GASTEROPODA. 



123 



I'edicularia sicula. 



Spiracella. Rang. — Shell very flatly compressed, 

 but with undulated sharp edges ; apex spiral, sinistral, 

 and twisted horizontally, lying towards the back and the 

 left side ; open on the under side ; an indistinct muscular 

 impression is seen at the back part of the shell, and ap- 

 pears to extend parallel to the edge. — 1 species, fossil. 



Pedicularia. Sw. ( Thy reus Phil.) — Shell irregular, 

 sub-patelliform ; a thick, large, obsolete 

 apex on the longest side, and an internal 

 callous rim within on one side only ; cir- 

 cumference undulated irregularly. Ani- 

 mal little known, but Philippi thus describes a dry 

 specimen : — Head placed on a long neck, and lengthened 

 into a snout; two filamentous tentacula, at the base of 

 which the eyes are placed ; the tongue, according to 

 Loven, is peculiarly furnished, the middle line having a 

 row of oblique square teeth with toothed edges, and on 

 each side are three rows of teeth, of which the first is 

 oblique and square, the following very lengthened, slender, 

 forming three dissimilar, curved, awl-shaped teeth. 1 species. 



Mr. Swainson, from whose drawing the annexed figure 

 is taken, says he found all the specimens adhering to 

 coral fished up on the coast of Sicily ; he supposes, from 

 the form of the shell, that it is perfectly sedentary, as it 

 embraces the coral most closely. He named it P. sicula. 



Family 21. — RINGICULA CEA. 



The animal is unknown of all the genera composing 

 this family. The shell is generally globular, sometimes 

 oval ; the aperture half-moon shaped, without a canal, or 

 notch ; the outer lip generally thickened, and turned 

 back, the inner lip having a callosity and thick plaits. 



