GUTTURNTTTM. 23 



Has fewer varices, and the shoulder angle is not so gibbously 

 nodulose as in the next species ; yet I suspect them to be 

 identical. 



T. GIBBOSUS, Brod. PI. 12, figs. 101, 103. 



Shell with four varices ; gibbous ; strongly tuberculated on 

 the margin of the flat shoulders ; spire scalariform ; surface 

 closely covered with chain-like minute tuberculations. Yellowish 

 brown. Length, 2*5 inches. 



Panama; Monte Ghristi, W. Columbia, 7 fathoms, coarse sand. 



T. LOBBECKEI, Lischke. PL 12, fig. 106. 



Very closely allied in general appearance, with T. exaratus 

 Reeve, but the whorls are rounder, with shorter spire and canal ; 

 shoulder more rounded ; spiral striae finer; ribs between the 

 varices obsolete. Length, 1*5 inches. 



Japan. 

 T. PFEIFFERIANUS, Reeve. PL 13, fig. 107. 



Yellowish white, with irregular darker bands ; whitish within 

 the aperture. Length, .2'5-3 inches. 



Philippines. 

 T. RETUSUS, Lam. PL 13, fig. 108. 



Yellowish-brown, sometimes maculated or banded with darker 

 brown ; aperture white within. Length, 2 to 2-5 inches. 



Indian Ocean, Mauritius. 

 T. PYRULUM, Ad. & Reeve. PL 13, fig. 109. 



Light yellowish brown. Length, 1'to inches. 



East Indies. 

 T. ENCAUSTICUS, Reeve. PL 13, fig. 110. 



Light yellowish brown. When adult, the columella and lip 

 are thickly enamelled, pale orange-brown. Length, 1-f 5 inches. 



/. Ticao, Philippines ; on the reefs. 



T. TUBEROSUS, Lam. PL 13, figs. 111-113. 



Light to dark brown, the ribs and tubercles lighter or whitish, 

 with sometimes, a median white band. Lip and columella thickly 

 enamelled, white or yellowish ; interior of aperture orange red. 

 Operculum with terminal nucleus. Length, 1'5 to 2'5 inches. 

 West Indies, Indo-Pacific 0., Mauritius, Polynesia. 



