44 GARRETT: ON POLYNESIAN MITRID^. 



this species on the shore reefs at Kioa, Viti Islands. 



Our examples agree in every particular with Reeve's 

 description and figure, except in the absence of the pink 

 bands, which are not represented in the latter, though alluded 

 to in the text. The " burnt black" spots between the ribs, 

 which are faithfully represented in his figure, appear to be 

 constant. The bands are whitish, under a very thin luteous 

 epidermis, which is generally more or less worn off in the 

 most perfect examples. Between the spots the ribs are of a 

 burnt-umber color, as represented in Reeve's figure. The 

 basal granules are whitish on a burnt-black ground. The 

 locality was unknown to Mr. Reeve. Paetel records it from 

 the Philippine Islands. 

 I02. Turricula exasperata Chemnitz. Reeve, I.e., p. xxL, 

 fig. 162. — Mitrea areriosa^ Lamarck. Reeve, 1. c, p. xxi., 

 fig. 16 r. 



This elegantly sculptured species appears to be confined 

 to Western Polynesia, where they occur at all the groups. 

 We gathered thousands of living examples at the Tonga and 

 Viti Islands by digging in clear sand and sandy mud at low 

 water. 



Mr. Reeve gives the station " under stones" where they 

 never occur except when dragged there by hermit crabs. All 

 the Mitres of this type bury themselveSji in sand and only 

 come to the surface during the night. 



Reeve's accurate figure, which represents a Philippine 

 example, is a little larger than our shells and may be con- 

 sidered the typical form. 



The whole surface is covered with small granules formed 

 by the longtitudinal and transverse incised lines. The ribs 

 vary considerably both in size and number, and sometimes 

 are nearly obsolete. The angle on the shoulder is also sub- 

 ject to variation and is occasionally very indistinct. The 



