1 8 GARRETT: ON POLYNESIAN MITRIDiE. 



to our notice at the Viti and Society Islands, where they were 

 obtained in coral sand on the fringing reefs. They are ex- 

 cessively rare and much smaller at the latter group. 



Our largest specimens are smaller, lighter colored and 

 more slender than represented in Reeve's figure Si^-, which 

 has the spiral ridges too large. 



It differs from nexilis in its much more attenuated form, 

 longer and more slender spire, lighter color, finer and more 

 distant lirulse, more produced and contracted base. They 

 also inhabit different stations. 



Linnseus' Voluta filaris may possibly be the same as our 

 shell. 



30. Mitra humeralis sp. nov. 



Shell small, solid, fusiform, smooth, glabrous, spire 

 acute, base contracted; whorls 7-8, flattened, the last one 

 convex, obliquely striated toward the base; body and penul- 

 timate whorl margined next to the suture with an obtuse 

 keel; aperture contracted above, half the length of the shell; 

 peristome slightly sinuous and thickened above; columella 

 with five plaits; color white, the body with two and the spire 

 with one broad yellowish spiral band. 



Length 10 mill. (Mus. Godeffroy). 



Several more or less perfect examples found in beach 

 sand on the outer coast of Anaa, Patimotu Islands. As 

 compared with M. peculiaris it is more robust, and differs in 

 the number and position of the bands, as well as in the 

 absence of spiral strise. 



31. Mitra ignobilis Reeve. Conch. Icon., pi. xx., fig. 152. 



I obtained two dead but perfect examples of this very 

 rare species on the shore reefs at the Viti group, and a single 

 less perfect one at Huahine, one of the Society Islands. 



My largest Viti specimen is one-third larger, and the 

 spire is more produced than the Philippine example figured 



