THE NAUTILUS. 



tuberculata (Mull.), a widely distributed Oriental form, much more 

 strongly sculptured, with more convex whorls. 



M. boninensis Lea has been found to grow much larger than the 

 original examples, reaching a length of 32.5 mm. 



Melania libertina var. gigas n. v. 



Very large, finely striate spirally, more coarsely so at the base, but 

 without longitudinal folds. Olivaceous-brown, yellow in places, with 

 some darker-brown streaks ; the color concealed by a black ferrous 

 coat. Length of decollate shells with about 4 to 4^ whorls remain- 

 ing, 48 to 51, diam. '20 mm., length of aperture 21 to 22 mm. 



Arato, Echizen. Types no. 86441 A. N. S. P., from no. 171 of 

 Mr. Hirase's collection. 



This is the largest Japanese Melanian now on record. Some spe- 

 cimens of M. lobbeckiana are longer, but they are not so stout in 

 figure. 



A SINGULAR EOCENE TURBINELLA. 



BY WILLIAM I1EALEY DALL. 



A singular TurbincUa has recently been received from Mr. S. W. 

 McCallie, of Georgia, which seems to stand, to some extent, between 

 the two well known types, Turbinella proper and Vasum. 



Psilocochlis subg. nov. 



Shell thick and heavy, with depressed dome-like spire and few 

 whorls, a strong siphonal fasciole surrounding a wide umbilical fun- 

 nel, which is completely filled by a heavy deposit of callus, which 

 also extends to the posterior angle of the aperture; the pillar exhib- 

 its three strong elevated plaits, and the surface is smooth orfreefrom 

 ribs, nodules, or prominent sculpture of any kind. Type: 



Turbinella (Psilocochlis) McCallie sp. nov. 



Shell short and broad, with about four whorls, of which all but the 

 last are very small ; apex hardly rising above the last whorl, which 

 is dome-shaped above and widest at about the level of the posterior 

 angle of the aperture, diminishing forward and slightly constricted 

 behind the strong and flaring siphonal fasciole ; umbilical funnel 

 smooth, but nearly filled with a smooth appressed mass of callus, con- 



