70 GARRETT: ON POLYNESIAN MITRID^E. 



Tonga and Marquesas Islands. They were found lurking 

 beneath dead coral on the outer reefs. M. Crosse records 

 it from the Marquesas and New Caledonia. Mr. Pease ob- 

 tained two examples from the Caroline Islands, and M. 

 Paetel records it from the Philippines. My largest specimen 

 was taken at one of the guano islands in Central Pacific. 



The ground color is whitish more or less stained with 

 yellowish-brown, and ornamented with two transverse rows 

 of large, irregular, reddish-brown spots which are frequently 

 confluent. The whole surface is roughened by small, trans- 

 verse, angular ridges, which are about the same size as their 

 interspaces, which latter are longitudinally elevated Hues. 

 The ridges on the basal portion, which are more oblique 

 than those above, wind round the pillar-lip so that they 

 resemble rudimentary plaits. The resemblance is the more 

 obvious in consequence of the lip being perfectly smooth on 

 the upper portion. 



M. Crosse, who has published an accurate and interest- 

 ing history of this shell illustrated with two good figures, has 

 changed Swainson's MS. name edentuhis to Philippi, which 

 latter must I presume be adopted in preference to the former 

 negative denomination. 



The following species, not found by the writer, are recorded 

 from the Polynesian Islands : — 



1. Mitra limbifera Lam. Reeve, Conch. Icon., pi. xxiii., fig. 



180. Marquesas Islands (Paetel). 



2. Mitra ordinata Pease (Ubi). Sandwich Islands (Paetel). 



3. Mitra crassa Swain. Reeve, 1. c, pi. ii., fig. 7. Tonga 



(Grseff^e). 



4. Mitra catenata Swain. Reeve, 1. c, pi. xxxii., fig. 259. 



Panmotu Islands (Cuming). 



