COE. — Nemerteans. 



PLATE 14. 



Carinoma mutabilis Griffin. 



Fig. 83. Transverse section of body at anterior end of intestinal region and 

 immediately behind posterior end of inner circular musculature, 

 showing the two limbs of the nephridial canal (nep), of which the 

 one nearer the lateral nerve is the limb which passes into the 

 efferent nephridial duct (compare Fig. 84). The single pair of 

 lateral vessels (Iv) have contracted walls. X 40. 



Fig. 84. Reconstruction of nephridial system, showing the complex system of 

 minute tubules constituting the nephridial gland (a), encroaching 

 on the walls of the lateral blood vessel (Iv), and then uniting into a 

 single large canal {nep) which passes into intestinal region and then 

 bends forward (nep') to the efferent duct (nd). The asterisk (*) 

 marks boundary between stomach and intestine proper. 



Fig. 85. Transverse section of lateral blood vessel and the nephridial gland 

 (in position marked a, Fig. 84), showing the minute nephridial 

 tubules projecting into the cavity of the blood vessel but without 

 having direct communication therewith. Several blood corpuscles 

 (a) are represented in lateral vessel. X 500. 



Fig. 86. Three blood corpuscles, showing the small but conspicuous nucleus 

 (a) and several rounded pigment bodies (x) in each. X 3500. 



Fig. 87. Transverse section of body in intestinal region, showing the large 

 intestinal diverticulum (id), ovary (ov), muscular layers, etc. 

 From a small individual. X 70. 



Note. — Figs. 78, 81, 82, 83, 87, 88, 89, Pis. 12 to 15 form a series of 

 transverse sections through the principal anatomical regions of tlie body. 



