ENCHYTR^EHXdE 1 15 



glands, which appear to be simple, could not be made out distinctly 

 enough to be described. 



DETAILED DESCRIPTION. 



Spermathecce are small and closely pressed to the body- wall. 

 They do not connect with the intestine. There are no diverticles. 

 The ampulla is thin- walled, with a single row of cells. 



Penial bulb is small and contains about one tier of cells. The 

 sperm-duct enters on the lateral side of the bulb, next to the lateral 

 body- wall. 



Chylus cells. The intestine next posterior to the clitellum contains 

 a continuous row of chylus cells containing chylus ducts. The cells 

 containing the ducts are very large and with a large nucleus. The 

 part of the cell opening into the intestinal cavity is drawn out like the 

 neck of a bottle. The ducts are different from those of any other 

 species. Each duct is surrounded by a thick wall, outside of which 

 is a thick body of granular cytoplasm. The duct twists around 

 in the cell but does not connect with ducts of other cells. These 

 chylus cells do not directly line the intestine but are overlapped by 

 an inner epithelial layer of cells which are strongly ciliated and be- 

 tween which the necks of the chylus cells open in the intestine. 



FRIDERICIA SANT^ROS^: sp. nov. 

 pi. xvi, figs. 4 and 5 ; text-fig. 76. 



Definition. Length 14 to 20 mm., width .75 mm. Somites 

 about 60 to 64. Seta of unequal length, the interior ones much 

 smaller. Prostomium small, but pointed and prominent. Clitellum 

 not prominent, XII and XIII. Male papillae small, cube-shaped. 

 Peptonephridia with four to six narrow tubules from a thick, elongated 

 base. Brain posteriorly rounded, or with a very slight emargination. 

 Dorsal vessel rises in XV. Intestine and dorsal vessel covered with a 

 thick layer of tall chloragogen glands. Chylus cells in XIV, XV and 

 XVI. Spermathecae with two diverticles each, and with long cylin- 

 drical duct ; distal part connected with the intestine. Sperm-funnels 

 longer than broad, with a lobate base. Penial bulb small, containing 

 a single row of glandular cells opening along the base of the bulb. 

 Nephridia with a long narrow postseptal and a shorter narrow ante- 

 septal. Lymphocytes large, elliptical. Color of alcoholic specimens 

 yellowish. No pigment. 



Locality. Santa Rosa, Sonoma County, California. Common 

 under oak trees near the city. Many adult specimens in May, 1893. 



