18/2.] MR. A. GARRETT ON POLYNESIAN MITR1D.E. 841 



21. MlTRA MULTICOSTATA, Swa'lUS. 



This pretty species only occuned at Rarotonga, where we obtained 

 it on the reefs. 



22. Mitra coronata, Chem. 



A rare species, of which a single dead example was picked up on 

 the beach. We also obtained it at the Sandwich, Kingsmill, Viti- 

 and Samoa Islands. 



23. Mitra micans, Rve. 



Only a single, but perfect specimen was found on the reefs. We 

 never noticed it at any other locality. 



24. Mitra crocata, Lam. 



Besides Rarotonga, we can mention the Samoa and Viti Islands as 

 localities for this rare Mitra. Found in a dead condition on reefs. 



25. Mitra amabilis, Rve. 



Somewhat rare, and ranges from the Paumotu to the Viti Islands. 

 On reefs. 



26. Mitra cucumerina, Lam. 



A common species at most of the South-Sea islands, and found 

 on reefs. 



The animal is diluted white, dotted with creamy yellow. 



27. Mitra consanguinea, Rve. 



A rare species, of which several dead examples were gathered on 

 the reefs. It is equally rare at the Samoa and Viti Islands. 



28. Mitra aurora, Dohrn. 



If we have rightly determined this fine Mitra, we can add to the 

 localities Rarotonga and the Paumotu Islands. Dohrn's examples 

 were obtained at the Sandwich Islands. 



29. Mitra assimilis, n. sp. 



Shell oblong, subfusiform, turreted, solid, shining, whitish, with 

 closely set transverse deep-brown slightly raised lines ; spire mode- 

 rately elevated, acute ; whorls 8-9, plano-convex, shouldered above, 

 longitudinally ribbed, ribs closely set, angular, slightly nodulous, 

 16 to 18 in number ; body -whorl convexly rounded, contracted and 

 granulated at the base ; aperture narrow, bluish white and ly'rate 

 within ; outer lip rather sharp and crenulate ; columella with four 

 folds. 



Length 16 mill., diam. 8 mill. 



Hab. Rarotonga, Samoa, and Viti Islands {coll. Garrett). 



A very rare species, found under stones on reefs. It belongs to 

 the same group as M. concinna, crocata, and fiavescens. 



