156 Panama Shells. MURICID^. 



204. Cerithium pulchruiu. Nov. sp. 



Shell rather long, subconio : very dark brownish red, with 

 a yellowish white spiral line on the middle of the whorls : with 

 about forty slender acute ribs on each whorl, which terminate 

 abruptly on the periphery of the last whorl ; with very stout 

 varices 240° distant ; with a narrow acute spiral keel, above the 

 middle of the whorls, traversing the ribs and varices : with a 

 few raised spiral lines and many minute spiral striae, which do 

 not traverse the ribs ; anteriorly with crowded coarse spiral 

 striae : apex acute : spire with the outlines moderately curvi- 

 linear : whorls eleven, convex, with a deep suture ; last whorl 

 short : aperture large, quadrate-orbicular, broadly effuse above, 

 with a very narrow sinus in place of the canal ; labrum and 

 labium continuous, very thick and highly polished. 



Mean divergence about 33° ; length 1.25 inch ; breadth .65 

 inch ; length of spire .82 inch. 



This species must closely resemble G. Afontagnei Orb. But in 

 Kiener's figure and description, Orbigny's species appears to be 

 destitute of varices. Menke, however, in his specimen of C. 

 Montagnei from Mazatlan, finds 48 ribs on the last whorl, but 

 mentions no varices. 



Station. — Half buried in muddy sand under bushes at high 

 water mark. 



Habitat. — Panama ; C. B. A. ! 



125 specimens were collected, near the mangrove thicket, 2 J 

 miles east of Panama. 



205. Cci'ithiiim Recvianiini. Nov. sp. 

 Shell rather long, subconic : dark reddish brown, with a yel- 

 lowish white spiral line on the middle of the whorls, which ia 

 darker between the ribs ; with a similar spiral line anteriorly, 

 and another tipping the upper ends of the ribs on the lower 

 whorls : without varices : on each whorl with about twenty- 

 four prominent subacute, not approximate, ribs, which are lesa 



