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thin, produced in a roundly-angular lobe above the vertex. 
Columella deeply and uniformly concave. Inner lip a mod- 
erately wide glaze. A minute rimate umbilicus. 
Sculpture.—Numerous, flat, low spiral lire, about one- 
third the width of their interspaces: at the vertex obsolete, 
in the middle more crowded. Subdistant accremental striz: 
and undulations. 
Dim.—Length, 4°3 mm. ; breadth, 3°55 mm. 
Locality.—In 130 fathoms off Cape Jaffa, 1 dead. 
Ve nO /F) glaja troubridgensis, n. sp. Pl. xx., figs. 4 and 5. G94 
oat % Shell about two and a half whorls, detached ; depressed 
conic; apex somewhat lower than the rest ; inner margin not 
uniformly curved, thick, opaque white to an irregular depth 
varying from 2 to 4 mm. ; outer part thin, translucent, with 
a membranous edge; surface irregularly corrugated by ob- 
liquely retrocurrent folds, which roughen the inner margin. 
Internally somewhat rugose. 
Dim.—Greatest diameter, 21 mm.; smallest, 15 mm. ; 
height, 21 mm. 
Locality.—Troubridge Island, among the rocks. Ani- 
mals collected by Miss Fraser. Shells only preserved. 
Obs.—Whether an Aglaja or a Navanax, an examina- 
tion of the animal will decide. I have adopted Renier’s gen- 
eric name instead of the Doridium of Meckel, following 
Tryon. 
