EPIDROMIJS. 25 



T. CONVOLUTUS, Brod. PL 13, fig. 118. 



White ; whorls encircled by sharp, close revolving ridges. 

 Length, 1*25 to 2 inches. 



Marquesas (7 to 10 fathoms, sandy mud); New Guinea, 

 (22 fathoms soft mud); Philippines. 



T. SCALARIFORMIS, Brod. PI. 13, fig. 119. 



White ; with sharp, close-set revolving ribs, crossed by slighter 



longitudinal ribs. Length, '80 to 1*60 inches. 



Panama. 



Although the specimen figured shows sufficient distinction, I 

 have individuals of intermediate character before me which ren- 

 der the separation of this and the last species somewhat doubtful. 

 Typically, the position of the varices is different, and the decus- 

 sated striae of T. Scalariformis are coarser. 



T. SPECIOSA, Angas. PI. 13, fig. 120. 



Shell with from 20 to 22 conspicuous, erect, rounded varices ; 

 yellowish white, with sometimes a pale chestnut, narrow band ; 

 with alternately larger and smaller concentric ridges, decussated 

 by sharp, raised striae into bead-like nodules ; aperture white 

 within. 



Port Jackson, Australia; at very low spring tides. 



The number of varices suggests the genus Trophon. I have 

 not seen the species. 



Subgenus Epidromus, (Klein) Adams. 



T. MACULOSUS, Gmelin. PI. 14, fig. 121. 



White, shaded and spotted with chestnut-brown ; aperture and 

 columella white. Length, 3 inches. 



Mauritius, Philippines, Amboina, Red Sea. 

 T. TENERUS, Gray. 



" Shell ovate, turreted, thin, pale, fulvous, pellucid, cancellated, 

 with equally fine longitudinal and spiral ridges ; spire attenuated, 

 longer than the mouth ; whorls rounded ; varices rounded ; can- 

 cellated, with two brown spots. Mouth ovate, oblong; outer lip 

 crenulated ; throat smooth ; inner lip thickened ; smooth, elevated, 



canal short, perforated in front. Axis, 3'5 inches. 



Hdb.f 



