OF CONCHOLOGY. 121 



Defl. 60°. Shell very thin and fragile. 



Habitat. — Seniavine Strait near Plover Bay, E. Siberia, one 

 living specimen. 



Alt. 1-15 ; lat. -9 in. 



All the forms are strongly bicarinate, and in a fresh condition 

 are covered with a strong epidermis, produced on the carinae 

 into triangular filaments. 



I do not feel sure that this is the shell intended by the figures 

 in Sowerby's and Chenu's Conchological Manuals, though in re- 

 spect to the umbilicus they resemble it more than the typical 

 form. In both figures the aperture is too much rounded, and 

 the spire too short and stout. Chenu figures a much stronger 

 process on the columella than exists in the present form, and 

 the umbilicus of Sowerby's figure is too large. Further speci- 

 mens are needed to determine whether any of these should be 

 raised to the rank of species, though Dr. Stimpson, who exam- 

 ined them with me, was disposed to so consider them. The 

 specimens referred to in the preceding comparative diagnoses 

 are nearly of uniform size. 



PEDICULARIID^E. 



Pedicularia Japonica, n. s. 



Testa elongato-sinuata, albida et purpurea suffusa ; valde 

 transverse striata, vertice umbilicata ; supra mammillata ; infra 

 longitudinaliter compressa, sinuata; labio arcuato ; columella 

 inconspicua, recta ; apertura elongata, angusta, sinuata ; extre- 

 mitatibus canaliculars. Lon. *5, lat. "24, alt. -24 in. 



Shell elongated, sinuated ; whitish, with an irregular suffusion 

 of rose pink, apex yellowish pink, interior darker, livid pink. 

 Externally rather coarsely grooved and striated. Apex some- 

 what mammillated, vertex umbilicated. Columella straight, 

 inconspicuous. Shell laterally much compressed, sinuated ; late- 

 ral margins much produced, concave, effuse ; extremities narrow, 

 canaliculate. 



Habitat, Niphon, Japan, 60 fms. on G-orgonia, R. Pumpelly. 



This species differs in its elongated, compressed and sinuated 

 form from any described species. The striae are coarser than in 

 P. Paeifioa, which also has the vertex apparently covered and 

 not umbilicated, the striae granulate and decussated, and is of a 

 uniform tint ; beside which the columella is much thicker and 

 more prominent. P. sicula bears no resemblance to it. P. call- 

 fornica, Newc, is more globose, widely effuse, shorter, and 



