4 PROCEEDINGS OF THE NATIONAL. MUSEUM Vol.70 



MELANELLA (MELANELLA) PORTLANDICA, new species 



Plate 1, fig. 6 



Shell of moderate size, regularly elongate-conic, milk white, shin- 

 ing. Nuclear whorls decollated in the type. Postnuclear whorls 

 narrow between the summit and suture with the summit appressed, 

 very slightly rounded, marked at irregular intervals by varicial im- 

 pressions. Suture only very slightly impressed. Periphery of the 

 last whorl slightly inflated, strongly rounded. Base very short, 

 strongly rounded. Aperture small, pyriform, oblique; posterior 

 angle acute ; peristome very much thickened ; columella short, almost 

 straight, decidedly thickened and reflected over the umbilical area 

 as a thick callus ; parietal wall covered by a thick callus. 



The type. Cat. No. 362492, U.S.N.M., was donated by Mrs. I. S. 

 Oldroyd and was collected at Portland, Oregon. It has 11.3 whorls 

 and measures, length, 9.1 mm. ; diameter, 3.1 mm. 



The short thickened aperture and short base will at once distin- 

 guish this from Melanella micayis. There is a suggestion of Mela- 

 nella {Balds) thersites but its straight form and general proportions 

 differentiates it from that species. 



ACLIS CALIFORNICA, new species 



Plate 1, fig. 2 



Shell small, pupiform, thin, bluish white. Nuclear whorls not dif- 

 ferentiated from the postnuclear turns. All the whorls well rounded, 

 appressed at the summit which is finely crenulated, the rest marked 

 by fine lines of growth which are somewhat retractively slanting. 

 The type is slightly worn and shows no indication of spiral sculpture. 

 Sutures moderately constricted. Periphery of the last whorl inflated 

 and strongly rounded. Base short, strongly rounded narrowly um- 

 bilicated, marked like the spire. Aperture subquadrate; posterior 

 angle decidedly obtuse; outer iip thin; columella almost straight, 

 reflected over and appressed to the base for its posterior fifth ; parietal 

 wall covered with a thin callus. 



The type, Cat. No. 362455, U.S.N.M., was collected by Dr. R. H. 

 Tremper on rocks at San Clemente Island. It has six whorls and 

 measures, length 5 mm., diameter, 2.1 mm. 



TURBONILLA (PTYCHEULIMELLA) MAGDALINENSIS, new species 



Plate 1, fig. 7 



Shell elongate conic, bluish white. Nuclear whorls decollated in 

 all our specimens. Postnuclear whorls very narrowly shouldered at 

 the summit, flattened, somewhat contracted near the suture, marked 

 by incremental lines and occasional indications of obsolete protrac- 



