232 



bulletin: museum of comparative zoology. 



in length and .005-.008 mm. in diameter (Text-fig. 45). Accessory 

 stylets wanting. Posterior chamber oval, with small lumen and very 



massive glandular walls lined 

 T^dth high colunmar cells ir- 

 regularly arranged in several 

 layers (Text-figs. 7, 8, 9, 16). 

 Posterior chamber usually 

 bent sharply toward dorsal 

 side of body, and closely im- 

 bedded in surrounding con- 

 nective tissue (Text-figs. 8, 



'16). 



Cepludic glands extremely 

 voluminous, making up a 

 great part of the tissues of 

 head (Text-fig. 9). Back of 

 brain they pass gradually 

 into suhinuscidar glands 

 which extend as a very 

 thick layer throughout en- 

 tire body (Text-figs. 16, 27, 

 28) . The secretions of these 

 glands furnish the sticky 

 mucus by means of which the worms chng so tenaciously to the 

 crab or to other objects. 



Alimentarg canal. — Esophagus leaves rhynchodaeum just in 

 front of brain and passes beneath ventral 

 commissure as a narrow tube lined with 

 rather flat cells, as in other genera. Just 

 back of brain, however, it becomes enor- 

 mously enlarged with high, columnar, cili- 

 ated epithelium, richly provided with gland 

 cells (Text-fig. 16). This portion, the 

 stomach, is highly muscular and somewhat 

 barrel- shaped, projectmg a little way back- 

 ward into the broad intestine which imme- 

 diately follows posteriorly. This muscular 

 stomach (Text-fig. 16, e) is closely con- 

 nected with the prol)oscis by strong connective tissue fibers, and the 



Fig. 44 — Carclnonemertes epialti. Diagram of 

 body, showing ocelli, brain lobes, alimentary 

 canal (in dotted lines) and genital glands. 



Fig. 45. — Carclnonemertes 

 epialti. Several stylets, 

 with their bases showing 

 variations in form and size. 



