66 THE NAUTILUS. 
and placed nearer the centre; the posterior end is broadly rounded 
in the variety, while in the typical form it is much produced and 
somewhat ram-shaped ; the color varies from light yellowish horn to 
rather dark horn, with an occasional zone of vellowish; the surface 
is smooth and polished, the growth lines being faint on the umbones, 
but stronger on the ventral border. 
Length 14.00, height 11.00, breadth 8.50 mill. 
Length 12.50, height 9.75, breadth 7.50 mill. 
Habitat.—Lilycash Creek, near Joliet (coll. by J. H. Handwerk). 
This variety was referred to Dr. V.Sterki by Mr. Handwerk, and 
considered by him to be an unusal form of striatinum, but he did 
not consider it distinct from the typical form. After examining a 
large nuinber of specimens the writer has concluded that it is a form 
distinct enough for a specific name. Its beautiful polished surface 
and inflated shell will at once distinguish it from striatinum. It is 
shaped differently from stamineum and the beak sculpture is very 
much finer. 
Another form is found associated with the variety which is in a 
sense intermediate between the typical form and the variety, having 
a more oval shell than the type, but not being so much inflated as 
the variety ; it is very dark chestnut or dark brown in color. Sev- 
eral specimens of this form had the hinge wholly or partly inverse. 
DESCRIPTION OF A NEW SPECIES OF OLIVELLA. 
BY JOHN FORD. 
Olivella Blanesi n. sp. 
Shell ovate, white, somewhat translucent, ornamented with three 
spiral series of irregularly formed crimson spots, one (of very small 
spots) at the suture, the others central and basal; the rest of the 
surface showing a faint reticulation of the same color in some speci- 
mens. Whorls 5, spire produced, rather acute; suture chanelled. 
Aperture half the length of the shell, acuminate above, widest below 
the;middle; basal notch wide, columella very short, vertical, cylin- 
drical and smooth, making a decided angle with the parietal wall, 
forming a deep sinus; basal fasciole smooth. 
Length 8.9, diam. 3.8, length of aperture 4.75 mm. 
Length 7.5, diam. 3.2, length of aperture 4 mm. 
Locality —Cardenas, Cuba. 
