20 GARRETT: ON POLYNESIAN MITRID^. 



34. Mitra lugubris Swainson. Reeve, 1. c, pi. xxi., fig. 166. 



Mitra ( Chrysame) lacunosa Schmeltz. Cat. Mus. Godeff. 

 No. iv., p. 83. Mitra ( Scabricula) lacunosa Paetel. Cat. 

 Conch., p. 40. Mitra lugubris Schmeltz. Cat. Mus. Godeff., 

 No. v., p. 1 1 7. 



Excepting the Marquesas and Cook's Islands, we found 

 this species distributed throughout Polynesia. Though not 

 uncommon in the Western groups it is very rare elsewhere, 

 and occurs in reefs. 



Our shells are colored the same as stated by Reeve and 

 represented in his figure; but the latter is more ventricose, 

 and the description reads '■'■shell ovate,^' whereas our shells 

 are precisely the shape of his lacuvosa, which he describes as 

 ^'■oblong-ovate." He states that lugubris is ^'encircled 7vith 

 impressed strice." Several very perfect specimens now before 

 me are all transversely ridged, the ridges more or less convex 

 or angulate and the conspicuously grooved interspaces are 

 punctured. The whole surface is also more or less distinctly 

 grooved longitudinally. The aperture is white or bluish-white 

 and the upper half of the columella lip is deep brown. 



It will be observed that the sculpture of our shells are 

 prcisely the same as lacunosa, but he represents the colors as 

 different, and states that the columella has only four plaits, 

 one less than the shells under consideration. 



I am inclined to believe the two species are identical. 

 Reeve's lacunosa may have been discolored, and his lugubris 

 may have had the transverse ridges so much flattened that 

 the shell appeared to be simply grooved. 



The Pacific shells which are shaped and sculptured like 

 the former, with the precise coloration of the latter, are by 

 some authors referred to lacunosa and by others to lugubris. 



35. Mitra muricu lata Lamarck. Reeve, 1. c, pi. xxvi., fig. 205. 



A single specimen found washed up on the beach on 



