120 JESSE LE ROY CONEL 



The nuclei of the epithelial cells in the ducts of Myxine are 

 much nearer the bases of the cells than in Bdellostoma. Most 

 of them are round, but some are oval. All the cells have much 

 cytoplasm, and as a rule they are narrower at the middle than 

 at the ends. 



A very striking difference between the epithelial cells of 

 Myxine and those of Bdellostoma is the quantity and distribution 

 of the yellowish bodies. These are present in every ridge in 

 Myxine, more in some ridges than in others of the same section, 

 and more in some sections than in others. They are almost en- 

 tirely confined to the center of the ridge, forming a narrow core 

 which extends from the nuclei at the base of the cells to the top 

 of the ridge (fig. 64), but not to the very distal ends of the 

 cells. At the top of the ridges these yellowish bodies are in 

 rows, which spread out in the shape of a fan, following the ar- 

 rangement of the cells. The bodies vary in size from tiny gran- 

 ules to a diameter exceeding the width of a cell, and large and 

 small are intermingled in an irregular manner in all parts of 

 the core. 



There is much less connective tissue around the mesonephric 

 ducts and Malpighian bodies in Myxine than in Bdellostoma. 

 The Malpighian bodies are confined to the anterior two-thirds 

 of the duct, one in each somite. They are approximately the 

 same size as those of Bdellostoma, the largest at the anterior 

 end of the ducts and the smallest toward the posterior. Only 

 the compound type of tubules were found in Myxine, and these 

 are usually shorter than the compound tubules of the Malpighian 

 bodies in Bdellostoma. 



2. REPRODUCTIVE SYSTEM 



Myxine 



Fernale. The following is a general description of the female 

 generative apparatus in Myxine. It is not strictly applicable to 

 any one specimen, for there is much variation within certain 

 limits. Schreiner (/04) has given a very detailed account of the 

 ovary in the pAiropean Myxine, and examination shows that 



