4 PHILINE. 



Partial Key to Species of Philine. 



a. Gizzard-plates distinct, calcareous. 



b. Uncini 1 on each side, rudimentary ; shell spirally chain- 



striate, oblong : scabra, catena, loveni. 

 bb. No uncini ; shell wider. 

 c. Shell spirally striolate. 



d. Striate delicate, wavy, close : finmarchica, oss!ansarsi r 



fragilis, japonica. 



dd. Striae thick, opaque : cingulata. 

 cc. Very smooth ; no spiral striae : aperta, infortunata. 

 aa. Gizzard-plates rudimentary, cartilaginous; 2 uncini on each 

 side ; shell with spiral series of oblong rings : punctata, angul- 

 ata. 



aaa. Gizzard-plates entirely wanting. 

 b. Uncini strong, hamate. 



c. One uncinus on each side; shell very smooth, oblong 



nitida. 

 cc. Two uncini on each side; shell spirally chain-striate. 



d. Shell ovate : quadrata. 

 dd. Shell oblong : lima, 

 bb. Uncini delicate, exserted, little curved, 

 c. Six uncini on each side. 



d. Shell latticed : pruinosa. 

 dd. Shell striated lengthwise : flexuosa. 

 cc. Two uncini on each side ; shell very smooth : velutinoides* 



P. ARGENTATA Gould. Unfigured. 



Shell square-ovate, compressed, very thin, lucid, with the luster 

 of talc ; concentrically waved and engraved with transverse silvery 

 lines. Apex indented and calloused ; lip widely standing out be- 

 hind, subtruncate in front; columella with a distinct fold. Length 

 6, diam. 5 mill. Very much like P. scutulum Loven, except in its 

 sculpture. Distinguished from P. vitrea by its off-standing lip and 

 silvery grooves. ( Old.*). 



Hakodadi Bay, Japan, 2-6 fms. (Stimp.) 



Philine argentata GLD., Proc. Bost. Soc. vii, p. 139 ; Otia, p. 111. 

 P. ACUTANGULA A. Adams. Unfigured. 



Shell rather squarely ovate, white, thin, somewhat truncated be- 

 hind ; transversely sulcate, the sulci excavated-punctate; last whorl 



