December, 1S43.] 327 



abruptly rounded at base; beak short, subperforate, tortuous ; aperture with the 

 channel rather less than half the length of the shell ; labrum with eight short 

 dentiform prominent strice within. Length, one inch and a quarter. 



Locality. Petersburg, Virginia. Mr. Tuomey. 



Closely resembles Fusus cinereus, Say, but the whorls are more scalariform, 

 and the body whorl much shorter and more abrupt at base ; the beak narrower 

 and more tortuous. 



Terebra. 



Terebra curvilirata. Subulate, whorls with a revolving impressed line be- 

 low and near the suture; beneath this line the whorls are convex; ribs longi- 

 tudinal, curved, acute, dislocated by the impressed line ; revolving lines minute, 

 crowded, obsolete ; columella sinuous. Length, one and a quarter inches. 



Locality. St. Mary's river, Maryland. 



Differs from Cerithium dislocatum, Say, in wanting the distinct revolving 

 lines, and the small dislocated portion of the ribs are not of a tubercular form ; 

 the aperture is longer and narrower. 



POLYPARIA. 



TtTRBINOtlA. 



Ttjrbiuolia pileolus. Obtusely obconical, slightly compressed, periphery 

 with an oval outline ; lamellce smooth, of equal thickness, united to an elliptical 

 centre; between each plate is one, sometimes two, short irregular lamellae, 

 either free or united to the base of the larger rays. Length, nearly half inch, 

 diameter, half inch. 



Locality. Pamunkey River, Kent Co., Virg. Mr. Tuomey. 



ECHINODERMATA. 



Spatahgus. 



Spatangus orthonotus. Ovate, convex-depressed ; truncated at each end, 

 more elevated anteriorly than posteriorly ; dorsal line of the suture a little ele- 

 vated, and curved gradually to the mouth on the anterior half; on the posterior, 

 straight to the margin and parallel to the base ; canal very wide and slightly 

 impressed on the back, margined by an obtuse carinated line and slight furrow ; 

 on the periphery the canal is deep and angular; ambulacra rapidly expanding 

 from the extremities towards the dorsal suture ; pores disunited ; in the middle 

 of the back a slight furrow crosses obliquely each of the anterior ambulacra at 

 its termination ; base plano-convex; anus large and remote from the margin; 

 granulations on the back minute and very closely arranged, in the canal much 

 larger and unequal in size ; base with large tubercles, becoming gradually 

 smaller and more closely arranged towards the margins. Length, two inches 

 and three-eighths ; diameter, two inches and an eighth ; height, one inch and 

 an eighth. 



Locality. Near Coggins' Point, James River, Virginia. Mr. Tuomey. 



