2S GARRETT: ON POLYNESIAN MITRID^. 



last whorl ; interstices with two or three raised revolving 

 lines ; aperture narrow, a little less than half the length of 

 the shell ; outer lip rather thin and crenulated ; columella 

 with 5 plaits. Length 17 mill. (Mus. Godeffroy.) 



Habitat Viti Island. 



A single perfect example was obtained on the Koro 

 reefs. 



55. Mitra scabriuscula Linnaeus. Reeve, Conch. Icon., pi. 



v., fig. 35- 



This fine species is not uncommon at the Society, rare 

 at the Panmotu, and very rare at the Viti Islands. It is 

 invariably found in sandy stations, and not on reefs as stated 

 by Reeve. 



Our specimens are a little larger and more attenuated 

 than Reeve's figure, which is shaped too much like sphaerulata, 

 from which it differs in its more acuminate spire, more 

 delicate sculpture and different color. The aperture is in- 

 variably pure white. 



Dr. Graiffe obtained examples at Upolu, Samoa. 



The animal is diluted-white, maculated with numerous 

 small opaque white spots. 



56. Mitra typha, Reeve, 1. c, pi. xxxiii., fig. 267. 



We found four examples of this small rare Mitra on the 

 fringing reefs at Kioa, Viti Island. 



57. Mitra tabanula l>amarck. Reeve, 1. c, pl.,xxxix., fig. 332. 



The single very perfect specimen now before me was 

 obtained in the Viti group, but am unable to state the precise 

 locality. 



It agrees in every respec: with .eeve's description, and 

 very closely with his incorrectly colored figure. It is shaped 

 like M. tiirgida, and is of a dark brownish-red color, with 

 rather large, keel-like spiral ribs, which are very pale and 

 smooth on their eda;es. 



