NOTES ON HISTOLOGY OF LINGULA ANATINA. 29 



Abbreviations used in Plates. 



a. ni accessory nucleolus. 



ant. dr. Iv anterior dorsal lobe of liver. 



bl. cp blood corpuscle. 



cl. tn circular muscle of the stomach. 



cp compact body. 



d. o dendritic organ. 



dr. sh dorsal shell. 



ep. rd epithelial ridge. 



foil follicle cell. 



gl. ell gland cell of mantle. 



gm. ell germ cell. 



gst. pr. bd gastroparietal band. 



h heart. 



il. pr. bd ileo-parietal band. 



Icy leucocyte. 



kit M. lateralis. 



Iv liver lobule. 



rug. I marginal lacuna. 



m. pr parietal muscle. 



n nucleus. 



nph nephridium. 



obi. hit M. obliquus internus. 



occ. ant M. occlusor anterior. 



ot otocyst. 



oil otoliths. 



p. til principal nucleol lis. 



pli. sn palliai sinus. 



pig pigment. 



r. g refractive granu'e. 



spd spindle body. 



spl supporting layer. 



sttn stomach. 



vt si i ventral shell. 



