68 GARRETT: ON POLYNESIAN MITRID^E. 



This genus was established by Mr. Pease for a singular 



species of Mitridce. shaped like Dibap/nis, Phil, but has the 



spire much more produced and the columella with numerous 



small slightly oblique plaits. 



i66. Mitroidea multiplicata Pease. Proc. Zool. Soc, 1865, 



P- 514- 



This species, which appears to be very scarce, was 

 obtained at the Panmotu and Samoa Islands. A single 

 example was found at each of the above groups. The 

 Panmotu shell, which was living when found, occurred under 

 a large block of dead coral on the shore margin of the outer 

 reef at Makaimo, one of the large windward islands. i' 



The Samoa specimen, which is larger than the former, 

 was obtained in a dead condition, but very perfect, on the 

 outer reef at Upolu. Mr. Pease's type was taken at one of 

 the guano islands in Central Pacific. 



Our shells are pure white, with distant, transverse, hair- 

 like brownish-yellow, slightly impressed lines^ under a smooth, 

 shining, luteous epidermis. The whole surface is striated 

 with very fine transverse impressed lines, which are most 

 conspicuous towards the acute apex. The narrow, con- 

 tracted aperture occupies three-fifths of the length of the 

 shell, and the columella exhibits 9 — 10 small plaits. The 

 thick smooth outer lip is slightly involute. The outlines of 

 the spire are flatly convex, and the whorls nearly plain. The 

 body whorl is slightly convex, and the base is truncate and 

 deeply notched. 



Length 30, diam. 12 mill. 



Genus DIBAPHUS Philippi. 



Arch. Wieg., 1847, p. 61. 



The close resemblance of this remarkable shell to cer- 

 tain species of Conus, particularly C. mitratus, (which is also 



