ZooL— Vol. III.] ROBERTSON— ASCORHIZA OCCIDENTALIS. 107 



ABBREVIATIONS USED IN THE FIGURES. 



a. — aperture. 



b. — base. 



br. — bristles. 



cap. — capitulum. 



d. — disc. 



dia. — diaphragm . 



g. b. — green body. 



i;z^.— intestine. 



/. — lumen. 



m. b. — muscle bud. 



ni. p. — muscle plate. 



my. — myoecia. 



oe. — oesophagus. 



p. b. — polypide bud. 



ped. — peduncle. 



ph. — pharynx. 



r. — rectum. 



stk. — stalk. 



St. — stomach. 



tent. — tentacles. 



trans, re. — transitional region. 



z. — zocecia. 



z. re. — zooecial region. 



