6 PHILINE. 



The squarish form and close, simple striae are characteristic, 

 though in some specimens the grooves are rather irregular and 

 more spaced, and subobsolele on the base. Often there is an ap- 

 pearance of two or three faint, more hyaline bands on the back. 

 Occasionally the grooves of the outer surface project as slight raised 

 threads inside the shell, as Lischke describes for P. scalpta Ad. The 

 dentition according to Tapparone-Canefri, is after the formula I'O'l, 

 laterals denticulate. The gizzard-plates of specimens collected by 

 Frederick Stearns are well calcified, two of them large, subtriangular, 

 with a slight swelling on the middle of the long side, ends attenu- 

 ated ; the third is shorter, much narrower and fusiform. P. stria- 

 tella T.-C. is undoubtedly synonymous ; the type measured 14 x 11J 

 mill., exactly the dimensions of a specimen collected by Stearns. 



P. SCALPTA A. Adams. PL 2, figs. 21, 22. 



Shell oblong ovate, white, thin, semipellucid ; subplicate length- 

 wise, the folds irregular, engraved by wavy, transverse, distant im- 

 pressed lines. Aperture ample ; columellar margin thin, acute; lip 

 regularly arched, rounded posteriorly. (Ad.}. 



Bay of Yedo (Lischke) ; Tsu-Sima 30 fms. ; Corea Strait, 46 fins. 

 (Ad.). 



P.sealpta AD., Ann. Mag. N. H. (3), ix, p. 160 (Feb., 1862). LIS- 

 CHKE, J.M.-C. ii, p. 171 ; iii, p. 76, pi. 5, f. 15, 16. cf. P.sculpta 

 (sic'), Tap.-Can., Viag. Magenta, p. 109. 



Bulla exarata Ph., or Haminea siiiensis A. Ad., is the only species 

 resembling this in sculpture ; but the form is very different ; the 

 body-whorl in that species is large, and the outer lip narrowed pos- 

 teriorly and greatly produced. (Ad.}. 



Lischke has figured this species from specimens collected in the 

 Bay of Yedo, and gives the following notes: These have much 

 similarity to P.japonica in form, especially in the proportion of the 

 convolute portion of the shell to the extremely wide aperture ; but 

 the shell is thinner, narrower, equably and less strongly convex than 

 in P.japonica; the spire is only superficially sunken, the columella 

 without bordering groove, the outer lip not so much extended above. 

 Especially different is the sculpture, which here consists of coarse, 

 irregular growth-striae and more deeply cut, less wavy spiral grooves, 

 more widely spaced, with broader smooth girdles between. These 

 grooves are so deep in comparison with the thickness of the shell 

 that they form fine raised lines on the interior of the aperture. 



