OF CONCHOLOGY, 265 



is no recent American shell that approaches the B. imrilis. 

 The genus is readily distinguished from Fusus by its compara- 

 tively short canal, and from Neptimea by its longer beak and the 

 sudden contraction of the aperture where it joins the canal. Per- 

 haps Buccinum Balteatum and B. fusoides, Reeve, may be spe- 

 cies of this genus. F. Berniciensis, King, can more confidently 

 be referred to it. 



SYCOTYPUS, Browne, Gill. 



S. PYRIFOKMIS. — PI. 20, fig. 1. 



Description. — Pyriform, rather thin in substance ; volutions 

 6^ ; spire prominent, exserted, not elevated ; angles of whorls 

 rather below the middle, tuberculated, the tubercles gradually 

 becoming obsolete on the back of the penultimate volution ; 

 summits of volutions oblique, slightly concave ; a carinated ridge 

 borders the sutural margin of the three larger volutions, and 

 between these and the apex the canal is obsolete ; body whorl 

 ventricose, slightly rounded towards the angle which is not car- 

 inated ; surface marked with numerous filiform, rugose, revolv- 

 ing lines, between which are usually three minute lines, the 

 middle one being most prominent ; aperture wide ; columella 

 flattened about the fold. 



Locality. — Natural Well, Dauphin Co., N. Car. 



Observation. — This species is nearly allied to S. pyrum, but 

 can be distinguished by its more prominent and distinctly tu- 

 berculated spire and by the spiral lines being filiform and ru- 

 gose. The aperture is not so long in proportion as it is in *S'. 

 jyynim. 



BUSYCON, Bolten. 



B. Tritonis, Conrad.— pi. 20, fig. 2. 



This species is figured for comparison with B. maximum 

 in the Miocene Fossils of the U. S., pi. 47. It is much 

 more ventricose than that species and has very prominent 

 spines, whilst the maximus is without spines, except in young 

 shells, and they are always distant and rudimentary. A 

 comparison of several specimens of each species shows marked 

 differences. 



B. Tritonis, Con. Proceed. Acad. Nat. Science, 1862, p. 

 583. 



B. CAKINATUM. — PI. 19, fig. 2. 



Proceed. Acad. Nat Science, 1832, p. 286. 



