1917. 



NATURAL SCIENCES OF PHILADELPHIA. 



311 



E.. infiexa Pse., from the Paumotus, is similar in sha]: but far 

 larger. 



A form from Kahala, Oahu (right fig.), collected by ]\_-s. A. F. 

 Letson, differs by being a little more conic, the last whorl mce ample 

 in the peripheral region. Leng^th 4, diam. 1.7 mm. 



Melanella ima n. sp. Fig. 4. 



Pamnalu, Oahu, W. A. and E. L. Bryan. Type No. 11592, A. 

 N. S. P., paratypes in Bi\van coll. 



The shell is small, slender, the upper half curving strongl to the 

 right; smooth, whitish, the linear suture rather narrowly brdered 

 with gray. The whorls are very slightly convex. The sries of 

 linear varices on the right side recedes to the dorsal side above. 



A 



Fig. 4. — Melanella ima. 



The aperture is shaped as in M. kanaka, and as in that specie the 

 outer lip arches forward strongly. 



Length 4.3, diam. 1.35, length of aperture 1.05 mm. 



More slender than M. kanaka, and curved for a greater prt of 

 its length. The shape of the last whorl distinguishes it froi .1/. 

 mimus. 

 Melanella letsonae n. sp. Fig. 5. 



Mokapu Point, Oahu. Type No. 117633, A. N. S. P., collet ed 

 by Mrs. A. F. Letson. Also in Bryan collection. 



The shell is very slender, white, moderately curved to the ight, 

 somewhat solid. There is a row of varix-lines on the right ide, 

 becoming dorsal in the upper part of the spire. The whorl^a^e 

 nearly flat, the suture superficial having a broad gray border b(ow. 

 Last whorl is obtusely subangular above the middle, the base tapeing, 



