PLATE XII. 



Bryodrilus udei sp. nov. 



FIG. I. Section through the anterior somites, br., brain; pkx., pharynx ; 

 ffln., ganglion enclosed in the anterior septal gland ; sep.gl., anterior 

 septal gland; dv., dorsal vessel; dfv., diverticle of the intestine 

 (there are four of these diverticles, only two appearing in the sec- 

 tion). 



2. One of the nephridia. The ducts are much ramified. 



3. Section through somite v, showing the spermathecae and their 

 junction with the intestine. 



3<z. A seta. 



4. Section through the penial bulb. The lower part of the sperm-duct 

 is furnished with small glands opening in the duct. Another set of 

 glands open on the exterior of the bulb. 



Lumbricillus merriami sp. nov. 



5. Spermatheca. 



Lumbricillus merriami elongatus var. nov. 



6. Spermatheca. 



