROMUS ENTOBAPTUS ENTOBAPTUS Dohrn. 



Plate 13, figs. 4-9. 



Amphidromus perversus Hidalgo, Jouru. de Conch., vol. 35, 1888, p. 32. 

 Amphidromus entobaptus Dohrn, Nach. Malak. Gesel., vol. 22, 18S9, p. 62, 

 AmpMdromus entobaptus Smith, Proc. Zool. Soc. London, 1895, pp. 98-99. 

 Amphidromus perversus entobapta Fulton, Ann. Mag. Nat. Hist., ser. 6, 



vol. 17, 1896, p. 67. 

 Amphidromus contrarius Elera, Cat. Sist. Faun. Filip., 1896, p. 617. 

 Amphidromus entobaptus Elera, Cat. Sist. Faun. Filip., 1896, p. 618. 

 Amphidromus entobaptus Hidalgo, Mem. Real Acad. Sci. Madrid, 1898, pi. 



99, figs. 5-8. 

 Amphidromus entobaptus von Mollendorff, Abhand. Naturf. Ges. Gorlitz, 



vol. 22, 1898, p. 148. 

 Amphidromus entobaptus Pilsrry, Man. Conch., vol. 13, 1900, pp. 145-6, 



pi. 51, figs. 42-6. 



Shell sinistral, stout, elongate-ovate to ovate, varying in color from 

 almost white to pinkish buff on the outside ; inside, light orange buff 

 or huffish yellow. The early whorls are usually soiled white, with 

 a narrow ashy band immediately above the suture. All the whorls 

 are decidedly appressed at the summit, strongly rounded, and marked 

 by decidedly retractive lines of growth. Aperture large; outer lip 

 reflected to form a thickened peristome, the edge of the lip being 

 almost white; columella somewhat sigmoid, reflected over the base 

 in the shape of a callus; parietal wall covered with a thick callus con- 

 necting with the columella ; columella and the parietal callus of the 

 same color as the edge of the outer lip. 



Eighty-five specimens of this species were collected by the U. S. 

 Fisheries steamer Albatross Philippine expedition, Cat. No. 254917, 

 U.S.N.M., at Ulugan Bay, Palawan, which is a short distance to the 

 north and across the island from the type-locality, Puerto Princesa. 

 Twenty-five of these taken at random give the following measure- 

 ments and data : 



