WEB6. Hexaconus echinatus, n. sp. (P1. 140,fig. 12). Six hydrotomical spines of unequal size; the two equatorial, andtheir sheaths twice as large as the four polar spines. These six โฆ
WEBHexaconus echinatus, n. sp. (Pl. 140, fig. 12). Six hydrotomical spines of unequal size; the two equatorial, and their sheaths twice as large as the four polar spines.