37 



March 19, 1845. 

 Charles T. Jackson, Vice President, in the Chair. 



Dr. A. A. Gould read descriptions of shells collected by 

 Dr. Charles J. Bates, Assistant Surgeon U. S. Navy, on the 

 coast of Liberia. 



Pholas branchiata. Testa oviformi, clausa, postice acumi- 

 nata, areolis tribus triangiilaribus partita : areola antica plicis 

 numerosis conceritricis serratis : mediali transverse subtiliter stri- 

 ata : postica lamellis corneis flexilibus imbricatis instrucla : dorso 

 scutis tribus obtecto, unico magno umbonali, orbiculari ; duobus 

 marginalibus lanceolatis, duobus quoque ventralibus ; apophysi 

 exili, flexuoso-falciformi. Long. 1^ ; lat. ^^- ; poll. 



PsAMMOBiA FiGLiNA. T. crassa, sub-ovali, sub-equilaterali, 

 rufo-cinerea ; antice rotundata ; postice hiante, sub-rostrata, 

 valde flexuosa, apice emarginata ; valvis concentrice laminoso- 

 striatis, radiatim lineolatis ; natibus elevatis, attigentibus ; denti- 

 bus cardinalibus divaricatis ; intus alba, punctis numerosis inden- 

 tata. Long. 3-i- ; alt. 2} ; lat. If poll. 



Tellina rubicunda. T. tenui, transversa, inequivalvi, natibus 

 postmedianis, antice semi-elliptica, postice triangular!, flexuosa, 

 apice truncata, concentrice et radiatim minutissime striata ; valva 

 dextra pianulata, postice areolam triangularem lamellosam haben- 

 te ; valva sinistra convexa ; colore dilute rosacea, albo radiata. 

 Long. 1 ; alt. f ; lat. ^ poll. 



Resembles T. donacina in shape and coloring, but is larger, 

 and is also distinguished by the triangular area of coarser sculpture 

 on the right valve. 



NucuLA BicuspiDATA. T. alba, transverse elongato-ovata, sub- 

 cylindrica, antice rotundata et triplicata, postice producta, tri- 

 carinata, bicuspidata ; valvis oblique concinne striatis, prceter spatio 

 excavate inter carinas serratas ; cardine dcntibus anticis ad 12, 

 posticis ad 26. Long. | ; alt. J poll. 



Nassa turbinea. Testa solida, ovata, apice producta, albida ; 

 anfr. 9 sub-tabulatis, plicis numerosis acutis et striis volventibus 

 profundis ad 13 decussatis ; basi spiraliter striata ; apertura parva, 

 stricta, angulato-ovali ; labio acuto, crcnulato, intus sulcato ; callo 

 columellari erecto, granulate. Long, -j^ ; lat. ^ poll. 



