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, lovent. 
bb. No uncini; shell wider. 
ce. Shell spirally striolate. 
d. Striate delicate, wavy, close: finmarchica, ossiansarst, 
fragilis, japonica. 
dd. Striz thick, opaque: cingulata. 
ec. Very smooth ; no spiral strive: aperta, infortunata. 
aa. Gizzard-plates rudimentary, cartilaginous; 2 uncini on each 
side; shell with spiral series of oblong rings: punctala, 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 tale; 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 Lovén, except in its 
sculpture. Distinguished from P. vitrea by its offstanding lip and 
silvery grooves. (Gid.). 
Hakodadi Bay, Japan, 2-6 fms. (Stimp.): 
Philine argentata Gup., Proc. Bost. Soe. vii, p. 189 ; Otia, p. 111. 
P. acurancuLa A. Adams. Unjigured. 
Shell rather squarely ovate, white, thin, somewhat truncated be- 
hind; transversely sulcate, the sulci excavated-punctate; last whorl 
