SYRNOLOPSIS. 315 



P. (XELATA, P. SULCIFERA, P. PUNCTIGERA, P. METULA, P. VITTATA, 



all of A. Adams. Japan. 



P. TENELLA, A. Adams. Philippines. 



P. PUNCTICULATA, P. siNUATA, Gould. China Seas. 



P. ACUMINATA, Gould. Japan. 



Section MUMIOLA, A. Ad., 1863. 

 P. SPIRATA, A. Ad. PI. 74, figs. 52-54. 



White, under a yellowish or brownish epidermis, longitudi- 

 nally plicate, transversely grooved, suture channeled; whorls 8, 

 gradate ; columella with an oblique fold. Length, 7 mill. 



Philippines. 

 P. CINCTA, Carpenter. PI. 74, fig. 51. 



White; whorls somewhat rounded, with deep suture, spirally 

 costate, decussated by longitudinal riblets, most apparent near 

 the suture. Length, 3 mill. 



Southern California. 



Figured from a specimen. 



Unfigured Species. 



P. TESSELLATA. P. RETicosA, A. Adams. Japan. 



P. OVATA, P. ROTUNDATA, P. OBLONGA, P. NODOSA, all of Carpenter. 



Mazatlan. 



Section CARELIOPSIS, Morch, 1874. 

 P. STYLIFORMIS, Morch. (Unfigured.) West Indies. 



Genus SYRXOLOPSIS, E. A. Smith, 1880. 

 S. LACUSTRIS, Smith. PI. 74, figs. 55, 56. 



Smooth, glossy, imperforate, yellowish horn-color, banded 

 with white beneath the suture ; whorls 12, flattened, finely 

 striated by flexuous growth-lines, sometimes showing traces of 

 spiral stria? ; columella strongly plaited above ; outer lip with 



one or two lamellae, far within. 



Lake Tanganyika, E. Africa. 



Bourguignat, who describes (but without figures) several new 

 species, divides them into two groups, the first having two 



