192 



ad apicem obtusa ; anfr. 7,convexiusculis, superne con-tabulatis ; 

 apertura elongato-ovata ; labro simplici, ad columellam vix re- 

 flexo. Long, y^jj, lat. y^ poll. Hcib. Society and Sandwich 

 Islands. 



A delicate, slender shell, varying a good deal in size, and 

 closely allied to, if not the same as B. clavula^ Qiioy, B. bacteri- 

 onides, D'Orb., and B. octonoides, Adanns, from the West Indies. 

 Perhaps it is a species attached to the plantain, cocoa-nut, or some 

 other tropical plant. 



Mr. Bouve exhibited an Echinus from the Millstone Grit 

 of Georgia, which he considered a new species of the genus 

 Pygorhynchus of Agassiz ; and of which he gave a descrip- 

 tion. 



Pygorynchus Gouldii. Bouve. Above, conico-convex, a 

 little more sloping posteriorly than anteriorly. Margin somewhat 

 rounded, except, near and under the anus, where by an excava- 

 tion or depression, it becomes acute. Inferior surface sub-circu- 

 lar. Mouth situated about one third of longitudinal diameter 

 from the anterior margin. Apex sub-central, a little anterior, 

 but not so much so as the mouth. Ambulacra radiating at une- 

 qual angles, the interambulacral spaces dividing the three ante- 

 rior from the two posterior, being wider than the rest. The 

 pores of each diverge considerably from the apex, becoming 

 quite dilated a short distance from it, then converge as they de- 

 scend, until about two-thirds the distance from the summit to the 

 margin, where they are very limited in width, and where the 

 double rows become single. On the margin they again slightly 

 dilate, and are readily traceable to their termination about the 

 mouth, where they are prominent. The anterior ambulacrum is 

 much narrower than the rest. Anus transverse, and situated at 

 about one-fifth the distance from the posterior margin to the apex. 

 Whole length, as shown by three individuals examined, 1|- inches, 

 greatest width l-^- inches, height 1 inch. Locality, Baker Coun- 

 ty, Georgia. Description of characters from specimens in Cabi- 

 net of the Society. 



I take great pleasure in naming this beautiful species after my 

 respected friend. Dr. Augustus A. Gould. 



