THE NAUTILUS. 87 



The entire absence of dotted revolving lines and the constant 

 orange color are characteristic features. 



Dimensions : height 60, diameter 32 mm.; of others 59x32, 58x31, 

 56x31, 50x32, and 50x27. 



The illustration in Tryon's Manual, Vol. VI, plate 15, fig. 96, id 

 a good representation ; but the list of synonyms should probably be 

 either placed under C. magus Linn, or recognized as veritable species. 



A NEW SPECIES OF BULIMULUS FROM COSTA RICA AND A NEW 

 SPIRACULUM FROM ASSAM. 



BY HUGH FULTON. 



Bulimults (Drymaeus) inusitatus, n. sp. 



Shell sinistral, elongate, narrowly perforate, thin, translucent, am- 

 ber yellow throughout; whorls 7^, engraved with faint spiral lines; 

 nucleus with minute close-set crossed stria?; aperture ovate; peri- 

 stome thin, lower portion slightly expanded ; columella reflexed at 

 point of insertion nearly covering the umbilicus. 



Alt. 29^, diam. maj. 13, length of aperture 12^ mill. Hab.: Costa 

 Rica (Underwood). 



Compared with tropicalis Morelet, the only other known reversed 

 Drymieus. The present species is thinner, has half a whorl more and 

 is easily separated by its different ground color and the absence of 

 bands. 

 Spiraculum assamense n. sp. 



Shell discoidal, flat above, very broadly umbilicated, dark brown 

 with a few oblique stripes of a lighter color, encircled by four rows 

 of hairs arranged in tufts, one being at the periphery, one above, and 

 two below, the latter two are often worn off" in older specimens ; 

 whorls 4^, slightly convex above, last rounded ; tube erect, short, in- 

 clined towards the apex, situated 2 mm. from the margin of the aper- 

 ture ; peristome white, somewhat thickened, bordered by a narrow 

 flange; aperture oblique, circular; operculum shelly, whorls 5. 



Diam. maj. 14 mm., min. 12 mm., alt. 5 mm. 



llab.: Khasi Hills, Assam. 



In most respects this species is very like nagaensis Axst. 4' Bed<l.< 

 but can be easily separated by the position of the breathing tube, 



