rilAXEROrilTIIALMUS. 25 



Shell concealed in the mantle, loosely convolute, thin, 

 fragile, sub-orbicular or ovate, striate or punctate ; spire 

 small, often concealed ; aperture very wide and open ; 

 outer lip patulous. 



Syn. Lobaria, Mull. Amygdala marina, Plane. 

 Bullsea, Lam. Phyline, Voight. Philina, Lam. 



Ex. P. aperta, Linnaus, pi. 57, fig. 8. Shell, P. 

 aperta, fig. 8, a. 



The animals composing this genus are blind, like most 

 creatures that seek their food by burrowing. They fre- 

 quent mud-flats and slimy banks at the entrances of 

 rivers, which they perforate near the surface, and probe 

 with their flattened heads for the small bivalves which 

 constitute their prey ; these they seize and swallow entire, 

 breaking their shells by means of their testaceous, muscu- 

 lar gizzards. 



Species of Philine. 



aperta, Linn. pruinosa, Clark. 



catena, Mont. punctata, Adams. 



Coreanica, A. Adams. Sckroeteri, Phil. 



formosa, Stimp. scutulurn, Loven. 



orientalis, A. Adams. sinuata, Stimp. 

 quadrata, S. Wood. 



Genus rHANEROPHTHALMUS, A. Adams. 



Body elongated. Head-disk dilated at the sides in 

 front, bi-lobed behind ; eyes sessile on the upper surface. 

 Mantle covering the shell. Foot with the side-lobes 

 dilated, folded on the back, not united, but leaving be- 

 tween them a longitudinal fissure. 



