2IO 



CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



Calciferous 

 Diverticles. 



Calciferous 

 Diverticles. 



Calciferous 

 Diverticles. 



Three distinct and sepa- The two anterior ones The two anterior ones 

 rate pairs. connected. connected. 



Spermatheaz . 



The basal and apical 

 parts of about equal 

 width. Diverticle not 

 sessile. 



Nephridia. 



The ventral ones, or i, 

 are considerably nar- 

 rower than the lateral 

 ones, and furnished with 

 two separate coelomic 

 mantles. 



Spermathecce . 



The basal and apical 

 parts of unequal width, 

 apical part much small- 

 er. Diverticle sessile. 



Nephridia. 



The ventral ones, or i, 

 not much narrower and 

 furnished with only one 

 coelomic mantle. 



Spermatheccs . 



The basal part not much 

 wider than the apical 

 part, both globular and 

 of almost equal size. Di- 

 verticle sessile, longer 

 than in var. pacifica. 



Nephridia. 



The ventral ones, or i, 

 consist of two unequal 

 parts, each covered with 

 a coelomic mantle. They 

 are larger than the other 

 nephridia. 



Detailed Description. 



Size. — All the specimens are fully mature, with a large 

 clitellum; still none are over 30 mm. in length, while 

 several are less than 20 mm. Y^LrieXy pacifica is therefore 

 the smallest of the B. Bolavi group. 



Dorsal Pores. — The variety agrees with B. Bolavi, but 

 differs from B. palmicola in which the most anterior dorsal 

 pore is IV/V. 



Penial Setcs. — The smaller seta shows no forking but is 

 distinctly spoon-like. The figure (Eisen 18) of the smaller 

 seta of var. palmicola is probably incomplete and figured 

 from a side view, as a side view of the corresponding seta 

 of var. -pacifica shows a somewhat similar shape; but seen 

 from the face it is distinctly spoon-like (fig. 72). The 

 notches of the larger seta are much more pointed and look 

 like spines, while in var. pahnicola they are very blunt. 



Genital Zone. — The genital zone is not greatly depressed 

 but is rather flat. There is a slight elevation around the 

 prostate pores, and the groove connecting them is curved 

 towards the ventral median line of the body. 



