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 yellowish ; 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 au uuusal form of striatinum, but he did 

 not consider it distinct from the typical form. After examining a 

 large number 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 fascicle 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. 



