COE.— Nemerteans. 



PLATE 11. 



Figs. 66 to 72, Carinomella lactea C'oe. 

 Figs. 73 and 74, Neniertopsis gracilis Coe. 

 Fig. 75, Paranemertes ccdifornica Coe. 



Fig. 66. Portion of transverse section of proboscis tlirough middle chamber 

 somewliat in front of nephridial region of body, as in Fig. 71. 

 The peculiar columnar epithelium (pep), apparently provided with 

 long flagella {fl ) which end in a mass of deeply-stained secretion 

 (s), is indicated, as are also the layer of connective tissue, base- 

 ment layer and muscular layers. X 700. 



Fig. 67. Portion of transverse section of anterior chamber of proboscis in 

 same region as Fig. 68. The character of epithelial lining, the 

 thick basement membrane, one of the two proboscidial nerves, 

 and relations of other layers are shown. X 700. 



Fig. 68. Transverse section of proboscis through anterior chamber near bulb- 

 like enlargement. (Compare pb, PI. 5, figs. 47 and 49.) X 110. 



Fig. 69. A similar section through canal leading from anterior to middle 

 chamber. X 110. 



Fig. 70. A similar section through anterior portion of middle chamber. 

 X 110. 



Fig. 71. A similar section through middle chamber somewhat in front of 

 nephridial region of body. Compare Fig. 6i). X 110. 



Fig. 72. Two rhabdite cells from posterior chamber of proboscis, showing 

 small, rod-like rhabdite bodies (a) imbedded side by side in outer 

 portion of cell ; x, cell nucleus. X 1000. 



Fig. 73. Nemertopsis gracilis. Sketch of anterior portion of body after 

 clearing in cedar oil, showing the two longitudinal mai'kings (a), 

 the brain (br), cerebral sense organs (cso), and the four large 

 ocelli (0). X 25. 



Fig. 74. N. gracilis. Basis and portion of central stylet. X 280. 



Fig. 75. Paranemertes californica. Central stylet and basis. X 135. 



