400 E. S. GOODRICH. 



9. Schroder.— " Anatomisch-histologische Untersuchuiig von Nereis di- 

 versicolor, O. Fr. Miill.," ' luaug.-Diss. Kiel,' 1886. 

 10. Vejdovsky.— " Eutwickelungsgescbichtliche Untersuchungen," 3rd part, 

 Prague, 1886. 



EXPLANATION OF PLATES XXXIV & XXXV, 



Illustrating Mr. E. S. Goodrich's paper " On a New Organ 

 in the Lycoridea, and the Nephridium in Nereis diver- 

 si col or, O. F. Mull." 



All the figures, except Fig. 9«, are from Nereis divers icolor, O. F. Miill. 



List of Reference Letters, 

 ap. Aperture through the septum leading from one segment to the other. 

 b. I. Boundary layer, bl. v. Blood-vessel, c. b. w. Cut body-wall. oil. 

 Cilia, oil, proc. Ciliated processes, circ. m. Circular muscles, cost. Coelom. 

 ccel. ep. Coelomic epithelium, ccel. corp. Ccelomic corpuscles, cut. Cuticle. 

 d. z. Dark zone. dors. cil. org. Dorsal ciliated organ, dors. cosl. Dorsal ex- 

 tension of the coelom. dors. long. m. Dorsal longitudinal muscle, dors. lip. 

 Dorsal lip of the funnel, dors. marg. fun. Dorsal margin of the funnel. 

 dors. teg. v. Dorsal tegumeutary vessel, dors. v. Dorsal vessel, ep. Epi- 

 dermis, excr. Excretory products, ext. cil. External cilia, fl. sept. Flap 

 of the septum, i. limb. Inner limb of the dorsal ciliated organ, int. Intes- 

 tine, int. cil. Internal cilia, int. op. Internal opening. I. mb. Limiting 

 membrane. I. neph. can. Lumen of the nephridial canal, lip of fun. Lip of 

 the funnel, lu.fun. Lumen of the funnel, n. Nucleus. «'. Nucleus of a 

 counective-tissue cell. n. can. Narrow canal, net. Network of supporting 

 substance, neph. Nephridium. neph. fun. Nephridial funnel. 7ieph. p. 

 Nephridiopore. o. limb. Outer limb of the dorsal ciliated organ, obi. m. 

 Oblique muscles, p. s. can. Post-septal canal, par. Parapodium. sept. 

 Septum, sp.m. Sperm-morulse. v. marg. fun. Ventral margin of the funnel. 

 vent. lip. Ventral lip of the funnel, vent. long. m. Ventral longitudinal 

 muscle, vent. teg. v. Ventral tegumeutary vessel, vent. v. Ventral vessel. 

 ves. Vesicles of excretory fluid, w.fun. Wall of the funnel, w. neph. can. 

 Wall of the nephridial canal. 1*/, 'ind, Zrd, ith reg. First, second, third, 

 and fourth region of the nephridial canal. 



