348 . Mighels' Descriptions of 



any more than four specimens, all of which are in my collec- 

 tion. No two of the specimens are exactly alike ; but not- 

 withstanding this, and the remarkable difference between 

 those represented in the plate, 1 doubt not they are specifically 

 the same. 



It is allied to L, decoUaia, Nob. but it is readily distinguish- 

 ed from that shell by its amplitude, by a proportionately 

 larger penultimate whorl, by the reflected labrum, by a much 

 broader labium, and by the open umbilicus, which is always 

 entirely closed in L. decollata. 



I regard that represented by fig. a, as the prevailing type 

 of the species. Fig. 5 is a little shorter, and rather more 

 tumid ; fig. c, represents a distorted specimen. 



Phasianella sulcosa. 



P. testA minuta, ovato-conica, Isevi; anfractibus quatuor, subconvexis, 

 transversim sulcatis ; sutura impressa ; apertura ovato-oblonga, intus trans- 

 versim fasciata. 



Plate XVI. Fig. 4. 



Shell very small, ovate-conical, smooth and white ; whorls 

 four, slightly convex, with six or seven transverse grooves on 

 the body whorl, and three on each of the two next above ; 

 spire smooth and pointed ; aperture ovate-oblong, with three, 

 slightly apparent transverse bands within, as seen under a 

 strong magnifying power. 



Length ^l inch, breadth about gg inch. 



Habitat. Casco Bay. 



Remarks. Examined with the unassisted eye, this shell 

 would be likely to be mistaken for some species of Cingula, 

 but its true character is revealed with even a moderate mag- 

 nifying power, — the lip being inconiinuous posteriorly. I 

 have never discovered but one specimen of this curious little 

 shell ; this I found in the stomach of a haddock, in company 

 with several other minute species of shells, in the summer of 

 1842. I presume it is the only representative of the genus 

 that has been hitherto discovered on our Atlantic coast. 



