134 BULIMULUS-BOSTRYX-TEMESA. 



i, p. 195, pi. 5, f. 6 (shell). PFR., Monogr., ii, p. 161 ; iii, 403 ; iv, 

 462 ; vi, 101. B. solutus REEVE, Conch. Icon., pi. 75, f. 540. 



About twenty specimens collected, all of the same form. The 

 young shells with four whorls resemble an obese Bulimus with nar- 

 row umbilicus; subsequent whorls become free and two-keeled. 

 With the exception of the first smooth whorls, the shell is roughened 

 by rather coarse and irregular longitudinal wrinkles. 



B. HOLOSTOMA Pfeiffer. PI. 44, fig. 3. 



Shell small, rimate-umbilicate, very narrowly cylindric-tapering, 

 rather thin ; fleshy-ashen. Surface lusterless, sculptured with very 

 coarse unequal and irregular fold- like ribs. Spire slowly tapering, 

 the apex very obtuse, upper 1J whorls rounded, glossy, corneous 

 and smooth ; following whorl weakly plicate, becoming somewhat 

 shouldered ; the remaining whorls more or less flattened at periphery, 

 subangular above and below ; the sutures very deeply constricting. 



Aperture small, contained about 4 times in length of shell, 

 squarish-oval ; peristome continuous, very shortly free, slightly thick- 

 ened at position of contact with preceding whorl, and with the col- 

 umellar margin a trifle expanded. 



Alt. 8, diam. 2'8 mill. (Specimen). 



Alt. 9, diam. 2f mill. (Pfr.). 



Cobija, Chili (Paz). 



Bulimus holostoma PFR., P. Z. S., 1846, p. 28 ; Monogr., ii, p. 161. 

 REEVE, Conch. Icon., pi. 69, f. 490. HIDALGO, Journ. de Conch., 

 1870, p. 56. 



This form differs from B. scalaricosta and tubulatus in the restric- 

 tion of the umbilicus to a narrow perforation, and in the very deep 

 sutures. This last character, with the blunt angulation of the 

 whorls, allies it to B. solutus. 



Section 4. Temesa H. & A. Adams, 1855. 



Temesa ADS., Genera Recent Moll., ii, p. 175, for australis Forbes, 

 clausilioides Rve.,/wicH Pfr., glorifica Parr., livida Mke. O. SEM- 

 PER, Journ. de Conchyl., 1866, p. 42, restricted to australis Forbes, 

 clausilioides Rve.,/wncH Pfr. FISCHER, Man. de Conchyl., p. 483, 

 clausilioides mentioned as an example. 



Shell sinistral, much elongated and narrow, perforated, with 

 numerous (9) whorls ; aperture squarish, the lip simple. Type B. 

 clausilioides Reeve. 



