326 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 53. 



MELANELLA (BALCIS) MACRA, new species. 



Plate 41, fig. 6. 



Shell of medium size, slender, with a double flexure. When viewed 

 with the aperture to the front, it shows the early whorls bent back- 

 ward and the succeeding turns flexed to the right. Shell bluish- 

 white, except where the dried animal shines through its substance; 

 there it has a granular light brown to buff appearance. First four 

 whorls well rounded, with well-impressed suture, the remainder al- 

 most flattened, marked by exceedingly fine lines of growth only, and 

 separated by a scarcely visible suture. The posterior limit of the 

 inside of the whorls shmes through the substance of the shell and 

 appears as a conspicuous false suture. Periphery of the last whorl 

 weakly angulated. Base somewhat prolonged, well rounded. Aper- 

 ture long, ovate; posterior angle acute; outer lip considerably pro- 

 tracted, particularly so at the periphery; inner hp stout, curved, 

 reflected over and appressed to the base; parietal wall covered by a 

 thick caUus. 



The type and three specimens of this species (Cat. No. 207772, 

 U.S.N.M.) were collected by Rev. G. W. Taylor at Departure Bay, 

 British Columbia. The type has 13 whorls and measures — length, 

 7.5 mm.; diameter, 1.9 mm. 



The present species is very similar to Melanella columhiana, but 

 uniformly smaller and much more slender. 



The following additional specimens have been examined: 



MELANELLA (BALCIS) BERRYI, new species. 



Plate 42, fig. 3. 



Shell elongate-conic, with a double flexure ; the first bend when the 

 specimen is viewed with the aperture to the front, is to the right, and 

 the second flexure is backward. The clean shell is bluish-white, but 

 when the animal has been allowed to dry in it, it appears brown. The 

 first two turns well rounded, separated by a constricted suture, the 

 remainder flattened, marked by exceedingly fine lines of growth and 

 very fine microscopic spiral striations. Sutures scarcely perceptible. 

 The posterior limit of the inside of the whorls appears through the 



