300 AMERICAN JOURNAL 



Ohservations. — This species appears to be most nearly allied 

 to M. perinngnis, Hinds, of Tahiti, from which it differs prin- 

 cipally in the whorls being more convex, the plico3 more dis- 

 tant and prominent. 



3. Melania Peasei, Tryon. — t. 20, fig. 5. 



Description. — Shell elevated, spire decorticated, with 3 whorls 

 remaining, suture very slightly impressed ; whorls flattened, 

 slightly increasing, covered with faint revolving striae ; aper- 

 ture oval, well rounded below. Very dark chocolate-brown, 

 with an infra-medial yellowish band, dark red within. 



Dimensions. — Height (truncate) 23, diam. 9 mill. 



Habitat. — Fiji Isles, (Smithsonian Institution.) 



My Cabinet. Smithsonion Collection, Washington, D. C. 



Ohservations. — I have twice received this species, with printed 

 label attached, from the Smithsonian Institution, the name be- 

 ing determined by comparison with his types by the late Hugh 

 Cuming, of London. It was first sent as perpinguis, Hinds, 

 along with genuine examples of that species, from which it 

 differs greatly ; and afterwards as M. rudens, described by Mr. 

 Eeeve without locality, but inhabiting, as we have ascertained, 

 Oregon. 



4. Hemisinus Pazi, Tryon.— t. 20, fig. 6. 



Description. — Clavate, smooth, thick; spire conical, apex 

 obtuse, suture slightly impressed ; whorls 3 (remaining), flat- 

 tened above, rapidly increasing, the last subangulate, and 

 more convex below the periphery; aperture large, very slightly 

 produced at base, labrum thickened, broadly appressed. Pol- 

 ished horn-color; with irregular transverse short lines of red- 

 brown, whitish within. 



Dimensions. — Length 20, diam. 13 mill. 



Hahitat. — Quito, (Sr. Patricio Ma. Paz.) 



My Cabinet. Cabinet of Sr. Paz. 



Olservations. — This species is not nearly allied to any pre- 

 viously described. Together with the following and H. Bin- 

 neyi, published by me in the Journal of Conchology for 1865, 

 it appears to form a peculiar group, readily distinguished from 

 the well-known species of Brazil and the Orinocco Kiver. 



