CoE. — Nemerteans. 



PLATE 6. 



Carinomella lactea Coe. 



Fig. 50. General view of body in natural position. X 3. 



Fig. 51. Sketch of anterior portion of body of living worm, showing position 

 of rhynchodaeal opening (ro), mouth (?n), brain (br), proboscis {p), 

 and sexual glands (sg). X 12. 



Fig. 52. Ideal sagittal section of head, showing, by comparison with Fig. 51, 

 the much flattened head and the relation of mouth and rhyncho- 

 daeal openings. X 12. 



Fig. 53. Transverse section through head in front of brain, showing the 

 enormous blood lacunae (6Z), with the rhynchodaeum (rh) sus- 

 pended in their midst by thin shreds of tissue; nv, cephalic nerves. 

 X 72. 



Fig. 54. Transverse section of esophageal region shortly behind mouth. On 

 each side of proboscis (p) is a thick band of muscle (emp) which 

 enters proboscis a little more posteriorly and furnishes its mus- 

 cular attachment. Both upper and lower dorso-median nerves 

 are indicated. X 72. 



Note.— Figs. 53, 54, 55, 56, 57, 58, 59, 63, Pis. 6 to 10 form a series of 

 transverse sections through the principal anatomical regions of the body. 



