COE : XEMEETEANS OF WEST AND NORTHWEST COASTS. 



63 



hermaphroditic species are known from other parts of the world, 

 and all of these belong to the Hoplonemertea. 



The sexual glands are always of simple structure, each gland con- 

 sisting merely of a sac of sexual products situated in the parenchyma 

 between the alimentary canal and the body musculature. 



The sexual glands are usually limited to the intestinal region, 

 although in the parasitic Carcixonemeetes (Coe, : 02, p. 448) they 



Fig. 27. — Carcinonemertes epialti. Transverse section of body, showing thick 

 layer of submuscular glands (sgr), ovaries (ov) with large ova, and intestine {Ln) 

 reduced to a narrow canal. 



extend forward nearly to the brain. In I^mplectonema biirgeri and 

 AmpMporus occidentalis they extend forward far in front of the 

 opening of the p3dorus into the intestine. 



Where metameric intestinal lobes are found the sexual glands, 

 as a rule, alternate with them with great regularity. In compaia- 

 tively few cases is there more than one gland between two adjacent 

 intestinal lobes. 



In the parasitic Carcinonemertes, however, the intestinal lobes 

 are much reduced and the body packed so frill of sexual glands that 

 as many as 5 to 8 ovaries (Text-fig. 27) or 7 to 15 spermaries (Text- 

 fig. 28) may be encountered in a single transverse section of the 

 body. In some species of Tetrastemma and other minute hoplo- 

 nemerteans the eggs are of comparatively large size (PI. 22, fig. 



