210 MATHILDA. 



and distant ridges, suture impressed; whitish, sparsely dotted 

 with chestnut. Length, 1-65 inches. 



Hah. unknown. 

 T. OPALINA, Adams and Reeve. PI. 65, fig. 33. 



Whorls 12, rounded, stout, a little constricted above to a 

 sutural fasciole, smooth, very minutely striate ; yellowish white, 

 with light chestnut curved longitudinal stripes. Length, 1 inch. 



China Sea. 



Un figured Species of Mesa Ha. 



T. PLiCATA, A. Ad. Teneriffe. 



T. DECUSSATA, A. Ad. Philippines. 



T. Freytagi, Maltzan. W. Africa. 



Genus PROTOMA, Baird, 1870. 



P. Knockeri, Baird. PI. 65, figs. 34, 35. 



Elongate subulate, transversely, narrowly closely sulcate ; 

 whorls 16, flattened, with well-impressed suture, base of shell 

 with a spiral fasciole ending in a deep incision of the base of the 

 aperture; white or brown. Length, 2*5 inches. 



Whydah, W. Coast of Africa. 



Genus MATHILDA, Semper, 1865. 

 M. elegantissima, Costa. PI. 65, fig. 36 ; PI. 64, figs. 17, 18. 



Whorls 9, turreted, with rounded spiral ribs more or less 



granulated by longitudinal lines, suture narrowly channeled ; 



brownish. Diam. 11 mill. 



Mediterranean. 



M. cochlseformis (fig. 36), M. granolirata (fig. 17), and M. 



retusa (fig. 18), Costa, and M.funicalata, Tiberi, are synonyms. 



M. eleqantula, Angas. PI. 65, fig. 37. 



Whorls 14, thin, translucent, nearly flat, whitish, each with 



three rounded spiral ribs, the one next the suture smallest, 



between the ribs finely longitudinally striate, striae raised and 



very thin, base of last whorl smooth and flattened ; nuclear whorl 



sinistral. Length, 11 mill. 



Foi't Jackson, Australia. 



