840 MR. A. GARRETT ON POLYNESIAN MITRID^E. [Nov. 19, 



10. Mitra abbatis, Chem. 



Only a few dead examples of this rare Mitra were found at 

 Tahiti and at Rarotonga. 



1 1 . Mitra testacea, Swains. 



This is also a rare Polynesian Mitra, and only occurred in a dead 

 condition at Tahiti, Rarotonga, Paumotu, and the Kingsmill Islands. 



12. Mitra columbell^eformis, Kien. 



This fine species occurs under stones on reefs, and was found at 

 the Paumotu, Tahiti, Cook's, and Kingsmill Islands. 



13. Mitra dermestina, Lam. 



Is found at all the Polynesian islands, though not by any means 

 common. It is met with under stones on reefs. 



14. Mitra speciosa, Rve. 



This beautiful species is very rarely found. All we obtained were 

 from Rarotonga, Paumotu, and Swain's Island, and were in a dead 

 condition. 



15. Mitra literata, Lam. 



A common species at all the Polynesian islands, and occurs on 

 rocky ground in the upper region of the littoral zone. 



16. Mitra acuminata, Swains. 



Under stones on reefs. Ranges all through the South Seas, but 

 only abundant at the Paumotu and Kingsmill groups. 

 The animal is uniform pale yellow. 



17. Mitra maculosa, Rve. 



We obtained a few examples of this species at most of the South- 

 Sea islands. They were found on reefs. Our finest specimens are 

 from Cook's group. 



The animal is deep chocolate-brown, the creeping-disk, tentacles, 

 and siphon clear white. 



18. Mitra nodosa, Swains. 



Common to all the Polynesian islands, but by no means abundant. 

 On reefs. Our finest specimens are from Rarotonga. The coloured 

 variety figured by Reeve was not met with by us at any of the South- 

 Sea groups. 



19. Mitra tuberosa, Rve. 



Occurs at all the South-Sea islands, but only found abundantly at 

 the Viti and Cook's Islands. On reefs. 



20. Mitra brumalis, Rve. 



This has the same range as the preceding, but is more rare. On 

 reefs. 



The animal is uniform pale yellow. 



