PLicACEA. MOLLUSCA. tornatella. 245 



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

 are given 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 h, and where others have arranged it, until its animal is fully- 

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

 belong to the genus Coriocella. 



Family PLICACEA, Lam. 



Jlperture not spreading ; pillar plaited. 



Genus TORNATELLA, Lam. 



Shell oval, spirally grooved, lohorls few ; aperture long, narrow, 

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

 fold. 



Tornate'lla puncto-striata. 



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

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

 suture deep ; fold of columella distinct. 



Figure 188. 

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



Tornatella puncto-striata, Adams ; Bost. Journ. A'^at. 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 die 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 

 -j-'^ inch, breadth /^ inch, divergence 60^. 



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

 ford harbour. 



