PLicACEA. MOLLUSCA. tornatella. 245 



no one has any acquaintance except its author, and no characters 

 are o-iven of its shell except that it is exterior and bulla-form. It seems 

 better, therefore, to leave it where the conformation of the shell would 

 place it, and where otheTs have arranged it, until its animal is fully- 

 known, and its place determined. It will most probably be found to 

 belong to the genus Coeiocella. 



Family PLIcAcEJl, Lam. 



Jiperture not spi-eading ; pillar plaited. 



Genus TORNATELLA, Lam. 



Shell ovalj spirally grooved, ichorls few ; aperture long, narrow, 

 rounded before ; outer lip thin, inner lip spirally twisted to form a 

 fold. 



Tornate'lla puncto-stria'ta. 



Shell minute, white, sub-oval ; whorls four or five, the lowest one 

 large, the lower half marked with revolving, punctured lines ; 

 suture deep ; fold of columella distinct. 



Figure 188. 

 State Coll., No. 31. Soc. Cab., No. 2367. 



Toroatella puncto-striata, Adams ; Bost. Journ. JYat. Hist., iii. 323, pi. 3, f, 9. 



Shell minute, white, elongated-oval, inclining to ovate ; whorls 

 four, perhaps five, the lowest one at least three fourths the length 

 of the shell, distended, the portion above the aperture plain and 

 smooth, the remainder marked with ten to fifteen deep, rather 

 distant revolving lines, which are indented with minute punctures ; 

 the other whorls form a short, rapidly diminishing spire, and each 

 of them is flattened so as to form a shoulder at the suture, which 

 is deep and somewhat channelled. Aperture narrow, two thirds 

 the length of the lower whorl, widening downwards ; outer lip 

 sharp and simple, regularly curved, not very broadly rounded at 

 base ; pillar thickened, exhibiting a prominent fold ; umbilical 

 region depressed, and in immature specimens it is open. Length 

 ■^\ inch, breadth /„• inch, divergence 60^. 



Found by Professor Adams in mud dredged up from New Bed- 

 ford harbour. 



