334 



ZOOLOGY 



SECT 



Digestive Organs. The mouth (mth) is a narrow crescentic 

 aperture situated in the middle of the lophophore, towards its 



-Jbd 



Jbl.st, 



v.m. 



FIG. 26(3. A. Body of Magellania lenticularis, removed from shell ; B, sagittal section 

 of the entire animal. Both semi-diagrammatic, the lophophore being represented as of smaller 

 proportional size than in the actual animal (</. Fig. 267). <'. (il. digestive gland ; ./. m. dorsa 

 mantle-lobe ; </. r. dorsal valve of shell ; prowl, gotft, gonads ; lit. heart ; ,nt. intestine ; Ip, W. 

 lip; Iph. lophophore ; I phi, its coiled process; m1h. mouth; nph. \\\ B, nephridmm. in A 

 nephridial apertiire ; pd. peduncle ; pi. si. pallial sinuses ; s. set* ; r. m. ventn 

 mantle ; c. r. ventral valve of shell. 



convex or ventral edge, and is bounded dorsally by the lip. It 

 leads into a V-shaped enteric canal which consists of a gullet, 



