NERILLA AN ARCHIANNELID. 
423 
21. Sclimidt, O. — ‘ Neue Beitr. z. Naturg. der Wiirmer,’ Jena, 1848. 
22. Shearer, C. — “ The Nephridia of Dinophilus,” ‘ Quart. Journ. Micr. 
Sci.,’ vol. 50, 1906. 
23. “On the Anat. of Histriobdella homari,” ‘Quart. 
Journ. Micr. Sci.,’ vol. 55, 1910. 
24. “ Sex Determination in Dinophilus,” ‘ Journ. Mar. Biol. 
Assoc.,’ vol. ix, 1911. 
EXPLANATION OF PLATES 38-41, 
Illustrating Mr. Edwin S. Goodrich's paper on “Nerilla 
an Archiannelid.” 
Reference Letters. 
a. Anus. ac. Anal cirrus, ae. Anterior eye. blv. Blood-vessel. 
bn. Branching network of ccelenchyme. hr. Brain, bw. Body-wall. 
c. 1 - 9 . Coelom of segments 1-9. cep. Coelomic epithelium, cgl. Clear 
gland-cells, cli. Chaetae. chs. Chaeta-sacs. ci. Cilia, con. Concretion. 
cop. Copulatory process, cr. Cirrus, cri. Ciliated ridge, erg. Ciliated 
ring. cvg. Ciliated ventral groove, delis. Dorsal chaeta-sac. dim. 
Dorsal longitudinal muscles, dv. Dorsal blood-vessel, ep. Epidermis. 
gat. Genital atrium, gl. Gland-cells, go. Genital opening, gr. Groove. 
grc. Granular cells. Ic. Cells with large granules, lo. Lateral nuchal 
organ. It. Lateral tentacle, m. Mouth, mt. Median tentacle, nv. 
Nerve cord, nepli. Nephridium. nf. Nephrostome. np. Nephridiopore. 
obhn. Oblique muscles. oes. (Esophagus. oegl, (Esophageal glands. 
om. Oblique muscles, ov. Ovum. ovd. Oviduct, ovdf. Oviducal funnel. 
ovdgl. Oviducal gland, ovs. Ovisac, ovy. Ovary, p. Pocket of ovisac. 
pe. Posterior edge. pli. Pharynx, pip. Palp. pp. ] - 9 . Parapodia of 
segments 1-9. r. Rectum, rt. Modified testis, s! Segment with 
spermatozoa (first genital). s\ Segment with granular-cells (second 
genital), s 3 . Segment with cells loaded with large granules (third 
genital), scp. Segmental ciliated patch, sp. Developing spermatozoa, 
spd. 1 -*. Three pairs of sperm-ducts, spf. Spenniducal funnel, spt. 
Septum. S8. Septal sac. st. Stomach, td. Dorsal-lobe of testis, vbw. 
Ventral body-wall, vclis. Ventral chaeta-sac. vim. Ventral longitudinal 
muscles, vnc. Vacuole in nepliridial cell. vv. Ventral blood-vessel. 
