OF CONCHOLOGY 211 



Observations. — But two specimens of this shell are known to 

 me. It belongs to a small group of species represented by the 

 well-known decollata, Lam., ferrea, Reeve, corporosa, Gld., Si- 

 nensis, Reeve, etc. It may be readily distinguished from all 

 of these by its much more brilliant coloring. 



3. M. UNICOLOR, Tryon.— t. 22, i. 2. 



Description. — Shell thin, narrow, subcylindrical, or pnp£e- 

 form, truncate; volutions (three remaining) very slightly con- 

 vex, and increasing but little in diameter; sutures well im- 

 pressed; surface thickly covered with narrow, deeply engraved 

 spiral strias, visible on the interior of the aperture; second 

 and third whorls closely longitudinally ribbed; aperture nar- 

 row, ovate, slightly oblique, rounded below; outer lip flattened 

 in the middle, perpendicular; color very light brown, or tea- 

 color, not shining. 



Dimensions. — Length 17 millimetres, width 6 mill.; length 

 of aperture 6 mill., breadth 4 mill. 



Habitat. — Tahiti. W. H. Pease, Honolulu, S. I. 



My Cabinet. Cabinet of Academy of Nat. Sciences, Cabi- 

 nets of Wm. Harper Pease, Chas. M. Wheatley, Isaac Lea, 

 and John G. Anthony. 



Observations. — Some time since, Mr. Lea handed to me a 

 number of species of Tahitian Melanise, which he had received 

 from Mr. Pease, requesting me to describe any that proved to 

 be new. Among them I found several small specimens of this 

 species, and fearing that they might not be full grown speci- 

 mens, I wrote to Mr. Pease for further information. He 

 promptly sent to me a number of well-grown shells, and wrote 

 that he had several thousand specimens, all presenting great 

 uniformity of size, color and sculpture. I, therefore, no longer 

 hesitate in describing it as a new species. 



It does not resemble any other Tahitian Melanise. The fol- 

 lowing additional species were sent to me, from the same lo- 

 cality, by Mr. Pease: — 



M. gracillima, Gld., mcisa, Rve., corporosa, Gld., Plutonis, 

 Hinds, lancea, Laa, scopulus, Reeve. 



■i. M. MILLEPUNCTATA, Tryon. — t. 22, f. 3. 



Description. — Shell rather thin, short, ovate-conical, apex 

 obtuse, eroded; whorls four, rapidly increasing in diameter, 

 the last globosely inflated. Surface covered with raised, 

 rounded, spiral stride, intersected on all but the last whorl by 

 longitudinal ribs. Suture well impressed. Aperture rather 

 small, oval, outer lip somewhat curved forwards, turning 



