16 PEOSOPEAS. 



whitish; spire turrited, the sides very slightly convex, the 

 apex rather acute. Whorls 8%, very slowly increasing, sep- 

 arated by an impressed, sub-margined suture, the upper ones 

 somewhat convex, the later whorls flat in the middle, striat- 

 ulate, the striae oblique, sigmoid; last whorl one-third the 

 shell 's length. Aperture oblique, semioval ; peristome simple, 

 acute, the right margin somewhat protracted above, columel- 

 lar margin oblique, somewhat straightened, and closing the 

 umbilical crevice with a distinct callus. Columella slightly 

 twisted, obliquely entering, the median part flattened, base 

 slightly emarginate, not truncate. Length 50.5, diam. 8.12, 

 aperture 9.5 mm. long, width (including callus) 5 mm. 

 (Mlldff.). 



Cebu: village of Tuburan, on the west coast. 



Prosopeas suturale MLLDFF., Bericht Senck. Nat. Ges., 

 1890, p. 246, pi. 8, f. 10. 



Related to P. pagoda Semp. of Montalban, from which it 

 differs by the smaller number of whorls of full-grown shells, 

 convexly-turrited shape, higher and broader shell, and by 

 having no angle between columellar and basal margins of 

 the mouth. Like other species of this difficult group, it varies 

 in the relative width of the shell. A specimen was found 

 only 7.37 mm. wide with a length of 30.5. Another is 8.25 

 wide, length 25.5 mm. 



2. P. COCHLIODES (Pfeiffer). PI. 5, figs. 25, 26, 27. 



Shell imperforate, turrited, solid, obliquely regularly stri- 

 ate, whitish; apex rather obtuse; suture impressed. "Whorls 

 9, rather flattened, the last one-fourth the total length. Colu- 

 mella somewhat thickened. Aperture oblong-oval; peristome 

 simple, unexpanded. Length 48, diam. 12, aperture 12.5x6 

 mm. (Pfr.). 



Philippines: Cuyo (Cuming). Sibuyan (Mlldff.). Tablas 

 (Mlldff., subsp. planogyra). 



Bulimus cochliodes PFR., P. Z. S., 1842, p. 151; Monogr., 

 ii, 152. Bulimus cochleades REEVE, Conch. Icon., v, pi. 14, 

 f. 82. Prosopeas c., MLLDFF., with mut. extensa Mlldff. and 

 subsp. planogyra Mlldff., Abhandl. Nat. Ges. Gorlitz, xxii, 

 1898, p. 155. 



