56 Journal of Entomology and Zoology 
EXPLANATION OF FIGURES 
Fig. 1. Cross section of the lopophore organs of Phoronis pacifica showing sections 
of tentacles. X 70. 
(a) Each tentacle is made up of a circular band of muscle within which is found 
a small blood vessel. 
Fig. 2. Cross section of base of lopophore organ of Phoronis, showing the begin- 
ning of the buccal cavity, the anal opening and the bases of the tentacles. X70. 
Fig. 3. Cross section of the anterior end of Phoronis. X70. 
(a) Digestive tract., (b) blood, (c) nerve ganglion, (d) nephridia, (e) anal end 
of intestine, (f) base of tentacles. 
Fig. 4. Cross section through the upper end of the body of Phoronis. X70. 
(a) esophagus, (b) blood, (c) dorsal blood vessel, (d) intestine, (e€) nephridia, 
(f) epithelium of body cavity. 
Fig. 5. Section of the body of Phoronis farther back. X70. 
(a) stomach, (b) blood, (c) mesentery, (d) nerve, (e) intestine, (f) epithelium, 
(g) longitudinal muscles of body wall. 
Fig. 6. Section through the body of Phoronis near the end of the body. X70. 
(a) gonads, (b) stomach, (c) intestine, (d) mesentery, (e) epithelium, (f) longitu- 
dinal muscle of body wall, (g) circular muscle of body wall, (h) longitudinal nerve? 
Fig. 7. Section of body wall. X300. 
(a) epithelium of surface, (b) circular muscle, (c) longitudinal muscle. 
Fig. 8. Section base of tentacles. X300. 
(a) epithelium, (b) muscle, (c) blood. 
Fig. 9. Section of ganglion of Phoronis. X300. 
Fig. 10. Blood corpuscles massed together. X300. 
Fig. 11. Section of ciliated epithelium of digestive tract. X300. 
