COE.— Nemerteans. 



PLATE 12. 



Carinoma mutabiUs Griffin. 



Fig. 76. Ventral view of anterior portion of body of specimen cleared in 

 cedar oil, showing relation of rliynchodaeal opening {ro), mouth 

 (m), esophagus (e), stomach (st), intestine, intestinal diverticula 

 (id), and sexual glands (sg). At x occurs the great thickening of 

 the internal circular muscles, the stomach at the same point being 

 reduced to a narrow canal. X 26. 



Fig. 77. Posterior portion of body of specimen cleared in cedar oil, showing 

 the gradual decrease in size of the intestinal diverticula {id) at the 

 approach to the rectum (r), and a corresponding increase in the 

 body parenchyma (par). X 26. 



Fig. 78. Transverse section through head in front of brain, showing disposi- 

 tion of cephalic blood lacunae (bl) about the rhynchodaeum {rh), 

 and the great development of glands (gl) beneath the integument 

 (t). X 64. 



Fig. 79. Portion of transverse section through anterior portion of esophageal 

 region, showing disposition of outer circular {oc7n), diagonal (dm), 

 longitudinal (Im) and inner circular (icm) musculatures ; bm, base- 

 ment membrane ; gl, glandular layer of integument ; a, delicate 

 integumental musculature. X 80. 



Fig. 80. Transverse section of proboscis, showing the epithelial and muscular 

 layers and the pair of large nerves. X 380. 



