140 THE NAUTILUS. 



Length 28.50 mm., greatest breadth 20 mm. 



Hab.: Celebes (?). 



A striking shell, whose nearest ally is perhaps Cypraea tardus Lk. 

 From this, however, it may be easily distinguished by the remark- 

 able white flecking on the dorsal surface, by the finer and more 

 numerous teeth on the columella and the narrower and straighter 

 aperture ; moreover, it is much flatter than is the case with Cypraea 

 turdus. 

 Calliostoma carnicolor n. sp. PI. VIII, figs. 6, 7. 



Shell conical, keeled, imperforate, somewhat glossy, flesh-colored ; 

 spire concave ; whorls 8-9, the last three rapidly increasing and 

 much flattened, sculptured with nodulous spiral ridges, almost every 

 alternate nodule being of a rich chestnut-brown ; sutures not well 

 defined above, and only slightly impressed between the last whorls ; 

 base very inflated and sculptured with closely-set spiral ridges inter- 

 cepted by lines of growth, thus presenting a coarsely, granular 

 appearance ; columella arched, reflexed outwards, forming a thick 

 callosity over the umbilical area, a slight callosity extending upwards 

 to the lips above ; peristome simple ; aperture subquadrate ; interior 

 of shell nacreous and irridescent. 



Alt. 41 mm., diam. maj. 53 mm. 



Aperture, alt. 25 mm., diam. maj. 25 mm. 



Hab. : Celebes (?). 



The above shell at first sight much resembles Calliostoma cun- 

 ninghami Gray, from New Zealand ; the spire is, however, more 

 concave, the last whorls are much more flattened and expanded out- 

 wards, and the nodulous spiral ridges are far less numerous than is 

 the case with that species ; moreover, the inflation of the base easily 

 separates it from C. cunninghami. 



DESCRIPTION OF A NEW BIFID AEIA (B. AONA). 



BY H. A. PILSBRY AND E. G. VANATTA. 



When working on Bifidaria pentodon some time ago we found one 

 specimen of a species evidently distinct though related to that, from 

 " Silver Lake, Kansas," collected by Mr. J. B. Quintard. Recently 

 a few more examples of the same form were found in river debris 



