CoE.— Nemerteans. 



PLATE 15. 



Figs. 88 and 89, Carinoma mutahilis Griffin. 

 Figs. 90 to 92, Carinella sexlineata Griffin. 



Fig. 88. Carinoma mutahilis. Transverse section well toward posterior end of 

 rectum, showing the large amount of parenchyma {par) separating 

 the rectum (r) from the body walls. The proboscis sheath is cut 

 very near its posterior extremity. X 70. 



Fig. 89. Carinoma mutahilis. Transverse section very near posterior extrem- 

 ity, and behind posterior end of proboscis sheath, showing the 

 small size of the rectum (r) and the thick mass of parenchyma 

 (par) which occupies the greater portion of the space enclosed by 

 the body walls. X 70. 



Fig. 90. Carinella sezlineata. Portion of transverse section through the 

 mouth region, showing the position of the ventral and dorsal 

 ganglia («^, dg,) and the relation of the cerebral sense organ (cso) 

 to the latter. The dorso-median (dn), esophageal (en) and pro- 

 boscidial (pji) nerves are coaspicuous. The proboscis is here 

 attached to the sheath (p, ps), and is surrounded by several large 

 blood spaces {hi, lo). A thick fibrous basement membrane {bin) lies 

 between the integument and the brain and nerves. X 40. 



Fig. 91. Carinella sezlineata. Portion of transverse section of body in region 

 of lateral sense organ, showing relation of sense organ (Iso) to adja- 

 cent inteiiument and to the lateral nerve. The longitudinal mus- 

 culature is here divided into an outer and an inner portion (Im, Im') 

 by the parenchyma {par). The main nephridial canal (nep) is cut 

 within a few sections of the efferent nephridial duct. X 40. 



Fig. 92. Carinella sexlineata. Portion of transverse section in esophageal 

 region, and some distance anterior to section shown in Fig. 91, 

 showing the relation of the fine tubules of the nephridial gland (a) 

 to the lumen of the lateral blood vessel, and the large nephridial 

 canals lying dorsal thereto. The longitudinal musculature is 

 divided into, an outer and an inner portion (Im, Im') by the par- 

 enchyma (par) as shown in Fig. 91. X 80. 



