TIRRITELLA. 203 



T. Knysnaensis, Krauss. PI. 63, fig. 84. 



Whorls 1", convex, with profound suture, with two approxi- 

 mate central keels (three on last whorl), and narrower spiral 

 lines ; whitish marbled and longitudinally strigate with chestnut. 



Length, 1 inch. 



Cape of Good Hope. 

 T. ANXULATA, Kicuer. PI. 63, tig. 85. 



Whorls 20, sloping above, then two-keeled with a narrow 

 intervening sulcus, closelj^ striate, the strise above and below 

 the keels stronger than in the sulcus; yellowish white, 

 obscureh' longitudinally flamed with light chestnut. 



Length, 2-75 inche«. 



Wed Africa. 

 T. GuNNii, Reeve. PI. 63, figs. 86, 87. 



Whorls 18, flattened, irregularly inconspicuously ridged and 

 striated, suture excavated ; whitish, with chestnut-colored waved 

 flames, aperture light purplish. Length, 2 inches. 



Tasmania. Australia. 

 Yar. Tasmanica, Reeve. Fig. 87. 



Whorls 1.5, rather flattened, ridged at the lower edge, encir- 

 cled with two ridges and intermediate stripe above, interstices 

 A'erv closel}- decussated with minute oblique raised st^iJl^. 



T. iNCiSA. Reeve. PI. 63, fig. 88. 



Whorls 12, flatly convex, concavely angled at the base, spi- 

 rally verj" closely marked with engraved stride ; ash-brown. 



Length, -75 inch. 



Sydney. Australia. 

 T. i.vFRACONSTRiCTA, Smith. PL 63, fig. 89. 



Whorls about 20, convexly flattened, with excavated suture, 

 finely lirated and two-ridged ; brownish white, minutelj' dotted 

 with chocolate-color on the liraj. Length, 2 inches. 



Andaman Is. 

 T. HASTULA, Reeve. PI. 64, fig. 1)3. 



Whorls 22-23, slender, flatly convex, couceutrrcalh" plieately 

 wrinkled, last whorl swollen at the base, with the wrinkles 

 obsolete, all the whorls spirally impressly striated, the inter- 

 mediate ridges being obsoletely granulated ; ash-white, arcuately 

 streaked and variegated with purple-brown. Length, 225 inches. 



Uab. unfi-noaui. 



