195 St. Maurice and Ci^aiborne Pklecypoda . 195 



bern on the Neuse River. It certainly has a very Miocenic 

 aspect. 



Solen lisbonensis Aldrich, PI. 59, Fig. 2 



►S". lisbonensis Aid., Geol. Surv. Ala. Bull., No. i, 1886, p. 37, pi. 4, 



fig. 4. 

 S. {Pledosolen) lisbonensis Dal\, Trans. Wag. Ill, 1900, p. 953. 



Aldjndi's original description. — Shell linear, nearly straight ; pos- 

 terior sub-truncate ; anterior obliquely rounded with a depressed space be- 

 hind running to the beaks ; lines of growth prominent, bending at right 

 angles along a line running obliquely from the beaks to the junction of the 

 posterior and ventral margins. Anterior widely gaping. Lisbon, Ala., 

 just above the Buhrstone. 



Especially common in Buhrstone at Ft. Gaines, Ga. * 



To this speci es Dall has added a variety, op. cit. , called 



abruptus, characterized as follows : This form, represented by 



numerous fragments, differs from Aldrich' s figure by its more 



abrupt anterior truncation and relatively wider valves. It will 



probably, when more complete specimens are obtained, prove to 



belong to a distinct species. Locality. — Clark Co., Miss. 



Cultellus (Ensiculus) conradi Cossmann, PI. 59, Fig. 3 



Ensiculus conradi Cossmann, Notes Supl., 1894, p. 5, pl. i, fig. i. 

 Cultellus {E.) conradi Dall, Trans. Wag., Ill, 1900, p. 958. 



Cossmann^ s original description. — Testa depressiuscula, antice abbre- 

 viata ac subovalis, postice elongataet elatior; umbones parvi, baud prominuli; 

 cardo cum dente antico perpendiculari et dente postice sub marginem parall- 

 eli, cicatricula musculi anterioris, angusta, prselonga, atque radiatim impressa. 



Coquille d^primee, court, r^trecie et ovale de cote anterior plus dila- 

 tee et allongee du cote posterieur ; le bord sup^rieur parait rectiligne, les 

 crotchets tres petits et a peine courbes en avant, n'y font aucune saillie. 

 Toute la surface est lisse, avec de faibles stries d'accroissement qui indiquent 

 bien la contour de la coquille complete, sur le seul fragment que je possede. 

 La charniere de la valve droite se compose d'une dent ant^rieure 6troite et 

 saillante, presque perpendiculaire au bord cardinal, tandisque la dent pos- 

 terieure forme un bourrelet parallele au bord. L'impression du muscle 

 adducteur est 6troite et allongde : elle prend naissance centre la callosite 

 du rebord anterieur et s'^tend obliquement vers le cote anal, marqud de 

 petits rayons peu saillants. 



