GARRETT: ON POLYNESIAN MITRID^. 29 



58. Mitra testacea Swainson. Reeve, 1. c, pi. xiv., fig. 98. 



A very rare species found in the condition of dead shells, 

 on reefs, at the Kingsmill, Cook's, Society, and Panmotu 

 Islands. 



Varies considerably in the size of adults, and some 

 examples have the spiral impressed lines so deeply cut that 

 the suface appears to be corded with convex ribs. 



59. Mitra tessellata Martyn. Reeve, 1. c, pi. ii., fig. 10. 



This fine large Mitra appears to be a scarce shell. A 

 few examples were obtained on reefs at the Kingsmill, 

 Society and Panmotu Islands. I also found two fine speci- 

 mens at Guam. 



Our largest example is 92 mill, in length, he same as 

 Reeve's very accurate figure. 



Animal creamy-yellow. The small triangular foot is 

 reddish-brown above, and the siphon is varied with a lighter 

 shade of the same color. The eyes are situated on the 

 middle of the small tentacles. 



60. Mitra texturata Lamarck. Reeve, 1. c, pi. xx., fig. 155. 



Four dead, but very perfect examples were collected on 

 the fringing reefs, Viti Islands. Dr. Graeffe obtained specimens 

 at Samoa. 



Viti shells are more robust and have a shorter spire 

 than represented by Reeve's figure. 



61. Mitra tuberosa Reeve, 1. c, pi. xxx., fig. 237^', 237/;. 



Excepting the Marquesas, we found this species gener- 

 ally diffused throughout Polynesia ; but appears to be rare 

 everywhere except the Viti Islands, where they occurred in 

 considerable numbers in crevices on the fringing reefs. 



Our examples which are larger than Reeve's figure, 

 which is slightly magnified, are whitish under a luteous 

 epidermis, the base and the transverse band blackish 

 brown. 



