n6 



EISEN 



Chylus cells in the somites posterior to clitellum are long and nar- 

 row, and open between larger ciliated epithelial cells. 



Seta are in fascicles of from four to six. The inner ones are 

 shorter. Sometimes there are three setae in one-half of the fascicle 

 and only two in the other. 



FIG. 76. Fridericia santcerosa. 



Spermatheca contains as a rule only two large diverticles, but in one 

 specimen I found the large diverticle of one side replaced by three 

 smaller ones. 



FRIDERICIA SANT^BARBAR^E sp. nov. 



Text-fig. 77. 



Definition. Length 10 to 12 mm., width .5 mm. Somites about 

 55. Setae of unequal length, 4, 5, and 6 in a fascicle, the inner ones 

 much shorter and narrower. Dorsal pores present. Head-pore be- 

 tween prostomium and somite I. Clitellum XII and XIII. Sexual 

 papillae small. Peptonephridia with several irregular tubes. Brain 

 from one and a half to two times as long as wide, and posteriorly and 

 anteriorly convex. Intestine with a thin layer of shallow chloragogen 

 cells. Spermathecae, with two large diverticles, connect with the 

 intestine. The penial bulb with two sets of glands opens respec- 

 tively into the base of the sperm-duct and along the base of the bulb. 

 No accessory penial glands and no prostate glands. Nephridia large. 

 Anteseptal large and swollen and filled with opaque granules ; ante- 

 septal with a winding duct. Lymphocytes of two kinds, the larger 

 kind ellipsoidal, with or without pointed ends. Color white. 



