ENCHYTR^IDyE IO9 



III. Spermathecse with many diverticles around the ampulla. 



Brain ovoid, posteriorly convex. Spermathecal diverticles of unequal size. 

 Chylus cells in XIV, XV and XVI ; ducts twisted; lower part without dis- 

 tinct lining membrane. Nephridial anteseptal very large, ovoid, without 

 granulation at the nephropore 8. F. macgregori &^. nov. 



Brain deltoid, posteriorly convex. Spermathecal diverticles of unequal size. 

 Chylus cells in XIV, XV and XVI with a short spur. Nephridial anteseptal 

 large, contracted at the center 9. F. californica sp. nov. 



FRIDERICIA HARRIMANI sp. nov. 



pi. XX, figs. 3-5; text-figs. 70 and 71. 



Definition. — Length 6 mm., width .5 mm. Somites 35 to 40, 

 with deep intersegmental grooves. Prostomium bkmt. Setae : ventrals 

 about 6 in each ventral fascicle and about 5 in the lateral ones anterior 

 to clitellum. The inner setae much thinner than the outer ones. 

 Dorsal pores normal. Head pore between prostomium and somite 

 I. Clitellum XII and XIII, not prominent. Sexual papillae small. 

 Septal glands normal. Peptonephridia short, each with at least two 

 branches starting from the base of the gland Brain deltoid, posteri- 

 orly broader than anteriorly ; posterior margin almost straight ; the 

 anterior margin conical. Dorsal vessel rises in XIV. Blood strongly 

 crystallizable. Intestine with numerous and thick chloragogen cells 

 containing large granules. Chylus cells in XI, XII and XIII. Sper- 

 matheca with long narrow duct and deltoid pouch opening into the 

 intestine. No diverticles. Sperm-funnels short, cubical, four times 

 as long as funnels .? Nephridia with an enormous anteseptal about as 

 large as the postseptal middle lobe. Lymphocytes not known. Color 

 of body white. 



Locality. — In decaying timber at Mountain View, California, Prof. 

 E. M. Ehrhorn. 



Characteristics. — This interesting species belongs to the group of 

 Fridericia sonorce and JF. fuchsi., characterized by absence of sper- 

 mathecal diverticles. From both these species it is distinguished by 

 the unusually large anteseptal of the nephridia. 



DETAILED DESCRIPTION". 



Brain. — This organ varies somewhat. In the majority of the 

 specimens opened it was distinctly deltoid, being broader posteriorly 

 than anteriorly. One specimen, however, possessed a brain with sides 

 nearly parallel. The posterior margin is more or less truncate, never 

 strongly convex. 



Blood. — The blood in all the specimens (fixed with the bichro- 

 mate acetic) was so highly crystallized that no good and perfect sections 



